Which of the following events in the menstrual cycle occur at the same time?
A. maximal LH secretion and menstruation (menstrual flow)
B. early follicular development in the ovaries and maximum thickening of the uterus
C. ovulation and menstruation (menstrual flow)
D. uterine wall begins to thicken and increased estrogen production by the follicles
E. proliferation and secretion
D
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When an antigen is bound to a Class II MHC protein, it can activate a ________ cell
A) plasma B) helper T C) NK D) suppressor T E) cytotoxic T
When [H+] in the blood increases from the optimum
a. kidney (renal) tubules remove hydrogen ions by tubular secretion. b. kidney tubules retain more potassium ions than what the body needs. c. retained potassium ions adversely affect cardiac functions. d. kidney tubules secrete H+ and absorb K+. e. all of these.
What are nerve endings that respond to tissue injury or noxious stimulation that produce sensations of pain?
A. Tactile corpuscles B. Free nerve endings C. Lamellated corpuscles D. Nociceptors E. Merkel discs
The estrus cycle of a ewe lasts about _________ hours
Fill in the blank(s) with correct word