Respiratory System Physiology

Question 1

what is inhalation?

Answer 1

bringing air inside of the lungs

Question 2

what is exhalation?

Answer 2

pushing air out of the lungs

Question 3

What does it take to achieve inhalation and exhalation?

Answer 3

change in pressure within the thoracic cavity

Question 4

What muscles contract and relax to achieve inhalation and exhalation?

Answer 4

diaphragm and external intercostal muscles

Question 5

What does inhalation involve?

Answer 5

contracting the diaphragm and external intercostal muscles increases the area of the thoracic cavity around the lungs

Question 6

What happens to the alveolar pressure during inhalation?

Answer 6

it drops from 760mmHg to 758mmHg, the flow of the air continues until alveolar pressure is restored to 760mmHg

Question 7

What does exhalation involve?

Answer 7

diaphragm and external intercostal muscles relax, decreasing the area of the thoracic cavity

Question 8

What happens to the alveolar pressure during exhalation?

Answer 8

increase in alveolar pressure to 762mmHg within the thoracic cavity and air flows along its gradient until the alveolar pressure reaches 760mmHg

Question 9

What other muscle is used during forced exhalation?

Answer 9

internal intercostal muscles

Question 10

What helps the lungs with the recoiling effect?

Answer 10

elastic nature of the lungs and associated structures

Question 11

What is the oxygen hemoglobin dissociation curve?

Answer 11

represents the percent of total blood hemoglobin that is saturated with oxygen at a given partial pressure of oxygen

Question 12

The higher the partial pressure of oxygen…..

Answer 12

more oxygen combines with hemoglobin

Question 13

Where is the highest percent of saturation of hemoglobin found?

Answer 13

within the blood within the lungs

Question 14

What is blood chemistry influenced by?

Answer 14

heavy carbon dioxide production from aerobic respiration, body temperature, respiration rate, and exposure to high altitude