Lect 26 Flashcards
What hormone secretion is very low during prepubertal phase? Why?
- LH and FSH low
- due to active neural inhibition of GnRH release
What hormones are secreted during puberty
- increased secretion of GnRH -> LH and FSH
- stimulation in spermatogenesis and testosterone production
What happens to testosterone during senescence
- senescence: the condition or process of deterioration with age.
- decrease in production of sperm and testosterone
What are the signs of androgen deficiency in aging males (ADAM)
- decrease in
- bone formation
- muscle mass
- libido
- hematocrit
- increase in
- facial hair
- changes in appetite
What glands/organs are responsible for ejaculate (semen) production
- accessory glands (90%)
- Seminal vesicles: 60%
- prostate: 20%
- Bulbourethral gland: 10%
- sperm compose remaining 10%

Where are the seminal vesicles
- there are two
- empty into last portion of the ductus deferens, one on each side

Where are the Bulbourethral gland
- pair
- empty into urethra, just before urethra enters penis

function of prostate gland
- secretes alkaline fluid that neutralizes the acidic vaginal secretions
take home point: what is the function of seminal fluid
- help support and maintain sperm function in the female reproductive tract
prostate disease are common at what age
after age 50
what is benign prostatic hyperplasia
- enlarged prostate, which may cause dribbling after urination or a need to go often, especially at night
cause of male erection
- arterioles in penis dilate
- penis engorges with blood
penile erectile tissue is composed on three erectile tissues. name them
- 2 corpora cavernosa
- 1 corpus spongiosum

explain the erection reflex in males
- basic spinal reflex
- mechanoreceptors stimulated in glans penis
- parasympathetic innervation of arterioles in penis
- can be facilitated or inhibition by higher brain centers
Explain the erect state (tumescence) of erectile response
- relaxation of helicine arteries by NO
- blood flows into cavernous spaces -> engorgement and erection