The central, raised area of the breast where the newborn suckles is called the
A) lactirferous duct.
B) areola.
C) nipple.
D) fornix.
E) lactiferous sinus.
B) areola.
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The cardiac muscle
a. extracts oxygen and nutrients from the blood within its chambers b. receives its blood supply primarily during ventricular systole when blood is forced into coronary arteries c. receives its blood supply directly from the pulmonary circulation as all of this blood passes through the coronary circulation d. receives most of its blood supply during ventricular diastole by means of coronary arteries e. does not receive blood in any of the ways mentioned above
The sympathetic postganglionic fibers that innervate the sweat glands secrete acetylcholine rather than norepinephrine
Indicate whether the statement is true or false
The sodium-potassium pump helps to maintain the concentration gradients for sodium and potassium ions across the plasma membrane. Select the true statement regarding the sodium-potassium pump.
A)For each molecule of ATP used, the pump moves two negatively charged potassium ions out of the cell. B)For each molecule of ATP used, the pump moves three positively charged sodium ions out of the cell. C)For each molecule of ATP used, the pump moves three positively charged potassium ions out of the cell. D)For each molecule of ATP used, the pump moves two negatively charged sodium ions into the cell.
The buildup of depolarization when EPSPs arrive in rapid succession is called ________ summation
A) threshold B) spatial C) temporal D) chemical E) electrical