gas exchange in humans

Question 1

What is the primary function of the respiratory system in humans?

Answer 1

To facilitate gas exchange, primarily oxygen and carbon dioxide.

Question 2

True or False: Gas exchange occurs in the alveoli of the lungs.

Answer 2

True

Question 3

Fill in the blank: The process of inhalation brings _____ into the lungs.

Answer 3

oxygen

Question 4

What gas is primarily expelled during exhalation?

Answer 4

Carbon dioxide

Question 5

What are the tiny air sacs in the lungs called?

Answer 5

Alveoli

Question 6

Multiple choice: Which of the following is NOT a part of the respiratory system? A) Lungs B) Heart C) Trachea D) Bronchi

Answer 6

B) Heart

Question 7

Describe the role of hemoglobin in gas exchange.

Answer 7

Hemoglobin binds to oxygen in the lungs and transports it to tissues, while also carrying carbon dioxide back to the lungs.

Question 8

What is the term for the movement of oxygen from the alveoli into the blood?

Answer 8

Diffusion

Question 9

True or False: The diaphragm is a muscle that assists in breathing.

Answer 9

True

Question 10

What is the main muscle involved in the process of inhalation?

Answer 10

Diaphragm

Question 11

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

Answer 11

diffusion

Question 12

What is the role of surfactant in the alveoli?

Answer 12

To reduce surface tension and prevent alveolar collapse.

Question 13

Multiple choice: Which part of the brain regulates the rate of breathing? A) Cerebrum B) Medulla oblongata C) Cerebellum D) Thalamus

Answer 13

B) Medulla oblongata

Question 14

What is the significance of partial pressure in gas exchange?

Answer 14

It determines the direction of gas movement between the alveoli and blood.

Question 15

True or False: Oxygen is more soluble in blood than carbon dioxide.

Answer 15

False

Question 16

What is the primary method of carbon dioxide transport in the blood?

Answer 16

As bicarbonate ions (HCO3-)

Question 17

Fill in the blank: The respiratory system works closely with the _____ system to maintain homeostasis.

Answer 17

circulatory

Question 18

What is the term for the total amount of air that can be exhaled after a deep inhalation?

Answer 18

Vital capacity

Question 19

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

Answer 19

C) Carbon Dioxide

Question 20

What are the primary respiratory structures involved in gas exchange?

Answer 20

Alveoli and capillaries

Question 21

True or False: Gas exchange can occur in the bronchi.

Answer 21

False

Question 22

What condition can result from impaired gas exchange in the lungs?

Answer 22

Hypoxemia

Question 23

Fill in the blank: The _____ is the tube that carries air to the lungs.

Answer 23

trachea

Question 24

What is the effect of high altitude on gas exchange?

Answer 24

Reduced oxygen availability can lead to hypoxia.

Question 25

Multiple choice: Which of the following diseases affects gas exchange? A) Asthma B) Diabetes C) Hypertension D) Osteoporosis

Answer 25

A) Asthma

Question 26

What is the role of the pleura in the respiratory system?

Answer 26

To provide a lubricated surface for lung movement within the thoracic cavity.

Question 27

True or False: Gas exchange is an active process that requires energy.

Answer 27

False

Question 28

What is the primary gas exchanged during photosynthesis?

Answer 28

Carbon dioxide

Question 29

Fill in the blank: The exchange of gases in the tissues is known as _____ respiration.

Answer 29

internal

Question 30

What happens to the diaphragm during exhalation?

Answer 30

It relaxes and moves upward.

Question 31

Multiple choice: Which factor does NOT affect the rate of gas exchange? A) Surface area B) Temperature C) Color of the lungs D) Partial pressure

Answer 31

C) Color of the lungs

Question 32

What condition describes an increased level of carbon dioxide in the blood?

Answer 32

Hypercapnia