Match the term with the correct definition.A. Small change in the resting membrane potential confined to a small areaB. Charge difference across the plasma membrane when the cell is in an unstimulated stateC. Larger change in resting membrane potential that spreads over entire surface of a cellD. Membrane becomes more positive when Na+ diffuse into cellE. Return to the resting membrane potentialLocal potential
Fill in the blank(s) with the appropriate word(s).
Answer: A
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Vern, suffering from cardiac arrhythmias, is brought into the emergency room of a hospital. He begins to exhibit tachycardia and as a result loses consciousness. His anxious wife asks you why he has lost consciousness. What would you tell her?
What will be an ideal response?
A ________, also called a mole, is a harmless, localized overgrowth of melanin-forming cells.
Fill in the blank(s) with the appropriate word(s).
The structure of a capillary wall differs from that of a vein or artery because
A. the capillary wall has only two tunics. B. capillaries have more smooth muscle. C. capillary walls have only endothelium and a basement membrane. D. capillaries can constrict or dilate. E. capillaries are impermeable to all substances.
The pre-embryonic structure that enters the uterus is a fluid-filled ball of cells called a
A. trophoblast. B. blastocyst. C. zygote. D. morula.