Match the action with the specific reflex.A reflex that helps prevent falls
A. Withdrawal reflex
B. Reciprocal innervation
C. Crossed extensor reflex
D. Golgi tendon reflex
E. Stretch reflex
Answer: C
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Parasympathetic innervation of the liver occurs through
a) oculomotor (III) nerve (cranial nerve III). b) facial (VII) nerve (cranial nerve VII). c) glossopharyngeal (IX) nerve (cranial nerve IX). d) vagus (X) nerve (cranial nerve X). e) pelvic splanchnic nerve.
Which of the following statements concerning the length-tension relationship of skeletal muscle is incorrect?
a. when a muscle is maximally stretched, it can develop the most tension upon contraction because the thin filaments can slide in a maximal distance. b. maximum tension can be developed if the muscle is at its lowest at the onset of contraction. c. in the body, the relaxed length of muscle is at its optimal length. d. when the initial length of muscle prior to contraction becomes very short, tension is decreased during contraction because of thin filament overlap, because the thick filaments are compressed against the Z lines, and because not as much Ca2+ is released during excitation-contraction coupling. e. the tension that can be achieved during a tetanic contraction is less when a muscle is shorter or longer than its optimal length at the onset of contraction.
A myosin head that is "cocked" and ready to bind to actin is associated with ______.
A. ADP B. Pi C. ATP D. two of the above
When blood vessels become surrounded by concentric lamella forming osteons, the bone will grow in
A. length. B. diameter. C. the epiphyseal plate. D. the articular cartilage. E. all of these areas.