In the menstrual cycle, progesterone levels are highest during:
A) the proliferative phase.
B) menses.
C) the secretory phase.
D) ovulation.
E) both b and d
Answer: C) the secretory phase.
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Match each statement with the correct term below.
A. Asthenic B. Sthenic C. Hyposthenic D. Hypersthenic
Sperm are produced in the
A. rete testis. B. epididymis. C. seminal vesicles. D. seminiferous tubules. E. efferent ductules.
In Guillain-Barre syndrome, the immune system attacks and degrades the myelin sheath of PNS axons. Predict the effect this will have on nerve impulse and motor function.
A. Motor signals will not be sent from the brain down the efferent pathway because the brain cannot generate them. B. Lost insulation from myelin will cause neurons of the PNS to be hyper-excitable and muscular spasms will result. C. The brain will slowly degrade and various brain functions will be lost, including motor functions. D. Lost insulation from myelin will cause neurons of the PNS to lose saltatory conduction, resulting in poor muscle function.
Which class of nephron is crucially important in establishing a salt concentration gradient in the kidney so that urine concentration can be regulated?
A. Adrenal nephrons B. Juxtamedullary nephrons C. Cortical nephrons D. Intercalated nephrons