The correct answer would be c. An increase in lung volume decreases the pressure within the lungs so air can flow inside.
During inspiration or breathing in, the diaphragm contract and move downwards which increases the volume of the chest cavity. Consequently, the volume of the lungs also increases.
In addition, the contraction of intercostal muscles pulls the ribcage outwards and upwards which also increases the size of the chest cavity.
This also increases the lung volume due to which the air pressure inside the lungs is decreased as compared to the air pressure outside the body.
It results in the movement of air inside the lungs from outside the body as air moves from the region of high pressure to the region of low pressure.
B. 2 molecules of ATP are used and 4 molecules of ATP are produced.
<h3><u>Explanation</u>;</h3>
Glycolysis is the first phase of ecllular respiration that converts one six-carbon molecule of glucose into two three-carbon molecules of pyruvate.
One glucose molecule produces four ATP, two NADH, and two pyruvate molecules during glycolysis.
The net products of this process are two molecules of ATP, since four molecules of ATP are produced and 2 ATP molecul;es are used, and two molecules of NADH.
