The patellar or knee-jerk reflex involves ________
A) stimulatory nerve impulses to both quadriceps and the hamstrings
B) inhibitory nerve impulses to both quadriceps and the hamstrings
C) stimulatory nerve impulses to the quadriceps and inhibitory impulses to the hamstrings
D) stimulatory nerve impulses to the hamstrings and inhibitory impulses to the quadriceps
Answer: C
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Answer the following statements true (T) or false (F)
1. Dynamic loading during gymnastics has been show to affect bone size and strength more than muscle mass. 2. The effects of several months intervention treatment with whole body vibration appear to include improved bone mineral density. 3. The link between cessation of menses and osteoporosis is estrogen deficiency. 4. In practical terms, a fast childhood game of hopscotch favors bone building over a very slow one. 5. Long distance runners have a much higher prevalence of secondary amenorrhea than the general population.
A DNA sequence AACGGTGCACCACGG encodes an mRNA of sequence
A) UUGCCACGUGGUGCC. B) UUCGGAGCUCCUCGG. C) AACGGTGCACCACGG. D) AACGGUGCACCACGG.
One method by which cytotoxic T cells destroy their target cells is by releasing substances that
A) increase protein production. B) enhance ribosomal activities. C) suppress the antigen recognition process. D) rupture cell membranes. E) produce memory T cells.
What provides a link between the nervous system and the endocrine system?
A) cerebellum B) thalamus C) pons D) hypothalamus