Cross bridge interaction between actin and myosin in skeletal muscle is directly blocked by
a. acetylcholine.
b. triads.
c. Z lines.
d. calcium.
e. tropomyosin.
E
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To transmit a nerve impulse, acetylcholine diffuses across a space called the ________ to bind to receptors on the postsynaptic membrane.
Fill in the blank(s) with the appropriate word(s).
When the heart is not ejecting blood into the arterial system, the pressure in the arteries falls to zero as blood drains off into the rest of the vasculature
Indicate whether the statement is true or false
Most carbon dioxide is transported as __________ in the blood.
A) bicarbonate ions B) carbamino compounds (including carbaminohemoglobin) C) dissolved in plasma D) carbon monoxide E) carbonic acid
In a blood smear, the vast majority of formed elements are
A. neutrophils B. red blood cells C. leukocytes D. platelets E. white blood cells