Exam 49: Animal Reproduction

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One secondary spermatocyte ultimately produces ____ mature sperm.

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B

Individuals change from one sex to the other in ____.

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B

In the female reproductive cycle, the endometrium is thickest ____.

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E

In ____, a new individual grows and develops while attached to the parent.

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Match each hormone with its correct description.
estrogen
triggers ovulation; stimulates Leydig cells in the testes to secrete testosterone
follicle stimulating hormone (FSH)
secreted by follicular cells; stimulates the growth of a new endometrium
inhibin
secreted by the developing embryo; maintains function of the corpus luteum
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Premises:
Responses:
estrogen
triggers ovulation; stimulates Leydig cells in the testes to secrete testosterone
follicle stimulating hormone (FSH)
secreted by follicular cells; stimulates the growth of a new endometrium
inhibin
secreted by the developing embryo; maintains function of the corpus luteum
relaxin
induces contraction of the uterus
progesterone
stimulates oocytes in the ovaries to begin meiosis; stimulates Sertoli cells in the testes to secrete molecules needed for spermatogenesis
testosterone
secreted by Leydig cells; stimulates spermatogenesis and controls the growth and function of male reproductive structures
luteinizing hormone (LH)
stimulates growth of the uterine lining and inhibits contractions of the uterus
gonadotropin releasing hormone (GnRH)
secreted by the corpus luteum and helps maintain the endometrium; secreted by Sertoli cells and inhibits FSH secretion by the anterior pituitary
oxytocin
secreted by the corpus luteum even after it regresses later in pregnancy; blocks uterine contractions until the time of birth is near
human chorionic gonadotropin (hCG)
secreted by the hypothalamus; stimulates the release of FSH and LH from the anterior pituitary
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The palolo worm reproduces by ____ reproduction, and its biological clock is timed by ____.

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Asexual reproduction can involve ____.

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Menstrual flow results in the discharge of ____.

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Oviparous animals ____.

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Which mechanism(s) increase(s) genetic diversity?

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The presence of both male and female reproductive tissue in the same individual is termed ____.

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The "pill" works primarily by ____.

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Recent research has indicated that for human _____, vocal pitch changes may be associated with fertility.

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Investigators who study sea urchins, amphibians, and humans have reported that ____.

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Menstruation begins in response to ____.

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Which condition favors sexual reproduction over asexual reproduction?

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Identify each labeled part of the following illustration.
Identify each labeled part of the following illustration.
testis
b
urethra
e
epididymis
i
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Responses:
testis
b
urethra
e
epididymis
i
urinary bladder
c
rectum
f
seminal vesicle
d
vas deferens
j
prostate gland
a
bulbourethral gland
g
scrotum
h
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The morning-after pill works by ____.

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Which contraception technique consists of avoiding intercourse during the time of the cycle when the egg can be fertilized?

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Vasectomy causes sterility because ____.

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