Sympathetic fibers originate from ____________________ and ____________________ spinal nerves
Fill in the blank(s) with correct word
thoracic, lumbar
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If a lever has a fulcrum at one end, a tendon exerting force 5 cm distal to the fulcrum, and resistance at the end opposite to the fulcrum, which of the following is true?
A. It is a first-class lever. B. The mechanical advantage is higher than 1.0. C. It is a third-class lever. D. This joint would use "low-gear" muscles. E. The point of effort will move farther than the point of resistance.
The reticular formation is an area of the brain that
A. is sensory in function. B. is motor in function. C. has sensory and motor components. D. serves higher-order cognitive functions.
A receptor cell
a. is involved in converting stimulus energy into action potentials. b. is specialized to respond to a particular sensory modality. c. can often be found in a sense organ grouped with other cells responsive to the same adequate stimulus. d. all of these. e. none of these.
When compared to the shoulder, the hip joint has
A. a deeper bony socket and stronger supporting ligaments. B. a shallower bony socket but stronger supporting ligaments. C. a shallower bony socket and weaker supporting ligaments. D. a deeper bony socket but weaker supporting ligaments.