By the oogenesis 4 mature oocytes occur from one oogonia.
Oogenesis is fully completed after the fertilization of the secondary oocyte.
By the spermatogenesis 1 mature spermatozoon occurs from on spermatogonia
The axis (axonema) of the spermatozoon flagellum is built of microtubules following the 9x3+0 formula.
The human spermatozoon head looks like "flame of candle" in shape.
The mitochondria are arranged in spiral fashion around the middle piece of the spermatozoon flagellum
The spermatogenesis starts during the
Embryonic period
Fetal period
Right after the birth
Puberty
The spermatozoon acrosome represents:
Cistern of the smooth-surfaced endoplasmic reticulum
Secretory granule
Cistern of the Golgi complex (zone)
Lysosome
The oogenesis starts during the:
The marker enzyme of the human spermatozoon acrosome is:
Hyaluronidase
Alkaline phosphatase
Acid phosphatase
Lipase
Which of the following organelles is not present in the ovum (mature oocyte):
Golgi apparatus
Mitochondria
Cenrtioles (cytocentre)
Lysosomes
Body of Balbiani (corpus Balbiani) is present in the:
Oogonia
Spermatogonia
Primary oocyte
Primary spermatocyte
The human spermatogenetic cycle occupys about:
22 days
72 days
52 days
10 days
The diameter of the human ovum is:
5 µm
120 µm
20 µm
220 µm
The spermatozoon length is:
60 µm
10 µm
30 µm
The oogenesis is completed:
Before the fertilization
After the puberty
After the fertilization
Which of the following are specific for the acrosome:
Membrane organelle
Derived from the Golgi complex (zone)
Biochemical analogous to the lysosomes
Contains glocogen
Is built in the primary oocyte
Which of the following are specific for the spermatogenesis:
Starts during the embryonic period
Starts with the onset of puberty
Passes through three phases
Passes through four phases
Which of the following are specific for the secondary spermatocytes:
Haploid number of chromosomes
The biggest in size male germ cells
Are formed during the second phase of spermatogenesis (phase of cell growth)
Are formed during the first phase of spermatogenesis (phase of cell multiplication)
The spermatozoon head contains:
Nucleus
Centrioles
Acrosome
