What hormone(s) inhibit(s) the secretion of FSH and LHÂ during the female sexual cycle?
A. Estradiol and progesterone
B. GnRH
C. Androgens
D. Progesterone
E. Estradiol
Answer: A
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In an adult, the conus medullaris is found at about
A) T6. B) T10. C) L1. D) L5. E) Co1.
The ________ raises your eyebrow.
A. zygomaticus B. masseter C. orbicularis oculi D. frontalis
Based on stimulation studies, the "headquarters" of the reticular activating system appears to be based in the
A) medulla. B) pons. C) midbrain. D) diencephalon. E) cerebrum.
Which statement regarding the relaxation phase of a muscle twitch is true?
A) The phase begins at stimulation and typically lasts about two milliseconds. B) Muscle tension falls to resting levels. C) The action potential sweeps across the sarcomere during this period. D) Tension rises to a peak. E) Cross-bridges are interacting with active sites on actin filaments throughout this period.