Cardiac muscle fibers form extensive connections with one another at specialized regions called ________.
Fill in the blank(s) with the appropriate word(s).
intercalated discs
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Which of the following is true regarding red blood cells?
A) They are anucleate. B) They survive for approximately one year. C) They have a biconvex shape. D) They are produced in the spleen. E) They primarily carry carbon dioxide.
Most commonly, which cerebral hemisphere is responsible for controlling speech?
A. Left B. Right
IL-1 release by immune cells results in the secretion of glucocorticoids such as cortisol. Cortisol, in turn,
a. mobilizes amino acids. b. mobilizes energy reserves and enhances immune function by making more energy available. c. suppresses immune function. d. mobilize energy reserves and suppress immune function. e. does all of these.
A neuron receives a stimulus. Which of the following events happens next?
A. Repolarization of the membrane B. A resting membrane potential is established C. Threshold is reached D. Hyperpolarization of the membrane E. A local potential develops