The placenta protects the developing fetus from harmful substances like alcohol or drugs.
Answer the following statement true (T) or false (F)
False
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Freshwater fish reside in hypotonic environments. They do not drink water, and they excrete large volumes of hypotonic urine in an effort to osmoregulate. How do they obtain an adequate supply of electrolytes?
A) The rectal gland is specialized to produce the dilute (hypotonic) urine and conserve ions. B) Chloride cells transport additional electrolytes into the circulation of these organisms. C) Gill filaments take up additional electrolytes from freshwater. D) There is an increase in Na+/K+-ATPase activity across the basolateral membrane.
Which of the following structures in males is shared by both the urinary and reproductive systems?
a. urinary bladder b. prostate gland c. ureter d. vas deferens e. urethra
If you were diagnosing a case of infertility in a male patient, and you found that his sperm failed to swim as a result of inactivation, you would diagnose a problem in the
A. bulbourethral gland. B. seminal vesicle. C. prostate gland. D. vas deferens. E. epididymis.
The ____ secretes melatonin, a hormone that promotes sleep in human beings
a. pineal gland b. suprachiasmatic nucleus c. crepuscular gland d. biological clock e. hypothalamus