Respiratory: Definitions - 15.3 Gas Exchange and Transport

Question 1

Normal body pH

Answer 1

7.35 – 7.45

Question 2

Acidosis

Answer 2

Blood pH below 7.35

Question 3

Alkalosis

Answer 3

Blood pH above 7.45

Question 4

Alveolar exchange

Answer 4

Exchange of oxygen and carbon dioxide between alveoli and pulmonary capillaries.

Question 5

Bicarbonate ion

Answer 5

A negative charged ion – HCO3-. Serves as a buffer by reducing acids present in the bloodstream.

Question 6

Blood capillaries

Answer 6

The smallest (very narrow) blood vessels responsible for exchange of nutrients, blood gases, and wastes.

Question 7

Diffusion

Answer 7

Movement of molecules from its high concentration to its low concentration using kinetic energy (free energy)

Question 8

Gas exchange

Answer 8

Oxygen and Carbon dioxide exchange places.

Question 9

Lumen

Answer 9

The empty portion of a hollow tube or passageway such as a blood vessel, bronchial, digestive tract.

Question 10

Oxyhemoglobin

Answer 10

Hemoglobin bound oxygen. Each molecule of hemoglobin can bind up to 4 oxygen molecules.

Question 11

Pulmonary capillaries

Answer 11

Small, narrow capillary beds that surround each alveolus.

Question 12

Respiratory membrane

Answer 12

A very, very thin membrane that is between each pulmonary alveolus and its pulmonary capillaries. Capable of gas exchange.

Question 13

Simple squamous epithelium

Answer 13

Single layer of squamous cells that allow for diffusion.

Question 14

Systemic capillaries

Answer 14

Small, narrow blood vessels that are located in the tissues. Specialize in exchange with tissues.

Question 15

Systemic exchange

Answer 15

Exchange of oxygen and carbon dioxide at the tissues.