A bundle of axons in the CNS is called a ________.
A. tract
B. neuron
C. bundle
D. nerve
Answer: A
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Secretion of atrial natriuretic peptide
A. increases potassium excretion. B. decreases sodium excretion. C. increases sodium excretion. D. decreases potassium excretion.
The tube that drains bile from the liver is the:
a. common bile duct b. cystic duct c. hepatic duct d. major duodenal papillae
The trigger zone of a neuron includes which of the following?
A. Each myelin sheath gap B. The dendrites C. The axon terminals D. The axon hillock E. Each internodal segment
The fluid-mosaic model of the plasma membrane suggests that
A. proteins are not a part of the membrane. B. proteins form a "liquid" sea in the membrane. C. the membrane is neither rigid nor static in structure. D. phospholipids form a single lipid layer in the center of the membrane. E. cholesterol forms the outermost layer of the membrane.