Male Reproductive System (Exam 2) Flashcards
The testis exocrine function is to produce _______ and the endocrine function is to produce _______.
spermatozoa
testosterone
The testis has a tunica ______ made of what 2 layers?
vaginalis
visceral lamina + parietal lamina
In the stroma of the testis, the _____ _____ covers the testis and the epididymis.
tunica albuginea
Tissue type of tunica albuginea of testis
DICCT (appears white)
Term for the branches of the testicular A & V that penetrate deep into the testis
Tunica vasculosa
_____ connects the tunica albuginea with the mediastinum in the testis and divide the testis into _____.
septula
lobules
_______ is located within the mediastinum of the testis.
rete testis
Term for the branches of the testicular A & V that penetrate deep into the testis or remain superficial
Tunica vasculosa
Term for the functional channels essential for getting the sperm out of the testis and adding fluid for nourishment
mediastinum
Main structures that make up the parenchyma of the testis
convoluted seminiferous tubules
Function of convoluted seminiferous tubules of the testis
form germ cells into spermatozoa
Convoluted seminiferous tubules are lined by _____________.
spermatogenic epithelium
Where does the formation of the male germ cells occur?
spermatogenic epithelium
The straight seminiferous tubules of the testis are only prominent in the ______.
stallion
The initial portion of the straight seminiferous tubules are only lined by ________.
sertoli cells
Function of sertoli cells
act as valve to prevent sperm backing up
After the initial portion of sertoli cells in the straight seminiferous tubules of the testis, then it is lined by ___________.
simple cuboidal epithelium
Function of rete testis
add fluid to spermatozoa
What cell type is found in the efferent ductules of the testis?
spermatogenic cells
Which cells in the testis have long, elliptical nuclei with actin filaments in the convoluted seminiferous tubules?
myoid (peritubular) cells
Function of myoid cells
actin filaments contract to release sperm from convoluted –> straight tubules
Term for entire process from spermatogonia –> spermatozoa
spermatogenesis
3 phases of spermatogenesis
- spermatocytogenesis
- meiosis
- spermiogenesis
What is the product of spermatocytogenesis?
primary spermatocyte
The primary spermatocyte at the end of spermatocytogenesis is (haploid/diploid).
diploid
Which spermatogonia are progenitor cells which can regenerate spermatogonic epithelium and continue to divide?
spermatogonia A
Overtime, _______ can differentiate into _______ which will become the end product of spermatogenesis, _______.
spermatogonia A
spermatogonia B
primary spermatocytes
What is the product of meiosis in spermatogenesis?
round spermatid
The product of meiosis, the round spermatid, is (haploid/diploid) and therefore (can/cannot) fertilize at this stage.
haploid
cannot
(T/F) Meiosis II occurs immediately after meiosis I.
true
After meiosis II, __ ________ are produced.
4 round spermatids
The 4 round spermatids produced from meiosis II are (haploid/diploid) with _ chromosome(s) and __ set(s) of DNA, and therefore, (can/cannot) undergo fertilization.
haploid
1
1
cannot
The product of spermiogenesis goes from a round spermatid to _______.
spermatozoa (elongated spermatid)
(T/F) The spermatozoa right after spermiogenesis are fully mature.
False - structurally the same but not fully mature
What 4 processes does a round spermatid undergo to become a spermatozoa in spermiogenesis?
- form acrosome
- condense chromatin
- form flagellum
- shed excess cytoplasm
What is an acrosome?
glycoproteins that form a “cap of digestive enzymes” over nucleus in spermatozoa
Function of acrosome
help sperm penetrate corona radiata + zona pellucida
Why does chromatin condense in formation of spermatozoa?
easier to go through female reproductive system
________ phagocytize the excess cytoplasm during spermiogenesis.
sertoli cells
What are the main spermatozoan characteristics?
head (w/ acrosome + nucleus)
flagellum