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Flashcards in Guyton Chapter 80 Deck (21)
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1

Draw the gross anatomy of the male reproductive tract

.

2

Describe the route of sperm from formation to ejaculation through the urethra.

Formation in seminiferous tubules.
Epididymis.
Vas deferens.
Ampulla of vas deferens.
Into ejaculatory duct of prostate (+prostatic duct secretions + seminal vesicle secretions).
Urethra (+bulbourethral gland secretions BILATERAL).

3

What are the three male reproductive functions?

Spermatogenesis

Performance of the male sexual act

Regulation of male reproductive function by hormones

4

Draw the anatomy of a seminiferous tubule. Label Leydig cells, primary spermatocytes, spermatogonium, secondary spermatocytes, spermatids, and Sertoli cells

.

5

What is the first stage of spermatogenesis? (Think Sertoli)

Migration of spermatogonium amongst Sertoli cells toward central lumen

6

What does passing the Sertoli cell barrier do? What are the names as the spermatogonia go through meiosis?

Forms primary spermatocytes.

Primary spermatocyte, secondary spermatocyte, spermatid, spermatozoa

7

Draw the anatomy of a spermatozoa. How does flagellar movement of the tail occur? (Details!)

Longitudinal sliding of the 9+2 arrangement causes flagellar movement

8

Describe the acrosome. What is it derived from? What does it contain?

Golgi apparatus.

Contains hyaluronidase and proteolytic enzymes

9

What organelles are in the spermatozoa body? What role do they serve?

Loaded with mitochondria, provide ATP for flagellar movement.

10

What is the average velocity of a mature sperm?

1-4 mm/day

11

What five hormones stimulate spermatogenesis?

Testosterone

LH

FSH

Estrogen

GH

12

What hormone do Leydig cells secrete for spermatogenesis? How does it function?

Testosterone.

Growth and division of germinal cells.

13

What hormones does the anterior pituitary secrete for spermatogenesis? How does it function?

LH: stimulate Leydig cells to secrete testosterone.

FSH: stimulates Sertoli cells to aid in spermatogenesis

GH: promotes early division of spermatogonia

14

What hormone do Sertoli cells secrete for spermatogenesis? How does it function?

Estrogen: possibly involved in spermiogenesis.

15

How many sperm are produced per day by the testes?

120 million

16

Where is sperm mostly stored? Where else is it stored?

Mostly vas deferens, some in seminiferous tubules

17

What makes a sperm a "mature" sperm? When does this happen?

Maturity is marked by motility and capable of fertilization. This happens after ejaculation.

18

What cells secrete the nutritive fluid in the ejaculate? What does the fluid contain?

Sertoli cells and epididymis epithelial cells.

Fluid contains testosterone, estrogen, enzymes, and special nutrients.

19

What pH range enhances sperm activity? What causes death?

pH >= 7 enhances

pH

20

What is the life expectancy of sperm in the female genital tract?

1-2 days

21

What is contained in the fluid secreted by seminiferous tubule epithelia?

Citric acid, fructose, prostaglandins, and fibrinogen