The embryonic germ layer that is the source of connective tissue and muscle is ________.
A. mesoderm
B. ectoderm
C. exoderm
D. neuroectoderm
E. endoderm
Answer: A
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The term used to describe the crossing over of a tract to the side of the nervous system opposite to where the axons originated is
A) decussation. B) contralateral. C) ascending crossovers. D) pyramidal tracts. E) consensual tracts.
__________ usually contain only a single nucleus.
A) Skeletal muscle cells B) Cardiac muscle cells C) Smooth muscle cells D) Both skeletal and cardiac muscle cells E) Both cardiac and smooth muscle cells
To stimulate muscle contraction, acetylcholine is released from the ________ into the synaptic cleft.
A. sarcoplasmic reticulum B. synaptic vesicles C. terminal cisterns D. sarcolemma E. junctional folds
The point of muscle attachment to an immovable or less movable bone is known as the ________
A) innervation B) action C) insertion D) origin