Reproductive System

25 July 2022
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37 test answers

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The mechanism that keeps the testes cooler than the body's core temperature is called descent of the testes. T or F
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F
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The scrotum contains the testes and spermatic cords. T or F
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T
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Testosterone stimulates development of the secondary sex characteristics, spermatogenesis, and libido. T or F
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T
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Spermiogenesis is the last stage of meiosis. T or F
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F
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The gene that codes for the testis- determining factor (TDF) is found in or on
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the Y chromosome.
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From their formation to ejaculation, sperm cells take the following pathway:
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seminiferous tubule, rete testis, epididymis, ductus deferens, ejaculatory duct, urethra.
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The blood-testis barrier (14)
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prevents antibodies in the blood from getting to the germ cells.
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When do the testes start secreting testosterone?
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in the first trimester of fetal development
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Testosterone inhibits (16)
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gonadotropin-releasing hormone (GnRH) secretion.
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Changes called male climacteric are a consequence of
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increased secretion of FSH and LH.
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Sperm cells get energy to power their movement from _________ contributed by the ____________.
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fructose; seminal vesicles
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The acrosome contains enzymes used to
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penetrate the egg.
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_________ have 46 chromosomes, whereas _____________ have 23.
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Primary spermatocytes; spermatids
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Sildenafil (Viagra) prolongs erection by
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inhibiting degradation of cGMP
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In the female fetus, the absence of testosterone results in the development of the external genital into clitoris, labia minora, and labia majora. T or F
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T
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The uterus is a thick muscular chamber inferior to the urinary bladder. T or F
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F
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The vagina has no glands but it is moistened by mucus from glands in the cervical canal. T or F
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T
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Although two breast cancer genes are known, most cases are nonhereditary. T or F
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T
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Inhibin modulates the secretion of LH. T or F
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F
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Human chorionic gonadotropin (HCG) stimulates the corpus luteum to grow and secrete estrogen and progesterone. T or F
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T
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Progesterone stimulates uterine contractions. T or F
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F
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Prolactin is secreted during pregnancy to stimulate milk synthesis so that milk will be available by the time the infant is born. T or F
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F
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Oxytocin stimulates contraction of myoepithelial cell of the mammary acini. T or F
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T
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The internal female genitalia include the
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vagina
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Most of the natural lubrication during female sexual excitement is provided by the
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greater vestibular (Bartholin) glands.
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Follicles are located in the
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cortex of the ovary.
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The earliest sign of puberty in girls is
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the onset of breast development.
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The term menstrual cycle specifically refers to
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the cyclic changes in the uterus determined by shifting hormonal changes.
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The ovulated egg is
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a secondary oocyte.
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The ovum finalizes meiosis
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during fertilization.
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Milk ejection, stimulation of nerve endings in the ____________ leads to the release of ______________ from the pituitary.
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nipple and areola; oxytocin
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Why is breast milk superior to cow's milk for an infant?
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Cow's milk has too much protein and minerals in it.
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Neonatal immunity depends on IgG and IgA acquired through the placenta and colostrum, respectively. T or F
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T
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Which of these organ systems faces the greatest physiological challenge in the transitional period after birth?
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respiratory
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Older people may require lower drug doses than younger people because
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they have lower rates of renal clearance.
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Clinical death is widely defined as
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brain death.
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Senescence of the immune system makes older people more subject to cancer and infectious disease because of a decline in
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antigen-presenting cells and helper T cells.