ch 27 quiz answers

Question 1

which of the following is a change in the male body during puberty

Answer 1

• hair growth in the axillary region, pubic region, and face
• increased testosterone levels resultsing in increased libido (sex drive)

Question 2

which of the following anatomical structures is/are part of the tract within sperm travels from the testis to outside of the body

Answer 2

• bulbourethral gland
• ductus deferens
• efferent ductules

Question 3

consider:
Semen is very low in volume and the sperm cells have difficulty with motility because there is not enough of an energy supply to power their flagella.
Which of the following accessory glands of male reproduction may be mafunctioning?

Answer 3

• seminal vesicle
• thymus glands
• adrenal glands

Question 4

which is true regarding gender

Answer 4

• a person’s sex is solely determines at fertilization
• the SRY gene is found on the Y chromosome
• human females lack a Y chromosome

Question 5

seminal vesicles
group 1/3

Answer 5

• empties into the ejaculartory duct
• deficiency would decrease sperm motility due to a lack of ATP
• produces the protein that causes semen to become sticky and fibrin-like

Question 6

prostate gland
group 2/3

Answer 6

• contributes about 30% of seminal fluid
• surrounds both urethra and ejacultary ducts
• deficiency would decrease sperm motility by allowing the vagina to maintain an acidic environment
• creates a clotting enzyme in semen

Question 7

bulbourethral gland
group 3/3

Answer 7

• increases the pH of residual urine in the urethra
• lubricates the glans penis during sexual intercourse
• adjacent to the urogenital diaphragm bilaterally

Question 8

primary sex organs

Answer 8

• produce sperm
• produce ova

Question 9

secondary sex organs

Answer 9

• uterus
• allow for travel of the ovum to the uterus
• allow for travel of the ovum to the uterus
• deliver sperm to the female copulatory organ

Question 10

secondary sex characteristics

Answer 10

• beard
• enlarged breasts
• deep voice

Question 11

excitement
1/4

Answer 11

• the deep artery dilates
• bulbourethral fluid is secreted by the bulbourethral glands

Question 12

orgasm - emission
2/4

Answer 12

• sperm are moved via muscular contraction from the ductus deferencs to the ampulla to the urethra
• the prostate begins to secrete components of seminal fluid

Question 13

orgasm - expulsion
3/4

Answer 13

• the internal urethral sphincter contracts
• the bulb and root of penis are rhymically compressed

Question 14

resolution
4/4

Answer 14

• the internal pudendal artery constricts
• blood is squeezed from the erectile tissues as the trabecular muscles contract

Question 15

what is true about changes in male body during puberty

true
1/2

Answer 15

• the penis continues to grow for up to 2 years after the testes and scrotum have stopped
• an increase in the frequency of erections is due to estrogen
• an increase in FSH results in an increase in sperm production
• FSH and LH secretion plateaus at the onset of puberty
• DHT stimulates the development of pubic and axillary hair
• if testosterone secretion stops sperm count declines

Question 16

what is true about changes in male body during puberty

false
2/2

Answer 16

• the conversion of testosterone to estrogen causes an increase in muscle mass and appetite
• pure testosterone stimulates beard growth

Question 17

1. the secretions of the male reproductive tract originate in the testes where sperm cells are produced
2. the fluid from the seminal vesicles joins the sperm from the ductus deferens at the ejaculatroy duct
3. the second largest producer of seminal volume the prostate gland surrounds the urethra and the ejaculatory duct
4. contributing about 5% of the overall seminal volume the bulbourethral glands are involved with pre-ejaculataory secretions for lubrication and preparation of the urethra for the passage of semen

Question 18

where is gonadotropin-releasing hormone produced

Answer 18

hypothalamus

Question 19

where is the erectile column of the penis that passes along the ventral side and encloses the penile urethra

Answer 19

corpus spongiosum

Question 20

in humans when do secondary sexual characteristics first appear

Answer 20

at puberty

Question 21

female reproductive development is directly inhibited by

Answer 21

mullerian-inhibiting factor

Question 22

1. GnRH from the hypothalamus stimulates the secretion of FSH and LH
2. FSH stimulates the secretion of androgen-binding protein
3. LH stimulates testosterone secretion
4. Testosterone in the presence os ABP stimulates spermatogenesis
5. Testosterone stimulates the development of a beard and chest hair
6. Inhibin prevents FSH from stimulating further spermatogenesis

Question 23

1. after around age 40 a male’s testosterone levels decline slowly about 1% a year
2. due to the decline in testosterone levels the sperm count also declines
3. while fertility may decreased number of sperm there is also an increase in the frequency of mutations
4. occuring in 50% of men over the age of 80 erectile dysfunction makes it difficult to engage in sexual intercourse

Question 24

spermatogenesis occurs in the

Answer 24

seminiferous tubules

Question 25

which of the following is a correct sequence of cells in spermatogenesis

Answer 25

spermatogonium–> primary spermatocyte–> secondary spermatocyte

Question 26

during spermatogenesis which of the following cells is the first to become haploid

Answer 26

secondary spermatocyte

Question 27

which of the following is true regarding a spermatogonium

Answer 27

it divides by mitosis to produce a spermatogonium and a primary spermatocyte

Question 28

a primary spermatocyte divdies by way of ___ to produce ____

Answer 28

• meiosis
• two secondary spermatocytes

Question 29

which of the following is true regarding the fate of a spermatid

Answer 29

it differentiates into a sperm cell