Which of the following best describes the orbicularis oris?.
A) It closes, purses, and protrudes the lips.
B) It pulls the lower lip down and back.
C) It draws the eyebrows together.
D) It allows blinking, squinting, and various other protective mechanisms for the eye.
A) It closes, purses, and protrudes the lips.
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The primary function of adrenocorticotropic hormone (ACTH) is to
A. regulate salt and water balance by acting on the renal system. B. stimulate glucocorticoid release from the adrenal glands. C. stimulate adrenaline release from the adrenal medulla. D. stimulate cell growth and cell division in muscle and bone. E. stimulate the development of the folds on the surface of the brain.
Which of the following is not a synovial joint?
A) Hinge B) Condylar C) Symphysis D) Ball-and-socket
Which of the following tubes has both reproductive and urinary functions?
A) ejaculatory duct B) epididymis C) ductus deferens D) urethra
Which of the following represents a female zygote?
A. XY B. XX C. X D. Y