Question

1. Tidal volume is _____

   1. The amount of air remaining in the lung after expiration

   2. The volume of air that moves in (and out) of the lungs in a single breath

   3. The amount of air that remains in the airways after expiration

   4. The volume of air that the lungs can hold when maximally inflated

   5. Atmospheric pressure

2. The exchange of oxygen and carbon dioxide between the lungs and the blood is called ____

   1. Pulmonary ventilation

   2. External respiration

   3. Internal respiration

   4. Cellular respiration

   5. expiration

3. As the amount of carbon dioxide in the bloodstream increases, ______

   1. The number of hydrogen ions decreases

   2. The pH of the blood decreases

   3. The pH of the blood increases

   4. The respiration rate slows

   5. The blood becomes more alkaline

4. Carbon dioxide binds to hemoglobin to form ____

   1. Oxyhemoglobin

   2. Carbonic acid

   3. Bicarbonate ions

   4. Carbaminohemoglobin

   5. surfactant’

5. The right lung has ____

   1. 1 lobe and the cardiac notch

   2. 2 lobes, 1 fissure, and the cardiac notch

   3. 3 lobes, 2 fissures, and the cardiac notch

   4. 2 lobes and 1 fissure

   5. 3 lobes 2 fissures

Answer 1

1.Tidal volume is the volume of air that moves in and out in single breath.

(OR)

It is the volume of air inspired or exoir s during each normal respiratory cycle.

(OR)

It is the volume of air inhaled or exhaled with each normal breath which is 500ml.

Answer is option B

2. Exchange of oxygen and carbon dioxide between lungs and blood is called external respiration.

Answer is option B.

In internal respiration carbon dioxide diffuses from tissues to blood.

cellular respiration uses organic molecules as energy source.oxygen is used as reactant and carbon dioxide is liberated.

pulmonary ventilation is nothing but act of breathing involving exhalation and inhalation.

expiration is process of sending air out of respiratory system.

3.As the amount of carbon dioxide increases in blood, pH of blood decreases.

As CO2 combines with water (H20) it forms carbonic acid(H2O3)

As carbonic acid is formed ,it will automatically decrease blood pH as it will exist as bicarbonate and hydrogen ions.

so,hydrogen ions will decrease pH of blood.

Answer is option B.

4.Carbon dioxide binds to haemoglobin to form carbaminohemoglobin. Answer is option D.

5.Right lung has 3 lobes and 2 fissures

Answer is option D.

Whereas left lung has 2 lobes and 1 fissure.

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