Name the male accessory sexual glands and characterize the organs and their secretions
What will be an ideal response?
The seminal vesicles are paired; the prostate gland is single and surrounds the urethra, just below the bladder. The bulbourethral glands are also paired. All produce alkaline fluid, which helps to neutralize the acidic environment of the vagina.
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Oxytocin and cholecystokinin are transported through the bloodstream and arrive at the uterus at the same time. Oxytocin causes the uterus to contract, whereas cholecystokinin has no effect. Why?
A. The uterus has receptors for oxytocin, but not for cholecystokinin. B. Oxytocin blocks the activity of cholecystokinin. C. Oxytocin alters gene expression patterns, whereas cholecystokinin does not. D. Oxytocin is able to diffuse through the plasma membrane of uterine cells, whereas cholecystokinin cannot. E. Oxytocin is at a higher concentration in the bloodstream than cholecystokinin.
Bacterial ribosomes differ from eukaryotic ribosomes in all of the following except
A. they act as sites of protein synthesis. B. they are smaller than in eukaryotes. C. tetracycline and chloramphenicol can bind to bacterial ribosomes. D. they differ in ribosomal proteins. E. they differ in RNA content.
All cells have a plasma membrane, cytoplasm, and ribosomes.
A. True B. False
A 45× objective and a 10× ocular produce a total magnification of
A. 145×. B. 900×. C. 450×. D. 55×.