Question

1.Microorganisms (pathogens) trapped below the nasal mucosa eventually end up in the

A.Trachea

B.Larynx

C.Alveoli

D.Stomach

2.Which of the following are in the respiratory zone/division?

A.Bronchi

B.Nasal cavity

C.Trachea

D.Alveoli

3.A substance released by cells in the lungs to reduce surface tension

A.Cerebrospinal fluid

B.Carbaminohemoglobin

C.Surfactant

D.Pleural fluid

4.The majority of the force responsible for normal resting expiration is supplied by

A.External intercostal muscles

B.The diaphragm

C.Internal intercostal muscles

D.Elastic recoil of alveoli

5.These membranes reduce friction on the surface of the lungs and provide a barrier for isolating infections.

A.Surfactant membranes

B.Pleural membranes

C.Pericardial membranes

6.The pressure in the thorax _____________ when the diaphragm and external intercostal muscles contract which causes air to __________ the lungs.

A.Decreases/move out of

B.Decreases/move into

C.Increases/move into

D.Increases/move out of

7.This non-respiratory action functions to clear upper respiratory pathways (like when clearing out partials of waste) and is created by a build-up of pressure in the thorax followed by a sudden opening of the glottis and thus a sudden release of air.

A.Cough

B.Sneeze

C.Hiccup

D.Yawn

8.When one O₂ molecule binds to hemoglobin…

A. The protein becomes more receptive to additional O2 molecules

B. The hemoglobin demonstrates positive feedback

C. All the answers are correct

9.During exercise, blood pH will ____________ and Hemoglobin molecules will unload O₂ ____________ rate than before the exercise began.

A.Increase/at a slower

B.Decrease/at a slower

C.Decrease/at the same

D.Decrease/at a faster

10.Breathing rate is most likely to increase if the blood level of

A.Carbon dioxide decreases

B. Hydrogen ions decrease

C.Carbon dioxide increases

D.Oxygen increases

Answer 1

1. A. trachea

explanation: Trachea has ciliated columnar cells that traps the microorganism

2. d. Alveoli

Explanation: respiratory zone is the area where gaseous exchange occurs

3. C. Surfactant

Explaation: these are surface active agents that helps to reduce surface tension just like the detrgents.

4. D. elastic recoil of the alveoli

5. A. Surfactant membrane

6. B. Decreases/move into

7. A. Cough

8. C. All the answers are correct

9. D.Decrease/at a faster

Explanation: Exercise results in generation of lactic acid that decrease the pH of the blood resulting faster unloading of O2 from Hb.

10. C.Carbon dioxide increases

Eplanation: It stimulates the respiratory cnter to increase the rate and depth of ventilation