Answer:
It has a positive change in stroke volume.
Explanation:
The amount of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction is referred to as stroke volume. During systolic contraction, the heart pumps blood into circulation.
Sympathetic nerves also innervate or stimulate the middle muscular layer of the heart wall. Therefore, an increase of activity in the sympathetic nervous system will trigger an increase in the force of contraction of the heart and, therefore, increase stroke volume. An increase in stroke volume also translates to the pressure of blood being pumped through the arteries.
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In the tonicity of red blood cells lab, if you had chosen the strategy "I will measure The volume changes to the solution added to the red blood cells before and after the treatment to see if the amount of solution changes," would this be an effective strategy? Why or why not?
Answer:
The correct answer is No.
Explanation:
Measuring the volume change after placing:
In a hypertonic solution - solvent moves outside of the cell and the cell shrinks, the change in volume of solvent would be very minute to observe or measure as the RBCs are very small cells.
in a hypotonic solution - the change in the solvent or solute or overall solution is very less and will be very insignificant to come to any result. The water volume change would be difficult to measure.
describe the organization of skeletal muscle at tissue level
The organization of skeletal muscle at tissue level is made up of:
• Epimysium; around the muscle belly.
• Perimysium; surrounding the muscle fascicles.
• Endomisium; coating the muscle fibers, which in turn, are made up of myofibrillar structures.
The muscle cell or fiber is the structural and functional unit of muscle tissue. The skeletal muscle tissue has a striated appearance.
Muscle fibers are organized in bundles surrounded by an outer connective tissue membrane, called the epimysium.
Very thin septa of connective tissue start from this, which are directed towards the interior of the muscle, dividing it into fascicles, these septa are called perimysium.
Each muscle fiber is surrounded by a very thin layer of reticular fibers, forming the endominsium.
The connective tissue holds the muscle fibers together, allowing the contraction force generated by each individual fiber to act on the entire muscle, thus contributing to its contraction.
Therefore, we can conclude that the organization of skeletal muscle at tissue level of the striated muscle fibers is given by the connective tissue that is organized in: Endomysium, Perimysium and Epimysium.
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Cyclic AMP phosphodiesterase is an enzyme that catalyzes the conversion of cyclic AMP to a different molecule. Which of the following best predicts the effect of inhibiting cyclic AMP phosphodiesterase in a muscle cell stimulated by epinephrine?
The concentration of cyclic AMP will decrease because adenylyl cyclase will no longer be activated.
The G protein will diffuse out of the cell because it will no longer bind to the plasma membrane.
Phosphorylase kinase will remain active because protein kinase A will no longer be deactivated.
Glycolysis will stop because epinephrine signaling will no longer stimulate glycogen breakdown.
Answer:
Phosphorylase kinase will remain active because protein kinase A will no longer be deactivated.
Explanation:
Phosphodiesterase is an enzyme that has the function of hydrolyzing cAMP by converting it to AMP. As a result, a protein called kinase is inactivated and lipids break down in fat metabolizing cells. CAMP is a cellular messenger. Cyclic AMP phosphodiesterase, in turn, is an enzyme that catalyzes the conversion of cyclic AMP into a different molecule. as a result, a molecule called kinase A is deactivated. However, if inhibition of cyclic phosphodiesterase AMP in a muscle cell stimulated by adrenaline, Kinase A will not be deactivated, so phosphorylase kinase will remain active.
Which of the following is NOT a function of the skeletal system?
Explanation:
where is the option of the Question
Choose 1 Transport Mechanism in a cell and make a relatable analogy based on your experience recently. Explain .
Answer:
Active transport across membranes is like refilling an empty soda can after pouring the soda into a cup. It takes effort (energy in the form of ATP) to pour the soda back into the can, it wouldn't typically happen on its own.
Explanation:
Cells use several transport mechanisms to move substances across their plasma membranes. Plasma membranes control all movement of substances through passive transport, which does not use energy; and active transport which requires chemical energy in the form of ATP.
Active transport moves substances out of cells against their gradients. In the cell, glucose can be transported inwards for respiration. However, because the internal environment is typically concentrated, (and glucose is needed in high amounts) this requires the use of transport enzymes and ATP.
The question above is intended to assess your ability to relate cell transport types to your personal experience. For that reason, I can't answer this question for you, but I'll help you answer it.
As you may already know, cell membranes limit the transport of substances into and out of the cell. This makes the cell create a mechanism that allows it to absorb and expel substances. These mechanisms are the cell transport mechanism.
Below you will find a definition of cell transport:
Simple diffusion: Allows molecules to be transported into or out of the cell. In this process, they leave the place where they are in greater concentration to a place with less concentration. An example of this can be seen in an elevator that is full of people, reaching the point where some people need to get out of the elevator and stay outside, where there is no one.Osmosis: Allows the transport of water into or out of the cell. In this case, the water leaves where it has a lower concentration of salts and goes to where it has a higher concentration of salts. An example of this can be seen when you need to add milk to dilute your powdered chocolate.Facilitated diffusion: This also allows the transport of substances into or out of the cell. These substances leave the place where they are in greater concentration to the place of lesser concentration, but leave with the help of specific proteins. An example of this can be seen when the postman takes your package from the post office and takes it to your house.Active transport: Occurs in the same way as facilitated diffusion, but it is the only type of cell transport that allows the cell to spend energy. An example of this occurs when you have to leave the house and go to the post office to pick up your package.More information:
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CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION THANK YOU !!
Answer:
D
Because you need a lot of feed for livestock to gain weight for slaughter
6.Prokarytes differ from eukaryotes by
Select one:
O a. enclosing their DNA in a nucleus.
O b. by having mitochondria.
O c. by being multicellular.
O d. by having the DNA in the nucleoid area.
Answer:
a. enclosing their DNA in a nucleus.
Explanation:
Prokaryotes in general have no membrane bound organelles. The cells are enclosed in a plasma membrane though .
If the population of rats in your community is doubled, what effect would
this have on the resources of the community?
Answer:
The community would be out of resources
Explanation:
the doubling of the rat would surely affect the resources of the community.
Which of these are natural events that change ecosystems?
-flood, pollution, deforestation
-earthquake, overpopulation, fire
Answer:
Wind, rain, predation and earthquakes are all examples of natural processes which impact an ecosystem. Humans also affect ecosystems by reducing habitat, over-hunting, broadcasting pesticides or fertilizers, and other influences
Explanation:
Answer:
earthquake is the natural events that change ecosystems
Explanation:
flood pollution, deforestation , overpopulation and fire are all man made.
Choose all the answers that apply.
Which of the following factors are determining factors in a biome?
sunlight
wind speed
air pollution
temperature
rainfall
You can chose multiple.
Answer:
-temperature and rainfall
Explanation:
Terrestrial biomes are defined as regions of similar vegetation and climates. Certain types of vegetation have specific growth requirements for their optimal water and temperature. They tend to thrive within regions where these needs are met, thus making up the dominant plant types.
At or close to the equator, biomes are warmer due to the high intensity of sunlight (the equatorial regions the most sunlight), and warmer air holds more moisture, making the regions more prone to rainfall.
Answer:
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Explanation:
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Traits, such as your hair or eye color, are
determined by the proteins made by cells in
your body.
True or false, if false then explain
Egg and sperm cells are ______; when fertilization occurs, the resulting offspring are _____. A. gametes; haploid B. haploid; diploid C. haploid; clones D. gametes; clones
Answer: B. haploid; diploid
Explanation: Egg and sperm cells contain a single set of chromosomes and are known as haploid. Haploid is having a single set of unpaired chromosomes in a cell or nucleus. A diploid is a cell or nucleus containing two complete sets of chromosomes, one from each parent.
Photorespiration lowers the efficiency of photosynthesis by removing which of the following from the Calvin cycle?
a. ATP molecules
b. carbon dioxide molecules
c. ribulose bisphosphate molecules
d. RuBP carboxylase molecules
e. glyceraldehyde phosphate molecules
Answer:
Option B.
Carbondioxide molecules.
Explanation:
Photorespiration lowers the efficiency of photosynthesis by removing carbondioxide molecules because photorespiration begins in Calvin circle as a result of Rubisco acting on oxygen instead carbondioxide and it's function is to first initiate and input carbondioxide in Calvin circle. Therefore instead of using Carbondioxide as the pathway , it uses oxygen. Carbondioxide is use for photosynthesis because it combine with water in the presence of light energy and chlorophyll to produce glucose and oxygen.
Why are invasive species significants?
Answer:
Invasive species can change the food web in an ecosystem by destroying or replacing native food sources. Invasive species can also alter the abundance or diversity of species that are important habitat for native wildlife.
Explanation:
how are nucleotides joined together from the dna chain
Answer:
Nucleotides are joined together by covalent bonds between the phosphate group of one nucleotide and the third carbon atom of the pentose sugar in the next nucleotide. This produces an alternating backbone of sugar - phosphate - sugar - phosphate all along the polynucleotide chain.
Explanation:
PLEASE HELP!!!!!!!!! Which two factors most likely lead to fertile soil?
A. Medium permeability
B. Temperatures of 5-10°
C. Very high porosity
D. A large amount of humus
Answer:
Medium permeability
Very high porosity
Explanation:
Fertile soil would need to be able to smoothly transfer water and air throughout the soil properly. This way, they can transfer important nutrients.
Why and how do living things do cellular respiration?
Answer:
Cellular respiration is a metabolic pathway that converts nutrients into energy (ATP) that organisms need to live. ... The oxygen you breathe is used to break down the nutrients you consume through food in order to make ATP, while carbon dioxide and water are generated as waste
Explanation:
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Answer: All living things use cellular respiration to turn organic molecules into energy. Cellular respiration is the chemical process of breaking down food molecules in order to create energy in the form of adenosine triphosphate (ATP). ... Cellular respiration usually occurs in the presence of oxygen.
5. There is a layer of extrusive rocks in the diagram, how did it get there? What event happened?
Answer:Extrusive rock, any rock derived from magma (molten silicate material) that was ... By contrast, intrusive rocks are formed from magma that was forced into older rocks at ... Encyclopaedia Britannica's editors oversee subject areas in which they have ... from intrusive rocks on the basis of their texture and mineral composition
Explanation:
The presence of a layer of extrusive rocks is due to a single volcanic eruption and its presence in the middle of a rock formation may be because these rocks are younger than the surrounding rock formations.
What are extrusive rocks?The presence of a layer of extrusive rocks in the middle of a rock formation refers to the geological history of the area. These rocks are formed from lava that has been erupted from a volcano and cooled quickly on the Earth's surface followed by the cooling at the surface of the Earth. This suggests that a volcanic event has occurred in the area.
When a volcanic eruption occurs, lava is ejected from the volcano and flows onto the Earth's surface followed by its solidification into extrusive rocks which have fine-grained texture.
The presence of extrusive rocks in the middle of a rock formation may be due to a single volcanic eruption or these rocks are often younger than the surrounding rock formations.
Therefore, the presence of extrusive rocks is due to a single volcanic eruption and may be younger than the surrounding rock formations.
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Which of these would you be doing if you are interacting with the geosphere?
A) rock climbing
B) swimming
C) riding in an airplane
D) sailing
Answer:
A) Rock climbing
Explanation:
The geosphere of the Earth includes all of its solid parts - the rocks, minerals, and landforms of its surface and interior. If we know this, we can conclude that the activity that involves interaction with the geosphere is rock climbing. Rocks are a part of the geosphere, and as we attempt to climb them, we are interacting with them.
Swimming and sailing are examples of interaction with the hydrosphere.
Riding in an airplane is an example of interaction with the atmosphere.
please help!! I need help with this punnet square :( the mom’s eyes will be brown and the dad’s eyes will be brown
In one to three sentences, describe what happens during the reduction stage of the Calvin cycle
Answer:
ATP and NADPH transfer chemical energy to 3-PGA.
Glyceraldehyde 3-phosphate (G3P) is created.
G3P is used to make sugar.
Explanation:
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During the reduction stage of the Calvin cycle, the 3-PGA molecules produced by carbon fixation are transformed into simple sugar molecules – glucose.
In this step, the energy is supplied by the ATP and the NADPH produced during the light-dependent photosynthesis reactions.
ATP, or NADPH, is used to transform the 3-PGA molecules into three-carbon sugar molecules (G3P molecules). The name “G3P” comes from the fact that NADPH gives electrons to, or breaks down, a 3-carbon intermediate to form G3P.
Carbon dioxide in the atmosphere undergoes a redox reaction to glucose. This redox reaction requires the total reduction of CO2 using the electrons available in the oxidation of the NADPH. Thus, the dark reactions are a redox pathway. Calvin-Benson cycle.
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Special lymphatic vessels, called lacteals, absorb dietary __________ that are not absorbed by the blood capillaries.
Answer:
This question lacks options, options are:
A. water
B. glucose
C. vitamins
D. amino acids
E. lipids
The correct answer is E.
Explanation:
Lipids are a heterogeneous group of organic compounds divided into fats or oils, phospholipids and cholesterol esters. The lymphatic vessels are responsible for the transport of lipids and fat-soluble vitamins (A, D, E and K), which are absorbed through the digestive tract, that is, they act as capturers of fats and excess fluids from the human body, always present in the blood vessels. They do not carry blood, but lymph, a clear liquid. They play an important role in the transport of fats, in the recovery of fluids that escape from the blood capillaries and in the fight against infections. In the small intestine, specialized lymphatic capillaries transport lipids from the diet to the lymphatic vessels and, ultimately, to the blood. The presence of these lipids makes the lymph drained through the small intestine appear creamy white.
If drawn into a food web, why would every arrow point to the decomposers?
Decomposers are organism that decomposes the dead and decay matter. So all arrows in a food web are pointed toward decomposers because at last, after decaying, eaten by decomposers.
What are decomposers?Decomposers are living organisms that feed on the dead and decayed matter of plants and animals. The main decomposers are bacteria, fungi, etc. They live on decaying matter.
They are called the cleaners of the environment because they decompose the matter and convert it into manure and fertilize the soil. Thus, they learn about the environment. At last, when every living matter dies, they are eaten by decomposers.
Thus, Decomposers are those that break down decaying and dead materials. Decomposers are therefore the target of all arrows because they are, in the end, the ones who consume the decayed matter.
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The image shows a process called vegetative reproduction, in which a new plant grows from a part of another plant. Which
statement is true about the offspring formed by this process?
A. It's genetically identical to
parent
B. It forms through sexual reproduction
C. It can't develop genetic mutations.
D. It has exactly half the amount of genetic information as its parent.
Answer:
i think its eather A or D
Explanation:
(its most likely A)
If a pollen tube does not grow from the pollen grain during gymnosperm reproduction, which of the following would be the most likely outcome?
The pollen would only be able to fertilize eggs inside the same cone.
The pollen would not be able to reach the eggs inside the female cones.
The pollen would then require a moist environment to swim to the egg.
The pollen would instead be dispersed to female cones by wind.
Answer:
The pollen would not be able to reach the eggs inside the female cones.
Explanation:
How are speed and velocity similar?
A.
They both tell you the direction the object is traveling.
B.
They both tell you how fast the object is traveling.
C.
They both tell you the acceleration of the object.
Answer:
The answer is B. They both tell you how fast the object is traveling.
Explanation:
Sorry if this is wrong. Just trying to help!
Which of the following processes produces new cells with identical genetic makeup in humans?
O A cytosis
0 B. apoptosis
O
C. mitosis
O D. meiosis
Answer:
mitosis
Explanation:
Mitosis produces daughter cells that are basically replicas to their parent cells. As the daughter cells duplicates itself, it has make sure the chromosomes were split equally.
If it displays 3/4 of its near side before the full moon, which phase is the moon in?
Answer:
Waxing gibbous moon.
Explanation:
Waxing gibbous moon is called the lunar phase that occurs between the middle of the first quarter and the full moon, that is, when the sunlight covers more than 50% of the visible lunar surface but less than 100% of it. Thus, it is the fourth phase of the moon, within the crescent half of the cycle of said celestial body.
Answer:
Waxing Gibbous
Which of the following is the most efficient substance to complete cellular respiration?
on
a.sugars
b.fats
c.proteins
d.nucleic acids
Which describes one of the ways proteins behave in facilitated diffusion?
Answer:
They create channels.
Explanation:
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