Quiz 30 i guess

Quiz 30 i guess - Question 3 Multiple Choice 0.5 points The...

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Question 1 Multiple Choice 0.5 points The primary reason steroid hormones usually act slowly is that … they are too large to enter cells and therefore must first bind to a plasma membrane receptor before having an effect on a cell. they turn genes on or off and it takes time for gene products to build up or become depleted. target cells tend to ignore steroid hormones in favor of nonsteroid hormones. acting via second messenger molecules makes for slower responses than does directly interacting with a cell's DNA. they are produced at very low concentrations. Question 2 Multiple Choice 0.5 points Which one of the following hormones is incorrectly paired with its action? ACTH—stimulates the release of glucocorticoids by the adrenal cortex melatonin—affects biological rhythms, seasonal reproduction oxytocin—stimulates uterine contractions during childbirth insulin—stimulates glycogen breakdown in the liver thyroxine—stimulates metabolic processes
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Unformatted text preview: Question 3 Multiple Choice 0.5 points The area where the urethra exits the bladder is surrounded by a thickened layer of smooth muscle known as the bladder neck. Male infertility can be caused by various conditions that prevent the normal contraction of the bladder neck during orgasm. Why would failure of bladder neck contraction during orgasm lead to infertility? The vas deferens cannot transport sperm from the epididymus to the ejaculatory duct. The ducts leading from the seminal vesicles to the ejaculatory duct are blocked. The temperature of the scrotum is too high, impairing spermatogenesis. Semen is pushed upward into the bladder instead of out the penis. The ducts of the bulbourethral glands are blocked. Question 4 Multiple Choice 0.5 points Which of the following structures in men and women are least alike in function or embryological origin? seminiferous tubules & vagina spermatogonia & oogonia vas deferens & oviduct testes & ovaries...
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This note was uploaded on 10/25/2010 for the course BISC 220L taught by Professor Herrera,mcclure during the Spring '07 term at USC.

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