Quiz 7

Question 1

In Male, glycoprotein hormone _____ is secreted from the anterior pituitary and affects Leydig cells. Leydig cells are responsible for _____ production. Meanwhile, FSH secreted from the _____ causes production of estradiol from the sertoli cells. As you may know, a glycoprotein hormone named _____ secreted from the Sertoli cells to keep a tab on FSH secretion and acts as a part of negative feedback system on FSH.

Answer 1

LH
Testosterone
Anterior Pituitary
Inhibin

Question 2

The entire Spermatogenesis takes place in the structure/organ called _____ (be specific). It consists of three distinct phases named _____, _____, and _____.

Answer 2

Seminiferous Tubule
Spermatocytogenesis
Meiosis
Spermiogenesis

Question 3

True or False

Spermatocytes are found in the basal compartments of the seminiferous tubules.

Answer 3

False, Adluminal

Question 4

True or False

Life span of the secondary spermatocyte is between 19-20 days.

Answer 4

False, 2 days

Question 5

True or False
Spermatocytogenesis (proliferation) consists of the mitotic divisions and in bull takes about 17-18 days to be completed.

Answer 5

False, 21 days

Question 6

True or False
Regardless of species, a spermatozoa has to go through 4.5 cycles and 7 stages in each cycle of seminiferous epithelium before it becomes an elongated sperm.

Answer 6

False, 8 stages

Question 7

Name the four stages of spermiogenesis.

Answer 7

Golgi phase
Cap phase
Acrosomal phase
Maturation

Question 8

Which phase of the spermiogenesis is associated with nuclear and cytoplasmic elongation?

Answer 8

Acrosomal Phase

Question 9

How long does spermiogenesis take in the bull?

Answer 9

17-18 days

Question 10

Define Spermiation

Answer 10

when the elongated sperm detaches from the Sertoli cells and falls into the lumen

Question 11

Name the three parts of the sperm tail? In which part do you find the assembly of mitochondria?

Answer 11

Middle - assembly of mitochondria
Principle
Terminal

Question 12

Name three enzymes found in the acrosomic vesicle. Which ones play major roles in digestion egg wall?

Answer 12

Acrosin
Hyaluranidase
Acid hydrolase
Acrosin and Hyaluranidase play a role in the digestion of the zona pellucida

Question 13

What is the length of each cycle in Rabbits?

What is the duration of complete spermatogenesis in Rabbits?

Answer 13

10.5-10.6 days

48 days

Question 14

True or False

Spermatogonia A and B are found in the adluminal compartments of the seminiferous tubule.

Answer 14

False

Question 15

What is the length of each cycle in Stallion?

What is the duration of complete spermatogenesis in Stallion?

Answer 15

12.2 days

about 60 days

Question 16

Name the three distinct stages of spermatogenesis and the approximate duration (days) of each stage in bulls.

Answer 16

Spermatocytogenesis - 21 days
Meiosis - 20 days
Spermiogenesis - 17 days

Question 17

Primary spermatocyte undergo meiosis division and become secondary spermatocytes in the _____ compartment of the seminiferous tubule. Round spermatids become elongated spermatozoa in the _____ compartment.

Answer 17

adluminal

adluminal

Question 18

True or False

During the cap phase of the spermiogenesis, mitochondria are assembled around the flagellum (tail base)

Answer 18

False