Some people justify their smoking habit by saying that smoking calms them down. Is this justification correct physiologically?
A) Yes, because like caffeine, nicotine decreases heart rate.
B) Yes, because nicotine acts very much like norepinephrine.
C) No, because nicotine has a stimulatory effect on heart rate.
D) No, because nicotine acts very much like acetylcholine.
E) No, because smoking has no physiological effect in general.
C) No, because nicotine has a stimulatory effect on heart rate.
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The partial pressure of oxygen in arterial blood is approximately ________ mm Hg.
A) 45 B) 100 C) 50 D) 40 E) 70
Sacs of fat contained within the serosa of the colon are called _______.
What will be an ideal response?
Shannon, a boxer, is informed after a fight that she has a broken ethmoid bone. Due to its location she may have difficulty with which of these special senses?
A. Smell B. Equilibrium C. Hearing D. Vision
In internal respiration, oxygen is diffusing from the
A. capillaries into the venules. B. trachea to the lungs. C. tissue fluid into the capillary blood. D. alveoli into the capillary blood. E. capillary blood into the tissue fluid.