Session 6- Getting pregnant Flashcards
Where do sperm mature
Epididymis
What is the role of prostaglandins in the female reporoductive tract
They help stimulate muscles
What is the function of semina, plasma
Transport medium
Nutrition
Buffering capacity
Where does seminal plasma come from
Accessory glands of the male repro tact
What effect does oestrigen have on the cervical mucus
Causes a thin alkaline cervical mucus which is an ideal environment for spermatic
What effect does progesterone have on cervical mucus
Thick acids cervcial mucus which prevents further sperm from interacting with the reproductive tract
How much of seminal plasma is derived from seminal vesicles
60%
What is the composition of the seminal plasma tha is derived from seminal vescicles
Alkaline fluid that neurtralises the acid
Fructose, prostaglandins and clotting factors
How much of seminal plasma is derived from the prostate
25%
What is the composition of seminal plasma that is derived from the prostate
Milky slightly acidic
Proteolytic enzymes- break down clotting proteins and re-liquify semen
Citric acid, acid phosphatase
What is the composition of seminal plasma derived form the Cowper’s gland
Alkaline fluid
A mucous that lubricates the end of the penis and urethral lining
What are the stages in the human sexual repose
Excitement phase
Plateau phase
Organs phase
Resolution phase
what triggers The excitement phase
Largely psychogenic or somatic stimuli
Plataeu phase
Maintenance of stimuli
Orgasm phase
If the threshold os reached and stimuli is maintained
What is teh difference between the make and female sexual response
The resolution phase is followed by a refractory phase in men
In the fist phase of the sexual response what dominates the pelvic nerve
The parasympathetic efferents as well as somatic efferents from the pudental nerve resulting in erection
Physiology of ejection
Neuronal input causes arterial and venous input
Venous dilatation occurs due to increased blood flow against the tough tunica albuginea surrounding the corpus cavernosum
Sympathetic tine is inhibited while parasympathetic innervation i stimulated via te pelvic and cavernous nerve
How does an erection occur in terms of parasympathetic nerves
- post ganglionic fibres release ACh
- ACh binds to M3 receptor on endothelial cells
- a rise in increacellular Ca2+ activate NOS and formation of NO
- NO diffuses into vascular smooth muscle and causes relation - vasodilation
- NO also released directly from nerves
What does an erection require
Sinusoidal relaxation
Arterial dilation
Venous compression
Wha is the neurovascular supply to the corpus cavernosum
Cavernous nerve and vasculature
What are he causes of erectile dysfunction
Psychological
Tears in fibrous Rosie of corpus cavernosum
Drugs
What is ejaculation under te conral of
Sympathetic control
Emission
Movement of semen into prostatic urethra
Contraction of SM in prostate, vas deferens and seminal vesicles
