Male Sexual Act Flashcards
The most important source of sensory nerve signals for initiating the male sexual act is —–
Glans penis
The brain is not necessary for the performance of male sexual act because?
Appropriate genital stimulation can cause ejaculation
The male sexual act results from inherent mechanisms integrated in ——–
Sacral and lumbar regions and can be initiated by either psychic stimulation in the brain or sexual stimulation from the sex organs.
During erection, the nitric oxide released activates —– enzyme
Guanyl cyclase which causes increased release of cyclic guanosine monophosphate GMP
The cerebrum is not of critical importance to the Male sexual Act which is exhibited in
Decerebrate animals and people with injuries above the lumber region of the spinal cord can exhibit emission and ejaculation following direct genital stimulation
Dihydrotestosterone is believed to be responsible for many of the physiological activities ascribed to
Male hormone
Steroid hormones exert their influence through?
Direct actions on protein synthesis within the target cells
FSH is required in the early stage of spermatogenesis while testosterone is necessary for……….
Final maturation of sperm
There are two inhibins ………
In extract pf testis in men
Ovarian follicle in women
Inhibin is formed from three polypeptide subunits…………
1alpha subunits
2 beta subunits
The alpha subunit of inhibin is glycosylated with a molecular weight of ……
18000
Two beta subunits are not glycosylated with a molecular weight of 14000
The alpha and beta subunits of inhibin are linked by……..
Disulfide bond
Inhibin is produced by ………. and ………. In females and males respectively
Granulosa cells
Sertoli cells
What are Activins?
They are beta subunits of inhibin which combine.
They stimulate FSH production rather than inhibit it.
Functions
It promotes wbcs development
Involved in mesoderm formation during embryo development.
