Respiration

Question 1

Alveoli

Answer 1

Location of gas exchange

Question 2

Deoxygenated blood enters via

Answer 2

pulmonary arteries

Question 3

CO2 diffuses from the _____ to the _____ and is ____

Answer 3

capillaries, alveoli, exhaled

Question 4

O2 diffuses from the _____ to the ____ and is _____

Answer 4

alveoli, capillaries, bound to hemoglobin and returned to heart

Question 5

Fetal hemoglobin has a _____ affinity for O2 than HbA

Answer 5

higher

Question 6

Gas and nutrient exchange occurs across the _____ in fetal respiration

Answer 6

placenta

Question 7

Pathway of Air

Answer 7

external nares - nasal cavity - pharynx- larynx - trachea- bronchi - bronchioles - alveoli

Question 8

Surfacant

Answer 8

cover alveoli to decrease surface tension and maintian shape

Question 9

Pleurae Around the Lungs

Answer 9

Visceral Pleura: internal

Parietal Pleura: external

Question 10

Diaphragm is under control of:

Answer 10

Somatic control

Question 11

Inhalation

Answer 11

diaphragm flattens, chest wall expands, intrathoracic volume increases causing the intrapleural space to increase in volume (therefore decreasing pressure), this causes the lungs to expand in fill the space and air rushes in due to the differences in partial pressure (low in lung, high in atmosphere)

Question 12

Exhalation

Answer 12

diaphragm relaxes and the chest cavity volume decreases, therefore increasing the pressure in the intrapleural space and causing the lungs to release air to bring pressure to equilibrium

Question 13

Bicarbonate Buffer Equation

Answer 13

CO2 + H20 H2CO3 H+ + HCO3-

Question 14

When [H+] is high

Answer 14

Acidic, pH low

respiratory rate increases to shift bicarbonate buffer system to the left

Question 15

When [H+] is low

Answer 15

Basic, pH high

Respiratory rate slows to shift bicarbonate buffer system to the right