Identify the hormones responsible for short-term regulation of decreasing blood pressure and blood volume
A) ADH and aldosterone
B) aldosterone and cortisol
C) epinephrine and norepinephrine
D) natriuretic peptides
E) erythropoietin and thrombopoietin
Answer: C
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During muscle contraction, myosin heads attach to actin and thereby form connections called ________.
Fill in the blank(s) with the appropriate word(s).
The area of a myofibril where there are no actin filaments is the
A) H band. B) M line. C) I band. D) Z line. E) A band
Smooth muscle cells
A) have to be innervated by motor neurons. B) are larger than cardiac muscle cells. C) are multinucleate. D) contain intercalated discs. E) are spindle-shaped.
In humans, the large vessel that drains blood from the head, neck, and upper limbs is called the ________ vena cava; in pigs this vessel is called the ________ vena cava
A) superior; anterior B) superior; inferior C) inferior; posterior D) inferior; superior E) inferior; anterior