Begins at puberty Continuous production Declines with age 2 functional units needed for spermatogenesis Seminiferous tubules spermatogenesis in the germinal epithelium Interstitial cells/Leydig cells secrete androgens Blood-testes barrier barrier between basal & apical compartments of seminiferous tubules prevent large substances from blood & ISF from reaching steroids can pass through (because fat soluble?) formed by…
Brief info on calcium: Calcium is important for many physiologic processes Neurons are very sensitive with changes in Ca2+ ion concentration 0.1%: in ECF 1%: in cells 98.9%: stored in bones & teeth Most abundant cation in the body Calcium in plasma is present in 3 forms: protein bound form (can’t diffuse capillary membrane) ionized…
Stress: Dynamic state within the body resulting from the interaction of the body with the stressor. Stressors: Stimuli that impose strain on body homeostasis. Types of stressors: Physiological pregnancy adolescence mating ageing Physical orthostasis (upright standing position) exertion trauma infection Metabolic hypoxia hypoglycemia acidosis External/ Environmental loud noise air polution bright light threats Mental/Psychological anger…
