Inhibitory postsynaptic potentials (IPSPs) are associated with which of the following?
A) No change in the cell membrane potential
B) Depolarization of the cell membrane
C) No change of the threshold
D) Hyperpolarization of the cell membrane
E) Repolarization of the cell membrane
D
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The range of human hearing is about
A. 2-2,000 vibrations per second. B. 20-20,000 vibrations per second. C. 2,000-200,000 vibrations per second. D. 2,000-3,000 vibrations per second.
Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute
A) 20-40 B) 40-60 C) 80-100 D) 100-140 E) 140-180
The path that fluid takes as it enters a lymphatic capillary is through
A. spaces between capillary endothelial cells that are arranged as one-way flaps. B. active transport protein pumps on endothelial cell membranes. C. pores (fenestrations) in the cells of the capillary wall. D. vesicles that move the fluid across the cell (transcytosis). E. cell membrane leakage channels that allow diffusion.
Laparoscopic banding is a procedure in which
A. small incisions allow shortening of the small intestine. B. the jejunum is connected to the esophagus. C. a tight band is placed around the stomach. D. a band of artificial tissue is implanted in the duodenum to decrease intestinal absorption.