Male Reproductive System

Question 1

an enlarged prostate can interfere with _____ because it narrows the _____

Answer 1

urination, urethra

Question 2

The end result of meiosis is 4 gametes that are _____ with 23 chromosomes. This means that each gamete has _____ the number of chromosomes of the original gamete.

Answer 2

haploid, half

Question 3

_____ is cell division of somatic cells. It involves ___ cell division phase wherein _____ daughter cells are produced. The _____ number of each daughter cell is the same as the parent cell.

Answer 3

mitosis, one, duplicate, chromosome

Question 4

_____ are sex cells produced by each parent.

Answer 4

gametes

Question 5

A _____ is a fertilized egg that has a combination of both parents’ genes.

Answer 5

zygote

Question 6

_____ sex organs or gonads produce gametes. _____ sex organs are organs other than the gonads that are necessary for reproduction.

Answer 6

primary, secondary

Question 7

As the hypothalamus matures at puberty, it produces _____ _____ hormone. This hormone stimulates anterior pituitary cells (gonadotropes) to secrete _____ _____ hormone and _____ hormone.

Answer 7

gonadotropin-releasing (GnRH), follicle stimulating (FSH), luteinizing (LH)

Question 8

FSH stimulates _____ and raises sperm count.

Answer 8

spermatogenesis

Question 9

LH stimulates interstitial cells to produce _____

Answer 9

testosterone

Question 10

Spermatogenesis involves 1) the remodeling of large _____ cells into small mobile sperm cells with _____, 2) the reduction of chromosome number by 1/2 in sperm cells, and 3) the shuffling of genes so new combinations exist in the sperm that are different from the _____. 4 sperm cells are produced from one germ cell by _____.

Answer 10

germ, flagella, parents, meiosis

Question 11

In spermatogenesis, _____ are transformed into _____. Excess cytoplasm is discarded, and they grow tails!

Answer 11

spermatids, spermatozoa

Question 12

2 requirements for sperm motility

Answer 12

elevated pH

energy source

Question 13

_____ fluid buffers vaginal acidity from 3.5 to 7.5

Answer 13

prostatic

Question 14

an enlarged prostate can interfere with _____ because it narrows the _____

Answer 14

urination, urethra

Question 15

The protein that clots and causes the stickiness of the semen is _________.

Answer 15

seminogelin

Question 16

Prior to ejaculation, sperm are stored primarily in ___ _______.

Answer 16

the epididymus

Question 17

The first hormone secreted at the onset of puberty is ________-_______ _______.

Answer 17

gonadotropin-releasing hormone

Question 18

When it is necessary to reduce sperm production without reducing testosterone secretion, the sustentacular cells secrete ______.

Answer 18

inhibin

Question 19

The point in meiosis at which sister chromatids separate from each other is ______ ____.

Answer 19

anaphase II

Question 19

Under the influence of androgens, the embryonic ______ duct develops into the male reproductive tract.

Answer 19

mesonephric

Question 20

Spermatozoa obtain energy for locomotion from ______ in the semen.

Answer 20

fructose

Question 21

The _______, a network of veins in the spermatic cord, helps keep the testes cooler than the core body temperature.

Answer 21

pampiniform plexus

Question 22

All germ cells beginning with the _______ are genetically different from the rest of the body cells and therefore must be protected by the blood-testis barrier.

Answer 22

secondary spermatocytes

Question 23

The corpora cavernosa as well as the testes have a fibrous capsule called the ______.

Answer 23

tunica albuginea

Question 24

Over half of the semen consists of secretions from a pair of glands called the _______.

Answer 24

seminal vesicles

Question 25

The blood-testis barrier is formed by tight junctions between the _______ cells.

Answer 25

sustentacular

Question 26

The earliest haploid stage of spermatogenesis is the _____.

Answer 26

secondary spermatocyte

Question 27

Erection of the penis occurs when nitric oxide causes the _______ arteries to dilate.

Answer 27

deep

Question 28

A sperm penetrates the egg by means of enzymes in its _____.

Answer 28

acrosome