Gas Transport/Exchange

Question 1

What is the primary gas transported by red blood cells?

Answer 1

Oxygen

Question 2

True or False: Carbon dioxide is primarily transported in the blood as bicarbonate ions.

Answer 2

True

Question 3

Fill in the blank: The exchange of gases in the lungs occurs in the _____.

Answer 3

Alveoli

Question 4

What protein in red blood cells binds to oxygen?

Answer 4

Hemoglobin

Question 5

Which part of the respiratory system is responsible for gas exchange?

Answer 5

Lungs

Question 6

Multiple Choice: What percentage of oxygen is typically transported bound to hemoglobin in the blood? A) 10% B) 20% C) 97% D) 50%

Answer 6

C) 97%

Question 7

What is the main function of the respiratory system?

Answer 7

To facilitate gas exchange between the body and the environment

Question 8

True or False: The partial pressure of a gas affects its diffusion across membranes.

Answer 8

True

Question 9

Fill in the blank: The process by which oxygen moves from the alveoli into the blood is called _____ diffusion.

Answer 9

Simple

Question 10

What is the role of surfactant in the lungs?

Answer 10

To reduce surface tension in the alveoli

Question 11

Multiple Choice: Which gas is a byproduct of cellular respiration? A) Oxygen B) Nitrogen C) Carbon Dioxide D) Hydrogen

Answer 11

C) Carbon Dioxide

Question 12

What is the term for the volume of air inhaled or exhaled in a normal breath?

Answer 12

Tidal volume

Question 13

True or False: The diaphragm contracts during inhalation.

Answer 13

True

Question 14

Fill in the blank: The main artery that carries oxygenated blood from the heart to the body is the _____ artery.

Answer 14

Aorta

Question 15

What is the term for the exchange of gases between blood and tissues?

Answer 15

Internal respiration

Question 16

Multiple Choice: Which structure regulates the rate of breathing? A) Medulla Oblongata B) Cerebellum C) Thalamus D) Pons

Answer 16

A) Medulla Oblongata

Question 17

What is the effect of high altitude on oxygen transport?

Answer 17

Reduced oxygen availability and potential hypoxia

Question 18

True or False: Hemoglobin can carry both oxygen and carbon dioxide.

Answer 18

True

Question 19

Fill in the blank: The process of breathing in is called _____ and breathing out is called _____

Answer 19

Inhalation; Exhalation

Question 20

What is the significance of the oxygen-hemoglobin dissociation curve?

Answer 20

It illustrates how readily hemoglobin binds to and releases oxygen under varying conditions.

Question 21

Multiple Choice: What is the primary driver of respiration? A) Blood pressure B) Carbon dioxide levels C) Oxygen levels D) pH levels

Answer 21

B) Carbon dioxide levels

Question 22

What condition is characterized by difficulty in breathing due to narrowed airways?

Answer 22

Asthma

Question 23

True or False: The lungs are located in the thoracic cavity.

Answer 23

True

Question 24

Fill in the blank: The small air sacs in the lungs where gas exchange occurs are called _____.

Answer 24

Alveoli

Question 25

What is the role of the pulmonary veins?

Answer 25

To carry oxygenated blood from the lungs to the heart

Question 26

Multiple Choice: Which gas law explains the relationship between pressure and volume of gases? A) Charles's Law B) Boyle's Law C) Avogadro's Law D) Dalton's Law

Answer 26

B) Boyle's Law