Discuss a way in which the opposing ANS systems cooperate with each other.
What will be an ideal response?
Prior to and during intercourse the parasympathetic system causes erection in the male penis and female clitoris. During the climax the sympathetic system causes ejaculation of semen by the penis and reflex peristalsis of the vagina.
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A common cause of dandruff is
A) inflammation around sebaceous glands. B) lack of sebaceous glands. C) too many sebaceous glands. D) inactive apocrine glands. E) inactive eccrine glands.
Match the type of signal to its description (answers may be used more than once).
1. may be hyperpolarizing 2. originate(s) at the trigger zone 3. originate(s) on dendrites and cell bodies 4. can involve ion channels regulated by chemicals 5. require(s) a minimum stimulus to occur 6. size increases if stimulus strength increases 7. result(s) from influx of sodium A. graded potential B. action potential C. both
Within smooth muscle cells, intermediate filaments are linked by dense ________ at points where they attach on the inner surface of the cell membrane.
Fill in the blank(s) with the appropriate word(s).
Which of the following is linked with many cases of cervical cancer?
A) gonorrhea B) trichomoniasis C) human papillomavirus (HPV) D) chlamydia