All but which of the following statements about autorhythmic myocardial cells are correct?
a. They do not maintain a stable resting membrane potential.
b. They have special ion channels in their sarcolemma.
c. They are the first myocardial cells to contract.
d. They make up the intrinsic cardiac conduction system.
Answer: c. They are the first myocardial cells to contract.
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The elevated blood pressure that sometimes accompanies pregnancy is known as
A) preeclampsia. B) reactive hyperemia. C) vasovagal syncope. D) orthostatic hypotension. E) infarction.
It is possible for a person who is experiencing no symptoms of AIDS to carry and transmit HIV to others.?
Indicate whether the statement is true or false
Blood is pumped through the heart by which type of muscle?
A. Skeletal B. Smooth C. Cardiac D. Visceral
Skeletal muscle fibers are formed from embryonic cells called
A) sarcomeres. B) myofibrils. C) myoblasts. D) fascicles. E) myomeres.