Question

22) Select all of the correct statements below

A) Resolution occurs after orgasm or ejaculation in the male

B) Nitric oxide is an important component of the erection process in the male

C) Infertility is defined as the inability to maintain an erection long enough for sexual activity

D) Testosterone levels remain steady until around 80 years of age in the male

E) Emission is moving of seminal fluids out of the body

23) The effects of estrogen are (select all that apply)

A) Positive feedback on LH and FSH secretion

B) Sloughing of the endometrium

C) Inhibition of GnRH release

D) Stimulation of progesterone release

E) Upregulation of LH receptors in developing follicle

25) The secretion of LH causes ________. Select all that apply

A) Corpus luteum formation

B) Ovulation

C) Inhibition of testosterone

D) FSH secretion

E) Menopause

26) During the proliferative phase, the secretion of what hormones are increased? Select all that apply

A) FSH

B) LH >

C) Estrogen >

D) Progesterone

E) Testosterone

27) Identify the phases of the menstrual cycle. Select all that apply

A) Secretory phase

B) Proliferative phase

C) Menopausal phase- only me

D) Menses >

E) Fertile Phase

29) What occurs during menses? Select all that apply

A) Secretion of glycogen by endometrial cells

B) Necrosis of the functional layer

C) Constriction of spiral arteries

D) Contraction of uterine smooth muscle

E) Increased secretion of progesterone

Answer 1

22)Human sexual response cycle has four phases and they are excitement,plateau,orgasmic and resolution.The resolution phase is a phase that occurs after orgasm or ejaculation. This stage allows the relaxation of muscles, pressure drop,the size of male reproductory part returns to normal size.Resolution occurs after orgasm or ejaculation in the male.The contraction and relaxation of smooth muscles in male reproductive part is important for its functions.During the erection process Nitric oxide reaxes the corpus cavernosum.Nitric oxide synthase synthesizes nitric oxide and areas of male sexual behavior in the brain distributes nitric oxide responsive guanylyl cyclase.So Nitric oxide is an important component of the erection process in the male.

23)Positive feedback is a feedback that tends to increase the output and the result of positive feedback amplifies the output.Negetive feedback is a feedback that tends to reduce the output and change the sytem to normal state.The high concentration of estrogen becomes positive feedback to anterior pituitary that results in the production of FSH and LH hormones.These hormones in turn produces more estrogen.So estrogen causes Positive feedback on FSH and LH secretion.Estrogen is responsible for the ovarian cycle in females.When the estrogen reaches a certain level it causes a surge in LH that triggers ovulation and progestrone secretion.So stimulation of progestrone release is effected by estrogen.

25)The luteinizing hormone is a hormone released from anterior pituitary gland.During the ovarian cycle LH helps forming secondary oocyte.Then a surge in LH causes formation of corpus luteum and and also triggers

26)Proliferative phase of ovarian cycle is the phase in which the follicles in ovaries mature and prepare for the ovulation.In this phase the the hormone estrogen is released from the maturing Graafian follicles in ovaries. FSH levels increases for the stimulation of maturation.Then after the maturation FSH secretion slows and then LH secretion begins.This ruptures mature follicles and then releases to fallopian tubes.

27)The menstrual cycle has two phases proliferative phase and secretory phase.Proliferative phase is as explained above and secretory phase is after ovulation the estrogen and progesterone levels are high and endometrium is prepared with nutrients to nourish if an egg is fertilized.If implantation of fertilized egg do not occur then LH and FSH drops and then progestroneand estrogen levels drops causing endometrium to shed and mentruation begin.

28)During the menstruation the reduction of estrogen and progestrone leads to contriction of spiral arteries and thus necrosis of the functional layer.The spiral arteries are hormone sensitive and thus constrict with decrease in hormone level .Contractions of tunica media of spiral arteries causes interruption of blood supply and thus dying of functional layer occurs.Blood does not coagulate due to fibrinolytic factor and thus the necrotic tissue is eliminated.