Question 1

A male's "primary" sex characteristics include

Accepted Answer

A)  deepening of the voice at puberty.
B)  embryonic differentiation of the seminal vesicles.
C)  growth of skeletal muscle.
D)  elongation of the skeleton prior to puberty.
E)  onset of growth of facial hair at puberty.F) B) and D)
G) C) and E)

Question 2

For the 10 days following ovulation in a nonpregnant menstrual cycle, the main source of progesterone is the

Accepted Answer

A)  adrenal cortex.
B)  anterior pituitary.
C)  corpus luteum.
D)  developing follicle.
E)  placenta.F) A) and D)
G) A) and B)

Question 3

The use of birth-control pills (oral contraceptives)

Accepted Answer

A)  reduces the incidence of ovulation.
B)  prevents fertilization by keeping sperm and egg physically separated by a mechanical barrier.
C)  prevents implantation of an embryo.
D)  prevents sperm from exiting the male urethra.
E)  prevents oocytes from entering the uterus.F) A) and E)
G) A) and B)

Question 4

A function-disrupting mutation in the progesterone receptor gene would likely result in

Accepted Answer

A)  the absence of secondary sex characteristics.
B)  the absence of pituitary gonadotropin hormones.
C)  the inability of the uterus to support pregnancy.
D)  enlarged and hyperactive uterine endometrium.
E)  the absence of mammary gland development.F) A) and D)
G) A) and C)

Question 5

Vasectomy

Accepted Answer

A)  eliminates spermatogenesis.
B)  eliminates testosterone synthesis.
C)  prevents implantation of an embryo.
D)  prevents sperm from exiting the male urethra.
E)  prevents oocytes from entering the uterus.F) D) and E)
G) B) and E)

Question 6

Which statement is False concerning reproduction in invertebrate animals?

Accepted Answer

A)  Separate sexes are not observed among any invertebrates.
B)  Some have both sexes within one individual organism.
C)  Some utilize external fertilization.
D)  Some utilize internal fertilization.
E)  None of the invertebrates have structures that store sperm.F) C) and D)
G) B) and E)

Question 7

Which of the following characterizes parthenogenesis?

Accepted Answer

A)  An individual may change its sex during its lifetime.
B)  Specialized groups of cells grow into new individuals.
C)  An organism is first a male and then a female.
D)  An egg develops without being fertilized.
E)  Both mates have male and female reproductive organs.F) C) and D)
G) A) and D)

Question 8

Tubal ligation

Accepted Answer

A)  reduces the incidence of ovulation.
B)  prevents fertilization by preventing sperm from entering the uterus.
C)  prevents implantation of an embryo.
D)  prevents sperm from exiting the male urethra.
E)  prevents oocytes from entering the uterus.F) All of the above
G) D) and E)

Question 9

If you observe vertebrate organisms with parthenogenetic reproduction, internal development of embryos, and the lack of parental care for its young, you should categorize these organisms as

Accepted Answer

A)  earthworms.
B)  lizards.
C)  birds.
D)  frogs.
E)  mammals.F) A) and B)
G) B) and E)

Question 10

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in

Accepted Answer

A)  their nests.
B)  the abdominal tract.
C)  the cloaca.
D)  the uterus.
E)  the spermatheca.F) A) and D)
G) C) and D)

Question 11

A primary response by the Leydig cells in the testes to the presence of luteinizing hormone is an increase in the synthesis and secretion of

Accepted Answer

A)  inhibin.
B)  testosterone.
C)  oxytocin.
D)  prolactin.
E)  progesterone.F) B) and C)
G) A) and C)

Question 12

In humans, the follicular cells that remain behind in the ovary following ovulation become

Accepted Answer

A)  ovarian endometrium shed at the time of menses.
B)  a steroid-hormone synthesizing structure called the corpus luteum.
C)  the thickened portion of the uterine wall.
D)  swept into the fallopian tube.
E)  the placenta, which secretes cervical mucus.F) A) and C)
G) B) and D)

Question 13

Among these contraception methods, which has the highest risk of accidental pregnancy?

Accepted Answer

A)  diaphragm
B)  condom
C)  coitus interruptus
D)  vasectomy
E)  rhythm methodF) A) and E)
G) All of the above

Question 14

Which of the following is not properly paired?

Accepted Answer

A)  seminiferous tubule-cervix
B)  Sertoli cells-follicle cells
C)  testosterone-estradiol
D)  labia majora-scrotum
E)  vas deferens-oviductF) D) and E)
G) A) and B)

Question 15

Internal and external fertilization both

Accepted Answer

A)  produce zygotes.
B)  occur only among invertebrates.
C)  occur only among terrestrial animals.
D)  depend on the use of intromittent copulatory organs.
E)  occur only among birds.F) B) and E)
G) B) and D)

Question 16

In male mammals, excretory and reproductive systems share

Accepted Answer

A)  the testes.
B)  the urethra.
C)  the urinary duct.
D)  the vas deferens.
E)  the prostate.F) A) and D)
G) C) and D)

Question 17

For normal human fertilization to occur,

Accepted Answer

A)  many ova must be released.
B)  the uterus must be enlarged.
C)  only one sperm need penetrate one egg.
D)  secretion of pituitary FSH and LH must decrease.
E)  the secondary oocyte must implant in the uterus.F) A) and C)
G) C) and E)

Question 18

The surgical removal of the seminal vesicles would likely

Accepted Answer

A)  cause sterility because sperm would not be produced.
B)  cause sterility because sperm would not be able to exit the body.
C)  greatly reduce the volume of semen.
D)  enhance the fertilization potency of sperm in the uterus.
E)  cause the testes to migrate back into the abdominal cavity.F) A) and B)
G) A) and C)

Question 19

In correct chronological order, the three phases of the ovarian cycle are

Accepted Answer

A)  menstrual → ovulation → luteal
B)  follicular → luteal → secretory
C)  menstrual → proliferative → secretory
D)  follicular → ovulation → luteal
E)  proliferative → luteal → ovulationF) A) and E)
G) A) and D)

Question 20

Testosterone is synthesized primarily by the

Accepted Answer

A)  sperm cells.
B)  hypothalamus.
C)  Leydig cells.
D)  anterior pituitary gland.
E)  seminiferous tubules.F) None of the above
G) A) and B)

Exam 46: Animal Reproduction

Which of the following is not properly paired?

Correct AnswerverifiedShow Answer

A primary response by the Leydig cells in the testes to the presence of luteinizing hormone is an increase in the synthesis and secretion of

Correct AnswerverifiedShow Answer

Among these contraception methods, which has the highest risk of accidental pregnancy?

Correct AnswerverifiedShow Answer

Vasectomy

Correct AnswerverifiedShow Answer

A male's "primary" sex characteristics include

Correct AnswerverifiedShow Answer

In humans, the follicular cells that remain behind in the ovary following ovulation become

Correct AnswerverifiedShow Answer

Internal and external fertilization both

Correct AnswerverifiedShow Answer

If you observe vertebrate organisms with parthenogenetic reproduction, internal development of embryos, and the lack of parental care for its young, you should categorize these organisms as

Correct AnswerverifiedShow Answer

Tubal ligation

Correct AnswerverifiedShow Answer

A function-disrupting mutation in the progesterone receptor gene would likely result in

Correct AnswerverifiedShow Answer

Testosterone is synthesized primarily by the

Correct AnswerverifiedShow Answer

The use of birth-control pills (oral contraceptives)

Correct AnswerverifiedShow Answer

Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in

Correct AnswerverifiedShow Answer

In male mammals, excretory and reproductive systems share

Correct AnswerverifiedShow Answer

In correct chronological order, the three phases of the ovarian cycle are

Correct AnswerverifiedShow Answer

For normal human fertilization to occur,

Correct AnswerverifiedShow Answer

The surgical removal of the seminal vesicles would likely

Correct AnswerverifiedShow Answer

Which statement is False concerning reproduction in invertebrate animals?

Correct AnswerverifiedShow Answer

Which of the following characterizes parthenogenesis?

Correct AnswerverifiedShow Answer

For the 10 days following ovulation in a nonpregnant menstrual cycle, the main source of progesterone is the

Correct AnswerverifiedShow Answer

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