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Diano4ka-milaya [45]
3 years ago
14

Describe the changes in our lungs when we breathe in and breath out?

Biology
1 answer:
Vedmedyk [2.9K]3 years ago
5 0

When you breathe air in your diaphragm tightens and moves downward. It also increases the space in your chest cavity causing your lungs to expand.The muscles in your ribs also help to enlarge your chest cavity. This causes your rib cage to pull upward and outward when you inhale. When you exhale the exact opposite happens.

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The lung volume that represents the total volume of exchangeable air is the ________. A. vital capacity B. expiratory reserve vo
olga2289 [7]

Answer:

A. vital capacity

Explanation:

<u>Vital capacity is defined as maximum amount of the air that a human can expel from lungs after the process of maximum inhalation. In other words, its is the volume of the lung which represents the maximum of the total volume which can be exchanged with the air. </u>

It can be measured by using a wet or a regular spirometer. A normal adult has between 3 to 5 litres of VC. Vital capacity of the human depends on the age, sex, mass, height and ethnicity.

5 0
2 years ago
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all plants give out oxygen during day and carbon dioxide during 9 to you agree with this statement give reason​
ankoles [38]

Answer:

Yes, I agree with the given statement.

Explanation:

Plants undergo the process of photosynthesis for the production of their food. In this process, they require the presence of sunlight, carbon dioxide, water, minerals, and chlorophyll. The process of photosynthesis is possible only during the day because sunlight is one of the major components. Carbon dioxide is taken in by the plant through the stomata from the environment. The oxygen is formed as a product of the process and is released in the environment. This process becomes impossible during the night because of the absence of sunlight. The entire process sums up to that the plants give out oxygen during the day and give out carbon dioxide during the night.

7 0
3 years ago
Agriculture led to an increase in the size of the human population. Which of the following was the most important impact of agri
klemol [59]

Answer:

The answer is the first option.

Explanation:

Farming emerged because being a nomad was no longer suitable for increasing population size. Farming allowed people to stay in one place and properly feed their families, which was a definite positive impact on population size.

8 0
3 years ago
What is the function of mitochondria in cells?
castortr0y [4]
It’s B the other person put D but that’s the cell wall or cell membrane

HOPE THIS HELPS !
3 0
2 years ago
Select the correct statement about chemical energy, a term used by biologists to refer to potential energy available for release
vekshin1

Answer:

A photosynthetic cell within a plant leaf produces chemical energy, stored within glucose molecules.

Explanation:

The energy captured from sunlight by Photosystems in chlorophyll is used to split a water molecule and reduce carbon dioxide to carbohydrates. This energy from sunlight is therefore stored in the chemical bonds of the glucose molecules. It is thereafter harnessed during cellular respiration when the chemical bonds of glucose are broken and the energy transferred to make ATP molecules.  

5 0
3 years ago
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