You are walking barefoot and step on a tack with your right foot. All of the following will occur EXCEPT
A) flexor muscles in your right thigh and leg contract to remove your foot
B) reciprocal innervation inhibits extensor muscles in the same limb
C) collaterals of sensory neurons stimulate alpha motor neurons that cause extension in the opposite limb
D) collaterals of interneurons stimulate a crossed extensor reflex
Ans: C) collaterals of sensory neurons stimulate alpha motor neurons that cause extension in the opposite limb
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Only autosomal trisomies involving chromosomes 13, 18, and 21 are survivable. Why is this?
A. These are relatively short chromosomes. B. These are relatively long chromosomes. C. These are relatively gene-poor chromosomes. D. These are redundant chromosomes. E. These chromosomes have no genes.
Which of the following structures contains central pattern generators that help regulate the breathing rhythm?
A. Pons B. Thalamus C. Forebrain D. Cerebellum E. Limbic system
The ischemic phase of the uterine cycle is brought on by vascular spasms, which in turn are a response to what?
A. Ovulation B. Menstruation C. Rising LH level D. Falling progesterone level E. Rising progesterone level
Metabolic rate equals energy expenditure/unit of time
Indicate whether the statement is true or false