When necessary, blood bypasses a capillary bed through
A) an arterial anastomosis.
B) venous valves.
C) arteriovenous anastomoses.
D) precapillary sphincters.
E) venules.
C) arteriovenous anastomoses.
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________ is the main form in which Carbon dioxide is carried in the blood
A- Carbonic anhydrase B- Carbonic acid C- Carbon dioxide D- Bicarbonate ion
What effect would lesions in the cervical ganglia and upper spinal cord that interrupt sympathetic innervation of the head have?
A. Increased blood supply to the digestive tract B. Decreased rate and force of the heart beat C. Decreased production of epinephrine and norepinephrine D. Decreased upper limb perspiration and inability to produce "goose bumps" E. Constriction of the pupil and decreased facial perspiration
An increase in the numbers of red blood cells that makes the blood too viscous is
A. hemorrhagic anemia. B. polycythemia. C. hemolytic anemia. D. pernicious anemia.
All of the following have the stratum lucidum layer of the epidermis except which one?
A. Thin skin B. Skin with no hair C. Thick skin D. Skin on the palms of hands