Q: Which equation describes the partial pressure of a gas in a mixture?

$$P_{gas} = \text{fraction of gas} \times P_{total}$$

Question 1

Which of the following is NOT a primary function of the respiratory system?

Accepted Answer

Regulation of blood glucose levels

Question 2

During childbirth, how does the respiratory system assist in the process?

Accepted Answer

By creating pressure changes in the thoracic cavity to aid in pushing

Question 3

Which structure is responsible for warming, humidifying, and filtering air before it reaches the lungs?

Accepted Answer

Nasal cavity

Question 4

What is the main function of the sinuses in the respiratory system?

Accepted Answer

To lighten the skull and contribute to voice resonance

Question 5

Which type of mucosa lines the superior nasal cavity and contains olfactory receptors?

Accepted Answer

Olfactory mucosa

Question 6

Air moves from the conducting zone to the respiratory zone. What is the primary difference between these two zones?

Accepted Answer

The respiratory zone is where gas exchange occurs

Question 7

Which equation best describes the relationship between pressure and volume in the lungs during ventilation?

Accepted Answer

$$P 	imes V = k$$

Question 8

A patient inhales air at sea level, where atmospheric pressure is 760 mmHg. If the partial pressure of oxygen in air is 21%, what is the partial pressure of oxygen?

Accepted Answer

$$160 	ext{ mmHg}$$

Question 9

Which of the following best explains why the right primary bronchus is a common site for inhaled foreign objects?

Accepted Answer

It is wider, shorter, and more vertical than the left

Question 10

Which process is most directly responsible for the movement of oxygen from alveoli into pulmonary capillaries?

Accepted Answer

Simple diffusion

Question 11

Which of the following would most likely decrease the efficiency of pulmonary gas exchange?

Accepted Answer

Thickening of the respiratory membrane

Question 12

What is the effect of increased surface tension in the alveoli?

Accepted Answer

Alveoli are more likely to collapse

Question 13

Which structure is responsible for propelling mucus and debris out of the airways?

Accepted Answer

Ciliated respiratory mucosa

Question 14

Which of the following best describes the role of the pleurae in lung function?

Accepted Answer

They prevent lung collapse by adhering lungs to the thoracic wall

Question 15

Which equation describes the partial pressure of a gas in a mixture?

Accepted Answer

$$P_{gas} = 	ext{fraction of gas} 	imes P_{total}$$

Question 16

Which of the following would most likely result in hypoventilation?

Accepted Answer

Decreased rate and depth of breathing

Question 17

Which structure connects the middle ear to the pharynx and helps equalize pressure?

Accepted Answer

Eustachian tube (pharyngotympanic tube)

Question 18

Which of the following is a function of the larynx?

Accepted Answer

Voice production

Question 19

Which of the following best describes the role of the respiratory pattern generator (RPG)?

Accepted Answer

It sets the basic rhythm for breathing

Question 20

Which of the following would increase the compliance of the lungs?

Accepted Answer

Decreased alveolar surface tension

Respiratory System: Structure and Function Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard