There is an oxygen molecule in the sheep's primary bronchus. What structure would it enter next?
A) Respiratory bronchiole
B) Terminal bronchiole
C) Alveolus
D) Secondary bronchus
Answer: B
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2,3-diphosphoglycerate
a. is produced within red blood cells b. production is inhibited by HbO2 c. concentration gradually increases when Hb in the arterial blood is chronically undersaturated d. can bind with Hb e. has all of the above characteristics
Hypercapnia
a. refers to excess CO2 in the arterial blood b. occurs when CO2 is blown off to the atmosphere at a rate faster than it is being produced by the tissues c. may be caused by hypoventilation d. would likely result in a higher percent saturation of oxygen on Hb e. would tend to raise the blood's pH
Olfactory cells are normally stimulated by ________
A) movement of a cupula B) stretching of stretch receptors C) the movement of otoliths D) airborne molecules
The toxin of Clostridium tetani travels within somatic motor neurons and effects the functioning of their presynaptic neurons. What effect does this have on smooth muscle?
A. Flaccid paralysis B. Spastic paralysis C. Lockjaw D. No effect