Question

01 Why do we need to breathe in oxygen?

Select one:

a. It allows for hydrolysis of water

b. It allows NADH to be recycled to NAD when pyruvic acid is converted to lactic acid

c. It donates an inorganic phosphate to make ADP into ATP

d. It allows the proton pumps in the inner membrane of a mitochondrian to continue pumping

e. It's needed to start the hydrolysis of glucose

02 All of the following are true for O2 and cellular respiration EXCEPT

Select one:

a. Glucose + O2 results in ATP + H2O+ CO2

b. Final electron acceptor

c. Allows proton pumps to continue pumping

d. Provides energy for ATP synthase

e. Ends up as part of H2O

03 Using the analogy of a guitar string and pick for the helium voice, what is the string?

Select one:

a. Vocal folds

b. Vocal cords

c. Epiglottis

d. Air

e. Larynx

04 What type of blood vessel provides oxygen TO the lung tissue?

Select one:

a. Bronchial artery

b. Bronchial vein

c. Coronary artery

d. Pulmonary vein

e. Pulmonary artery

05 Damage to or absence of type II, surfactant producing pneumocytes of the lungs is associated with all the following EXCEPT

Select one:

a. A decrease in surface tension in the alveoli.

b. A decrease in surface area for gas exchange.

c. A decrease in the rate of gas exchange.

d. Premature births.

e. Lung collapse.

Answer 1

1. b. It allows NADH to be recycled to NAD when pyruvic acid is converted to lactic acid

Explanation: during lactic acid formation in anaerobic glycolysis, NADH is converted into NAD using O2 and pyruvate is converted into lactate.

2. Allows proton pumps to continue pumping

3. b. Vocal cord

Explanation: Vocal cords are analogous to the string of the guitar responsible for sound generation.

4. a. Bronchial aretry

Explanation: Bronchial artery provides oxygen rich blood to the lungs.

5. A. A decrease in surface tension in the alveoli

Explanation: function of the surfactant is to reduce surface tension of the fluid in the alveoli. decreased surfactant leads to increase surface tension that results in decrease in diameter of the alveoli leading to alveolar collapse.