Suzie wants to protect virgin forests from destruction. She climbs a tree to prevent loggers from cutting the oldest tree in the forest. Suzie did not eat for twelve hours until a friend, Jammie, took over the vigilance. Match the correct levels of blood glucose concentration, blood insulin concentration and relative membrane insulin receptor concentration for a skeletal muscle cell 20 hours into
Jammie's fast and one hour after Suzie had eaten a peanut butter and banana sandwich and a bowl of sweet potato soup.
Plasma Glucose: 90 mg/dl; 125 mg/dl
Plasma Insulin: 10iuU/ml (70 pmol/L); 40iuU/ml (280 pmol/L)
Relative membrane insulin receptor concentration: increasing (high); decreasing (low)
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A class of lipids used as chemical messengers, to signal cells to undergo changes, is called
A) polysaccharides. B) phospholipids. C) triglycerides. D) steroids. E) monoglycerides.
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).
Beta-blockers (beta-adrenergic blocking agents) are frequently used to
A. cause vasoconstriction. B. block muscarinic receptors. C. dilate the pupils of the eye. D. prevent increases in heart rate. E. prevent decreases in heart rate.
________ play an important role in cell division, and they are made of ________
A) Ribosomes; intermediate filaments B) Centrioles; microtubules C) Nucleoli; microfilaments D) Inclusions; centrosomes E) Mitochondria; microtubules