Question

15. The uterine contractions known as "labor pains" are caused by the release of from the posterior pituitary A) ADH B) luteinizing hormone C) prolactin D) oxytocin E) parathyroid hormone 16. What constitutes the internal environment? A) extracellular fluid B) interstitial fluid C) plasma D) all of the above Cormpared to a graded potential, an action potential is A) larger, does not propagate along the axon B) smaller, is an all-or-none event C) larger, can have a range of values D) larger, is an all-or-none event E) smaller, can have a range of values 17. and-- Which structure is a primary reproductive organ found in human males? A) Scrotum B) Vas deferens C) Testis D) Epididymis E) Penis 18. A) are not homeostatic B) have a receptor, a control center and an effector C) are rare in healthy individuals D) respond by making deviations from normal even larger Scrambled version D Page 4

Answer 1

Ans (D) Oxytocin

It is Neurohormone in Mammas , present in both sexes , to regulate physiological and behavioral process .It is produced by Hypothalamus and stored and secreated to bloodstream in response to uterus contraction from pea size str at base of brain Posterior Pituitary gland . It's primary function is to stimulate contraction of uterus thus causing labour pain & milk ejection and also promote maternal nurturing behaviour .Basically Oxytocin is best known for its role in female reproduction and disscoverd by Henry Dale in 1906. Some time also called as "love hormone".