This figure shows the muscles of facial expression. What muscle does number 5 indicate?
A. Zygomaticus major
B. Risorius
C. Masseter
D. Buccinator
E. Orbicularis oris
D
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Which of the following statements about spermatogenesis is not true?
A) The spermatogonium forms the primary spermatocyte. B) The primary spermatocyte forms two secondary spermatocytes. C) The secondary spermatocytes each form two spermatids. D) Each spermatid forms two sperm.
What is/are the function(s) of inhibin?
A. inhibits secretion of FSH from the anterior pituitary gland
B. inhibits secretion of luteinizing hormone from the anterior pituitary gland
C. inhibits secretion of estrogen from the ovaries
D. All of the choices are functions of inhibin.
Which type of membrane channels are found in axons?
A) voltage-gated Na+ channels B) voltage-gated K+ channels C) chemically gated Na+ and K+ channels D) voltage-gated Ca2+ channels E) voltage-gated Na+ and K+ channels
The number of ganglia that may be associated with motor neurons of the somatic nervous system is
A. 1. B. 3. C. 0. D. 4. E. 2.