The regulatory protein that blocks the myosin binding site on G actin molecules is ________.
Fill in the blank(s) with the appropriate word(s).
tropomyosin
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Which of the following statements about membrane potentials in different types of cardiac cells is TRUE?
A. Voltage-gated transient (T-type) Ca2+ channels are present in all of the different types of cells of the heart. B. Myocardial cells have a resting membrane potential of about -90 mV; pacemaker cells do not have a true resting membrane potential. C. There are no L-type Ca2+ channels in cardiac muscle cells. D. The upstroke of the action potential is steeper in SA node cells than it is in Purkinje cells. E. Once threshold depolarization is reached in both myocardial and pacemaker cells, the rapid upswing of the action potential is caused by the opening of voltage-gated Na+ channels
Sustained fevers that are 1°C above normal core body temperature usually lead to irreversible brain damage.
Answer the following statement true (T) or false (F)
Which of the following would you observe in a patient with a tumor of the cerebellum?
A. Loss of general sensation B. No heartbeat C. No conscious thought D. Increased sex drive E. Balance impairment
The near point of vision decreases with increasing age.
Answer the following statement true (T) or false (F)