Your respiratory system prevents harmful substances from entering the lungs by using: .Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean
Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean.
What is inspired air?Due to exchanges that occur in the alveoli, the amount of gases in the air that is breathed in and out varies. We only take in about 4 to 5 percent of the oxygen found in atmospheric air, and we exhale air with about 16% oxygen.
Normal air contains about 0.04% carbon dioxide, and as it diffuses from the blood into the alveoli, we exhale air with about 4% carbon dioxide. Exhaled air is hotter than that which we breathe in and includes more water vapor than that which we breathe in.
In contrast to ordinary smell, which occurs during the inhalation phase, the olfactory contribution to flavor occurs during the exhalation process. As a result, we can conclude that expired air differs from inspired air in terms of oxygen content, bacterial density, and water vapor content.
Therefore, Mucus produced in the trachea and bronchial tubes to keep air passages moist and aid in intercepting dust, bacteria and other substances; The sweeping motion of cilia (small hairs in the trachea) to keep air passages clean.
To learn more about inhaled air, refer to the link:
https://brainly.com/question/28215431
#SPJ2
Ponies which are mostly found in Europe have an average height of 86-97 cm. If the ponies breed among themselves, is it possible that the offspring will have the normal height of a horse which is about 160 cm? *
a. Yes
b. No
Answer:
A
Explanation:
Since mutations do occur it is likely that a mutation of height will occur
Which is not true about axial skeleton ?
a) it supports the body
b) it protects vital organs
c) leg bones are part of the axial skeleton
d) ribs ,skull are part of the axial skeleton
Answer:
B
Explanation:
because it doesn't protect vital organs
Answer:
protects vital organs
Explanation:
An ocean layer in which the temperature drops with depth faster than in other layers is called a thermo cline. True or false
Answer:
true
Explanation:
That is the exact definition of thermocline
Answer: true
Explanation:
hope it helps
What would happen if there were no condensation stage in the water cycle?
answer : there would be no rain.
water is more dense than cooking oil
Answer:
True
Explanation:
Water is more dense than cooking oil
Answer:
water more dense than cooking oil
Explanation:
water molecules are packed more closely together than the long molecules that make up oil, the oxygen atoms in water are also smaller and heavier then the carbon atoms in oil.
Hope this helps
What does gene mutation mean?
Answer:
Gene mutation are changes in single DNA bases or small intragenic delentions and rearrangements.
A scientific__offers a scientific explanation about why something and is supported by a large number of experience
Answer: A scientific Hypothesis.
Explanation:
A scientific hypothesis is the initial building block in the scientific method. Many describe it as an "educated guess," based on prior knowledge and observation. While this is true, the definition can be expanded. A hypothesis also includes an explanation of why the guess may be correct, according to National Science Teachers Association.
In the overall equation for photosynthesis, six molecules of carbon dioxide and six
molecules of water result in a molecule of sugar and six molecules of
Answer:
Oxygen
Explanation:
Formula for photosynthesis- 6CO2 + 6H2O → C6H12O6 + 6O2
1) What is the control group? 2) What is the experimental group? 3) What is the independent (manipulated) variable? 4) What is the dependent (responding) variable? 5) What should Tina's conclusion be?
Complete question:
Tina asks the question “Does caffeine increase the heart rate of an earthworm?” In Test 1, she measures the heart rate by looking at the earthworm under a microscopes, the earthworm has a heart rate of 50 bpm (beats per minute). In Test 2, she places a few drops of caffeine on the earthworm’s skin and measures the rate again. In this test, the heart rate is 68 bpm.
1) What is the control group?
2) What is the experimental group?
3) What is the independent (manipulated) variable?
4) What is the dependent (responding) variable?
5) What should Tina's conclusion be?
Answer:
Individuals from test 1Individuals from test 2CaffeineHeart rateTina´s hypothesis is correct. Caffeine increases the heart rate of an earthworm.Explanation:
During an experiment, data from an experimental group is compared with the data from a control group. Both groups are selected from the same pool or population, so they are identical in all aspects except for the independent variables.
The control group is used to identify any other factors influencing the results obtained in the study, apart from the modified variables of the treatment.
The experimental group is the one affected by the experimental procedure or treatment. The researcher voluntarily changes the independent variables in the experimental group to observe how they affect the group under study. These variables are kept constant in the control group, not influencing the results, while the experimental group receives the treatment. There can be several experimental groups.
Independent (manipulated) variable: Refers to all the variables in an experiment that provoke a response in another variable. An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it. It changes to analyze its effects on the dependent variable. Usually, the independent variable is represented by the X letter. Dependent variable: Refers to the variable, which response depends on any change in the independent variable. It represents a quantity of something which value depends on how the independent variable is modified. The change in the dependent variable might be proportional or inversely proportional to the change in the manipulated variable. It is usually represented using the letter Y. Controlled variable: Refers to the variables that have no influence on the results. These variables do not affect the change in the dependent variable values.1) What is the control group?
Individuals from test 1 compose the control group. They are not affected by the treatment. Tina just uses them to measure the normal heart rate and to compare them with individuals from test 2.
2) What is the experimental group?
Individuals from Test 2 compose the experimental group. They are affected by the treatment. Tina drops caffeine on their skin to see how it affects the worms.
3) What is the independent (manipulated) variable?
Caffeine is the independent variable. Tina manipulates the number of drops she places on the worm´s skins.
4) What is the dependent (responding) variable?
Heart rate is the dependent variable. Tina evaluates how the heart rate changes in individuals with or without caffeine.
5) What should Tina's conclusion be?
Caffeine increases the heart rate of an earthworm. It changes from 50 to 68 bpm. Tina´s hypothesis is correct.
According to the author, how has the almond tree
monoculture affected honeybees in Central Valley,
California? What evidence is provided to support the
claim?
I
Hello. You did not enter the text to which this question refers, which makes it impossible for it to be answered. However, I will try and help as best I can.
The only way you can answer this question is by reading the text. During this reading, you will notice that there is an element in monoculture that is harming bees, making them have a very difficult life or even die. This element is what is affecting the bees. The author will show why this element is harmful to bees through sentences that prove the effect that this element promotes and how it only exists in monocultures. These sentences will be the text evidence.
It is likely that the author shows how monoculture requires a large use of pesticides, which ends up harming the life of bees. He can also show that monoculture decreases the availability of food for bees, since all monoculture plants only flower once a year and leave the bees without food for the rest of the year, as there is no plant diversity in the monoculture.
Answer:
sample response
Explanation:
Because of the growth of the almond trees, many honeybees have died. Honeybees do not naturally live near the trees so they are transported to the area in order to pollinate the trees. However, the bees are exposed to pesticides that are used on the trees. Many also likely die because the almond trees only bloom in February, so the bees do not have enough food for the rest of the year.
True or false
Linkage and crossing over are inversely related.
helpppppppjtyjyf fdfdfd
Answer:::
Explanation:
What consist of hydrogen and carbon
Answer:
Hydrocarbon
Explanation:
A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H).
Why is long loose hair dangerous in a lab? Select all that apply.
It can catch fire over an open flame.
It can get caught in the lab equipment.
Long loose hair is not dangerous in a lab.
It can fall into a beaker full of chemicals.
Answer:
it can get caught in equipment, catch fire or fall into chemicals
Hope This Helps :D
Nitrogen in plants and soil is changed into nitrogen compounds by _____.
nitrogen fixation
respiration
denitrification
photosynthesis
Answer:
I think it is denitrification but if that's not the answer then it's nitrogen fixation I'm pretty sure.
Explanation:
I'm sorry for not giving a sure complete answer
Explain why a seismic station on the opposite
side of the Earth may receive P-waves from an
earthquake, but not S-waves.
Answer:
P-waves travel faster than S-waves.
Explanation:
P-waves can go through solids, liquids, and gases. This allows them to go through the earth. Meanwhile S-waves shake the ground going crosswise and can only travel on the earth's crust.
organ pembiakan jantan
Answer:
Male reproductive organ is responsible for sexual function.
Explanation:
Male reproductive organ produces sperm which combines with eggs of female reproductive organ produces fertile offspring. The male reproductive system is mostly located outside of the body. The external organs include the penis, scrotum and testicles while on the other hand, internal organs include the vas deferens, prostate and urethra. The male reproductive system is responsible for sexual function, as well as removal of waste material from the body.
How do light intensity and distance affect the rate of photosynthesis? How do you know?
Answer:
Light provides the energy needed for photosynthesis. Increasing the light intensity increases the rate of photosynthesis, provided plenty of carbon dioxide and water are available. ... This states that the intensity of light is inversely proportional to the square of the distance from the source.
Explanation:
Answer:
Light provides the energy needed for photosynthesis. Increasing the light intensity increases the rate of photosynthesis, provided plenty of carbon dioxide and water are available. ... This states that the intensity of light is inversely proportional to the square of the distance from the source.

https://www.bbc.co.uk › revision
Besides the outside layer of the cell, where else is the phospholipid
bilayer found?
Answer: The phospholipid bilayer can also be found in organelles that have a membrane such as the nucleus, mitochondria, chloroplasts etc.
What are sphincter muscles? The circular muscles that act as a valve is called sphincter muscles.
Answer:
A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. ... Sphincters relax at death, often releasing fluids and faeces.
Explanation:
muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. ... Sphincters relax at death, often releasing fluids and faeces.
Two new products are competing for grant money, with the goal of cleaning up the marine environment. Each product removes plastic from the ocean.
Product 1 can be used in the open ocean and requires monitoring once every three months to retrieve collected plastic.
Product 2 is designed to be used in harbors and marinas and requires monitoring once per week to retrieve collected plastic.
If all other costs and benefits are equal, which of these products would you recommend for the grant?
A. Product 1 because it requires less monitoring, reducing the overall cost
B. Product 1 because it is presumed to be more effective at removing plastic
C. Product 2 because it would provide more job opportunities for local people
D. Product 2 because it would probably last longer in marinas than in the open ocean
Answer:
A. Product 1 because it requires less monitoring, reducing the overall cost
Explanation:
Product 1 is more favorable to use than product 2, because its need for monitoring and maintenance is less. This allows the cost of plastic collection to be lower, assuming the subsidy money would be spent more optimally, promoting savings while promising results are observed at sea. In other words, product 1 promotes efficient cleaning at a lower cost, while product 2 promotes efficient cleaning at a higher cost.
Why are amino acids called “amino acids?”
They are subunits of macromolecules that act as both strong acids and strong bases in solution.
They are single molecules that contain both an amine group and a carboxylic acid group.
They are acidic and were first discovered by a Russian researcher by the name of Aminov.
Answer:
The name “amino acid” is derived from the amino group and carboxyl-acid-group in their basic structure.
Explanation:
volume of alr inspires
in one minute/dm
before the race
5.8
after the race
20.5
(1) Calculate the difference in the volume of air inspired in one minute by the student before
the race and after the race.
Volume=
dm
(i) State two other ways in which
the students' breathing changes from before the race to
after the race
1.
[2]
2.
(ii) Explain why an increased volume of air is needed during the race.
Answer:
its the first onw if i remeber
Explanation:
easy
How have the newt and snake caused each other to evolve
What base in RNA pairs with adenine?
uracil
guanine
cytosine
thymine
Answer:
Uracil
Explanation:
Which of the following diseases can be cured using antibiotics?
A. AIDS
B. Dengue
C. Typhoid
D. Malaria
Answer:
C. Thyphoid
Explanation:
right answer got it right on edg 2021
Answer:
The answers is corresponding
Explanation:
Nice have a nice day
Answer:
I agree
Explanation:
yes
 In order for a male to have the recessive disease, what what is genotype be?
Answer:
im pretty sure it will be XX
what will happen to the body when we are in a higher surrounding temperature
Explanation:
The heart begins to pump more through outer body parts and skin so that excess heat is lost resulting to sweating
Fertilizer grade is the relative _________ in a bag of fertilizer.
Proportion
Percentage
Grade
Ratio
Answer:
proportionhejenrn4nrrh4htj