lab 6

Question 1

metabolizing cells involves

Answer 1

supplying O2 and removing CO2

Question 2

alveoli

Answer 2

series of tubes that branch and terminate as clusters of small membraneous air sacs

Question 3

factors that influence diffusion of gases between lungs and blood

Answer 3

• amount of respiratory surface area
• diffusion distance
• concentration gradient

Question 4

High concentration gradient ensured by

Answer 4

movement of blood w/ low O2 and high CO2 levels to the lungs
pulmonary ventilation(maintains high level of O2 and lower levels of CO2 in air)

Question 5

tidal volume

Answer 5

amount of air that moves in and out of the lungs during one breathing cycle

Question 6

inspiratory reserve volume

Answer 6

maximal volume of air that can be inhaled after normal inspiration

Question 7

expiratory reserve volume

Answer 7

the maximal amount of air that can be expelled from the lungs after normal expiration

Question 8

residual volume

Answer 8

the amount of air left in the lungs after a forced exhalation

Question 9

vital capacity

Answer 9

the maximal volume of air that can be exchanged during a single breathing cycle

Question 10

what regulates the tidal volume and breathing rate

Answer 10

the respiratory center in the medulla oblongata

Question 11

peripheral chemoreceptors

Answer 11

detect blood pH, O2 and CO2 levels

Question 12

stretch receptors in lungs

Answer 12

provide important sensory information to modulate activity of respiratory center neurons

Question 13

spirometer

Answer 13

measures the quantity of air exchanged during lung ventilation

Question 14

actual spirometry measurments of lung volumes

Answer 14

compared to predicted values

- within 20% considered normal