Its the outer layer for exchanging substance in and out the cell. Thats also the reason why cell membrane are partially permiable
1. Which group of clinical findings describes the typical presentation of ALL (acute lymphoid leukemia)?
Answer:
Pain in long bones, infection, fever, bruising
Explanation:
Acute lymphoid leukaemia is a cancerous disorder of the bone marrow that affect the body's lymphocytes or red blood cells.
It occur more in children and develop when there there is errors in the DNA of the bone marrow.
Pain in long bones, infection, fever, bruising are the clinical findings of acute lymphoid leukaemia because this condition affect the white blood cells that is the body defence cells that help to fight against infections. When it is beeen affected, infections set in, there will be bruises, pains, fever e.t.c.
Which of the following items in this staining exercise are
potentially dangerous to the student?
Select all of the correct statements.
A. Microbial culture
B. Nigrosin and crystal violet
C. Bunsen burner
D. Microscope
E. Water spray bottle
What are biological pumps and Carbonate pump? In ocean...
Answer:
The carbonate pump is sometimes referred to as the “hard tissue” component of the biological pump. ... While the biological carbon pump fixes inorganic carbon (CO2) into particulate organic carbon in the form of sugar (C6H12O6), the carbonate pump fixes inorganic bicarbonate and causes a net release of CO2
Explanation:
several highly educated scientists study the same scientific data which of the following is most likely to explain why they may have different conclusions
Answer:
It's up to the reserchers interpretation of the results.
Explanation:
Answer:
Conclusions involve the scientist’s interpretation.
Explanation:
Type the correct answer in the box. Spell all words correctly. What are the types of wastewater? You can find two types of wastewater: household and ( blank) wastewater.
Answer:
its commercial on plato i looked long and hard to find it
Explanation:
The lac operon - TRUE or FALSE: Group of answer choices Before the induction of the lac operon, lactose transporters are completely absent from the cell membrane.
Answer: False.
Explanation:
The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli bacteria, as well as in some other enteric bacteria. It has three adjacent structural genes, a promoter, a regulator and an operator. The lac operon is regulated by several factors, including the availability of glucose and lactose.
The lac operon is under a type of negative regulation, where the genes can always be transcribed, except when the Lac I repressor protein is attached to the operating region, for which it presents a high affinity. In this case, the promoter of the lac gene I is constitutive, for which the Lac I protein is permanently expressed and remains united in tetramer form to the operative region, preventing the transcription of the structural genes.
In the presence of lactose, lactose is the inductor of the operon. It is capable of binding to the repressor protein Lac I and generating a conformational change that decreases its affinity for the operating region. In this way, the operator region remains free, RNA polymerase can freely transcribe the structural genes and β-galactosidase can degrade lactose to glucose and galactose.
In absence of lactose, Lac I repressor protein maintains its high affinity for the operator region, preventing RNA polymerase to transcribe structural genes. In this way, the system remains closed with the consequent energy saving for the bacteria.
The lac operon is an inducible circuit which encodes the genes for the transport of lactose into the cell. But before the induction of it (in absence of lactose), the lactose transporter is not really completely absent from the membrane. There are some active lactose carriers at the basal level.
If blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be
Explanation:
any increases in cardiac output (HR and/or SV), blood viscosity or total peripheral resistance will result in increases in BP.
hope this helps you
According to the flow rate fromula, if blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be the same, it would not change.
What is blood pressure?Blood pressure refers to the strength applied by the blood against the vessel walls as it flows.
This pressure depends on the strength and volume of the bombed blood as well as by the vessel size and flexibility.
Blood pressure changes continuously according to the activity, temperature, diet, emotional state, among others.
Whast is the peripheral resistance?Total peripheral resistance refers to the resistance offered by the vascular system to the blood flow.
This resistance is due to the friction of the blood against the vessel's walls. In other words, it is the opposition of the vessels to blood flow.
The total peripheral resistance is the summary of all the bloody circuit resistances in the body.
Mechanisms that induce vasoconstriction cause an increase in total peripheral resistance, while vasodilation provoke a decrease in total peripheral resistance.
Flow rateThe flow rate equals the pressure difference divided by resistance to flow.
Flow rate = pressure difference / resistance to flow
According to this formula, if blood pressure doubled at the same time that the peripheral resistance doubled, the blood flow through a vessel would be the same, it would not change.
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______ are chemical messengers secreted by glands. Exocrine glands, such as sweat glands, secrete fluids through ducts. _______ glands secrete hormones directly into the bloodstream. The _______ gland plays an important role in puberty and growth. Epinephrine, triggering the "fight or flight" response, is produced by the _______ glands, which sit on top of the kidneys. Most glands that secrete hormones operate using feedback mechanisms. When hormone concentrations are high, the gland will produce ________ of the hormone. Many cells produce chemicals called _______, hormone-like substances that impact inflammation and reproduction. The gland that helps regulate growth, body temperature, and the level of calcium in the blood is called the _______. Describe the function and compare steroidal and nonsteroidal hormones. How does each type of hormone interact with the cell? What other molecules are required for or involved in their function?
ANSWERS:
1. Hormones
2. endocrine
3. pituitary
4. adrenal
5. less
6. prostaglandins
7. thyroid
8. Steroidal hormones enter the cell directly and interact with DNA inside the nucleus. These hormones change gene expression, affecting the RNA that is produced and the proteins that are translated in a cell. Nonsteroid hormones do not enter the cell. Instead, they bind to specific receptors on the outside of the cell membrane. This triggers molecules called secondary messengers, such as cAMP, to begin their work of relaying information in the cell, where other chemicals, messengers, and proteins are involved to create a cellular response.
Answers:
Hormones are chemical messengers....
Endocrine glands secrete hormones...
The pituitary gland plays...
is produced by the adrenal glands...
the gland will produce fewer amounts of the hormone...
produce chemicals called paracrine factors...
blood is called the thyroid.
Steroid hormones are synthesized from cholesterol, while nonsteroid hormones are synthesized from modified amino acids and small peptides. Non-steroid hormones are not lipid-soluble and therefore they need to bind to a receptor on a cell membrane; while steroid hormones can diffuse through the cell membrane.
Explanation:
Hormones are signaling molecules synthesized by glands. The endocrine glands include the adrenal glands, pineal gland, thyroid gland, parathyroid gland, pituitary gland, ovaries, testes, pancreas and hypothalamus. The pituitary gland is an endocrine gland that secretes hormones capable of stimulating the adrenal glands in order to produce steroid hormones. Hormone levels are often modulated by negative feedback, by which high-hormone levels reduce their own production. Paracrine factors (also known as growth and differentiation factors) are proteins that can diffuse across small distances in order to induce responses in neighboring cells. The thyroid gland secretes hormones involved in regulating metabolism and growth. Moreover, the thyroid gland also secretes calcitonin that regulates calcium levels in the blood.
Hormones are chemical messengers that are secreted by glands.
Endocrine glands secrete hormones directly into the blood stream. The pituitary gland plays an important role in puberty and growth . Epinephrine hormone is a crucial part of the body's fight-or-flight response which is produced by the adrenal glands which are located on top of the kidneys.
When hormone concentrations are high, the gland will produce less amount of the hormone. Many cells produce chemicals called hormone like substances that impact inflammation and reproduction of the organism. Parathyroid gland are the gland that helps regulate growth, body temperature, and the level of calcium in the blood.
Steroid hormones are synthesized from cholesterol and has the ability to diffuse through the cell membrane while on the other hand, non-steroid hormones are synthesized from amino acids and small peptides. Non-steroid hormones are not lipid-soluble and therefore they need to bind to a receptor on a cell membrane.
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In a nutrient medium that lacks histidine, a thin layer of agar containing around 10^9 Salmonella typhimurium histidine auxotroph produces around 13 colonies over a two day incubation period at 37 degrees centigrade. How do these colonies arise in the absence of histidine? The experiment is repeated in the presence of 0.4 micrograms of 2-aminoanthracene. The number of colonies the number of colonies produced over 2 days exceeds 10,000. What does this indicate about 2- anthracene? what can you surmise about its carcinogenicity?
Answer:
We can conclude that colonies were able to grow in the absence of histidine due to reverse mutations that enabled the colony to synthesize histidine for its survival. Regarding 2-aminoanthracene, we can see that it induces mutations in an environment, which can be related to a high potential for carcinogenicity.
Explanation:
Reverse mutations can also be called suppressor mutations and occur when a mutation restores a number of genes that were disabled in an organism, for some reason.
According to the action of 2-aminoanthracene shown in the question above, we can conclude that it is a compound that induces mutations, so it was used in the culture medium with no histidine to stimulate reverse mutations in colonies, so that they would grow in that medium culture and synthesize the histidine itself.
However, we must note that a cancer can be developed through mutations. If 2-aminoanthracene is a mutagenic agent, we can consider it an agent with high carcinogenicity.
In order to prevent self-digestion of the pancreas, activation of pancreatic proteases occurs in the __________.
Answer:
duodenum
Explanation:
In mammals, the duodenum represents the initial portion of the small intestine, while the pancreas is a gland that secretes enzymes into the duodenum in order to help with the process of digestion of foods consumed. The pancreas secretion contains distinct enzymes including, among others, trypsinogen, chymotrypsinogen, amylase, and lipase which are capable of breaking down larger macromolecules. The pancreas also secretes insulin and glucagon hormones required to regulate blood sugar levels. Moreover, it is important to note that the duodenum is also involved in the absorption of iron.
What basic organizational principle is true of the ECM of animal cells compared with plant cell walls
Explanation:
In order to form tissues, individual cells must bind and communicate with each other. Extracellular material surrounds cells to provide cohesion and structure. This structural component is known as the extracellular matrix (ECM) for animal cells and the cell wall for plant cells. Although they are made up of different components, both the ECM and cell wall have similar structures. Both consist of structural fibers, a hydrated matrix, and adhesive molecules.
Which one of Edwin Hubble’s findings that support the Big Bang Theory
Answer:
Edwin Hubble's findings supporting the 'big bang theory' are as follows – almost all galaxies are moving away from us and the 'farther away a galaxy' is, the faster it is moving away.
Explanation:
The theory speaks of an ever-expanding universe and the proponent calculated the Law of Hubble.
Answer:
the Universe started from a centrail point about 5 billion years ago so A's ur answer
Explanation:
What is the correct order from highest level to lowest level of taxonomic hierarchy?
Answer:
-_-
Explanation:
The kingdom has the highest rank followed by division, class, order, family, genus, and species. Species has the lowest rank in the hierarchy.
Different creatures are identified, categorized, and described using taxonomy. With the help of this approach, each species is given a distinctive name that makes species tracking simpler.
The taxonomic hierarchy was introduced by Linnaeus. It is also known as a Linnaean hierarchy. It is used to classify organisms into different categories. It includes the sequence of categories in a decreasing or increasing order from kingdom to species and vice versa.
This hierarchy's taxonomic category or rank refers to each level. Kingdom is always listed first in this system of categorization, then division, class, order, family, genus, and species.
Thus ,the highest level is kingdom and the lowest is species.
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The way people understand and make sense of others and themselves is known as
Answer:
Social Cognition. is the answer
A small group of foxes moved to a new environment, starting a new population. They began with a population of 10 foxes, and over the course of 2 years expand into a population of 40. The population increased rapidly, but now food starts to become harder to find, and much of the living space is occupied. The population still grows, but at a decreased rate. Which part of the growth phase is this population currently in?
Answer and Explanation:
The exposed example refers to a population that exhibits a logistic growth model. Population growth depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.
When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.
If the population size, N, is inferior to K (N<K) the population can still grow. When N approximates to K, the population´s growth speed decreases. When N=K, the population reaches equilibrium, and when N is superior to K (N>K) the population must decrease in size because there are not enough resources to maintain that size.
The sigmoid curve represents the logistic growth model. At the beginning population grow slowly. In the exposed example this occurred when the small group of 10 foxes moved to the new environment, starting a new population. In the second stage, the population size increases rapidly. Probably this happened when foxes reached a number of 40 individuals. And finally, slow and gradually, the population reaches the equilibrium point, K, which depends on resource availability. This point belongs to the stage where food starts to become harder to find, and much of the living space is occupied.
As the foxes population in the exposed example is still growing but in a decreased rate, we could assume that this population is reaching its carrying capacity, but it is not there yet. This population is reaching the top of the sigmoid curve. N is approximating to K, and the population´s growth speed decreases.
Answer: Transitional
Explanation: since there are no options the answer is
Which element us considered the most versatile element in living organisms and why?
Answer:
Carbon, because it provides strength to the important protein, keratin. So, Carbon is considered the most versatile element in living organisms.
Explanation:
________ is a product of the Calvin Cycle that is used to form glucose phosphate, amino acids or fatty acids.
A. PEP carboxylase (PEPcase)
B. carbon dioxide
C. glyceraldehyde-3-phospate (G3P)
ATP
D. ribulose bisphosphate (RuBP)
Answer:
option C is correct that is glyceraldehyde-3-phosphate
Explanation:
Answer:
i would say c, got it right on ed2020
Explanation:
According to cell theory_______.
All cells have a nucleus
all cells reproduce by mitosis
all cells are differentiated
all living organisms are composed of cells
Explanation:
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[tex]<font color = purple >[/tex]According to the cell theory ,cell is the basic structural and functional unit of life all organisms are made of cells.New organisms originate from pre existing organisms.These are three fundamental postulates of cell theory.
mitochondria?
Without mitochondria, does this organism still
carry out all the basic functions of life?
Answer
No
Explanation:
You can't survive without mitochondria, the organelles that power most human cells. Mitochondria are the descendants of bacteria that settled down inside primordial eukaryotic cells, eventually becoming the power plants for their new hosts.
The microorganisms that inhabit the sludge at the bottom of a lake would live in which microbiota zone
Answer:
Explanation:
In a lake, oxygenic phototrophs produce new organic material as well as O₂. If primary production rates are very high, the resultant excessive organic matter production can lead to bottom-water O₂ depletion from respiration and the development of anoxic conditions. This in turn stimulates anaerobic metabolisms, including anaerobic respirations and fermentations.
Organic matter that is not consumed in surface layers sinks to the depths and is decomposed by anaerobes.
A. If all of the conditions are present for Hardy-Weinberg equilibrium, what will be the frequencies of the alleles A1 and A2 in the next generation? B. Select one of the conditions for Hardy-Weinberg equilibrium and explain how it would impact the allele frequency from generation to generation.
Answer:
The frequencies will be the same if equilibrium is in place.
Explanation:
A single motor neuron together with all the skeletal muscle fibers it innervates is called a:_______.
a. a dermatome.
b. an end plate.
c. an end foot.
d. a motor unit.
Answer:
d. a motor unit
Explanation:
A______________
can be described as a possible answer to a
scientific question based on scientific knowledge.
Answer:
Explanation:
Hypothesis
Can a dragonfly fly if it’s wings are weat
Answer:
no. it cant take off as quickly so they take shelter under leaves and things as it rains.
Please help!!! The first menses is called the A. Menarche B.menopause C.climacteric D.emission E.ovulation
Answer:
menarche
Explanation:
who is the first prime minister of India
Answer:
Jawaharlal Nehru
Explanation:
Jawaharlal Nehru took oath on 15 August 1947. Nehru went on to serve as prime minister for 17 consecutive years, winning four general elections in the process.
"A research group is looking for a way to use spider silk, valued for its high tensile strength, to make extremely strong ropes, but spiders only produce small amounts of silk. They have isolated the gene and have inserted it into cows to produce the silk protein in their milk where the scientists can collect it in large quantities. What is this process called?"
Answer:
The correct answer is "Transgenics".
Explanation:
The missing options of this question are:
A. Artificial selection
B. Transgenics
C. Bioreaction
D. Recombination
The correct answer is option B. "Transgenics"
Transgenics is a term used to describe the artificial insertion of one or more DNA sequences to an organism that would normally not have it. In this example, the term transgenics applies to the cows that serve as hosts for the production of the spider silk. The process transgenics is what gives the name to terms such as "transgenic food", "transgenic plants" or "transgenic animals".
Why do scientists communicate their results?
Answer:
It is important to share what you have learned with others.
Explanation:
Scientists often find solutions to problems by knowing the results of other scientists' experiments. Communicating your results is often the first step to clearly identifying a problem and beginning to think about possible solutions.
Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.
Answer:
Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.
Explanation:
Scientists often communicate their research results in three general ways. One is to publish their results in peer-reviewed journals that can be ready by other scientists. Two is to present their results at national and international conferences where other scientists can listen to presentations.
Hope it helps!
Choose which are qualities common to all respiratory surfaces.
a. The respiratory surface into contact with air or water
b. The surface has a moist membrance
c. The respiratory surface interfaces with a closed circulatory
d. The surface is within either paired or unpaired lungs
e. Carbon dioxide diffuses from the enviorment into the animal body across the respiratory surface
f. Gas exchange occurs across a large surface area
g. Oxygen diffuses from the animal body into the enviorment across the respiratory surface
Answer:
The options B and F are common for all respiratory surfaces.
Explanation:
All respiratory surfaces are involved in some form of gas exchange.
So firstly, the respiratory surface needs to have a moist membrane to be able to get the gases to diffuse properly. Option B is correct.
The surface area must be large and the surface of the respiratory system must be thin so that the maximum amount of gas can be diffused for increased efficiency. Option F is correct.
I hope this answer helps.
If a new anti-cancer drug is found to be effective in initial tests with mice, what might researchers conclude?
Answer:
If you have any more information about this question that would help to answer appropriatly. If the question is asking about tests done in mice and then in humans I would propose that the initals trial work and now they can begin more tirals that involve dosing to find the levels of toxicity.
Explanation:
I hope this helps.