FGSS 2140 Lecture Notes - Lecture 8: Female Sperm Storage, Pituitary Gland, Ejaculation

85 views3 pages

redspider32

15 Sep 2016

School

Cornell University

Department

Feminist, Gender & Sexuality Studies

Course

FGSS 2140

Professor

J.Fortune

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

Lecture #8: regulation of the testis (review) (see handout/image in book, lh and testosterone. 1. testosterone is the messenger: hypothalamus (gnrh) acting on pituitary, acting on ley- dig cells which release androgen testosterone. 2. negative feedback by (protein hormone) inhibin (that can act on hypothalamus or the pi- tuitary) Modulators of testis function (prolactin, gnrh, oxytocin, osteocalcin) 1. oxytocin (from leydig cells) & gnrh (from sertoli cells) made in testes. 4. difficult to figure out what hormone affect spermatogenesis. Fsh for first stage of mitosis and all stages of mitosis and meiosis testosterone works with fsh for first mitosis, first meiotic division, and spermiogenesis. Fsh synergizes: increases androgen receptors on sertoli cells (in spermiogenesis: system for storage and delivery of gametes, testes. 1. some sperm are store in the seminiferous tubules and the tete testis. Ii. epididymus: most sperm storage, maturation: gain the ability to fertilize.

Related Questions

From the list below, select all statements accurate with respectto hormonal regulation of steroid hormone production in males andfemales.

Question 9 options:

A)	hypothalamic secretion of GnRH stimulates LH and FSH secretionin the anterior pituitary

B)	FSH secretion in the anterior pituitary stimulates testosteronesecretion in theca cells and Leydig cells

C)	FSH secretion in the anterior pituitary stimulates inhibinsecretion by granulosa cells and Sertoli cells of the ovary andtestis, respectively

D)	LH secretion stimulates testosterone secretion in both ovariangranulosa and theca cells

E)	LH secretion stimulates testosterone secretion in Leydig andtheca cells of the testes and ovaries, respectively

F)	inhibin feeds back to turn down both LH and FSH secretion in theanterior pituitary

G)	inhibin feeds back to selectively suppress LH secretion in theanterior pituitary without changing FSH secretion

H)	inhibin feeds back to selectively suppress FSH secretion in theanterior piutitary without changing LH secretion

I)	testosterone secretion in males always feeds back to inhibitGnRH secretion from the hypothalamus

J)	testosterone secretion in males always feeds back to inhibitanterior pituitary responsiveness to GnRH

K)	progesterone in high concentration has an inhibitory effect onGnRH secretion in the hypothalamus

L)	similar to testosterone's effect in males, estrogen in femalesalways feeds back to inhibit GnRH secretion from thehypothalamus

M)	when estrogen levels in females are low, estrogen feeds back atthe hypothalamus to inihibit GnRH secretion from the hypothalamussimilar to testosterone's effects in males

N)	when estrogen levels in females are high and unaccompanied byhigh progesterone levels, estrogen is stimulatory, rather thaninhibitory to GnRH secretion in the hypothalamus

O)	if estrogen levels in females are high but are accompanied byhigh progesterone levels, the powerful inhibitory effects ofprogesterone override the stimulatory effects of estrogen andsuppress GnRH secretion from the hypothalamus

viridianhornet587

Please help me answer this multiple choice questions: (please answer all questions)

No explantion needed just the answer needed.

physiology and neurobiology questions below.

31. Systemic arterioles dilate in response to _____.

A. Increased CO2 levels in the tissue

B. Decreased O2 levels in the tissue

C. Decreased pH in the tissues

D. All of the above

32. Blood in the pulmonary arteries ______

A. Contains hemoglobin which is about 98.5% saturated with oxygen

B. Has a PO2 of about 40 mmHg

C. Both of the above

D. Neither of the above

33. Completion of first meiotic division of oogenesis yields.

A. One secondary oocyte

B. Four primary oocyte

C. Four mature ova (egg cells)

D. Four secondary oocytes

34. The final absorbable products of chemical digestion occurring in the brush border of the small

intestine include:

A. Monosaccharides and amino acids

B. Proteins and chylomicrons

C. Disaccharides and amino acids

D. Monosaccharides and disaccharides

35. The hemoglobin oxygen curve saturation curve plots ____ on the dependent (Y) axis and ____

on the independent (X) axis.

A. Oxygen concentration; hemoglobin concentration

B. % oxygen saturation of hemoglobin; PO2 of blood

C. % oxygen saturation of hemoglobin; PCO2 of blood

D. Hemoglobin concentration; oxygen concentration

36. In contrast to the female hypothalamic pituitary-sex steroid axis, control of the male axis is

aimed at ____.

A. Allowing spermatogenesis to occur just once a month

B. Keeping levels of pituitary gonadotropins relatively constant in blood

C. Keeping levels of hypothalamic releasing hormones higher than usual in blood

D. Causing a positive feedback effect of sex steroid up on gonadotropins

37. Which of the following will correct acidosis?

A. Speed up the proton pump

B. Buffering of protons with phosphate in the tubular lumen

C. Renal metabolism of glutamine

D. All of the above

38. Epithelium with a brush border (microvilli) is characteristics of the mucosa found in

A. Duodenum

B. Proximal Tubule

C. Both of the above

D. Neither of the above

39. The transport maximum (Tm) for glucose, addition filtered glucose

A. Is no longer filtered

B. Appears in urine

C. Is secreted

D. Is reabsorbed

40. Stroke volume is equal to ____.

A. End-diastolic volume alone

B. End-diastolic volume plus end-systolic volume

C. Cardiac output minus heart rate

D. End-diastolic volume minus end-systolic volume

41. The long term solution to a change in blood pH involves

A. Digestive System

B. Respiratory System

C. Buffers such as hemoglobin

D. Renal System

42. The left heart receives blood from ___ and pumps blood out through the ____.

A. Superior vena cava; pulmonary trunk

B. Pulmonary veins, pulmonary trunk

C. Pulmonary veins; aorta

D. Pulmonary arteries; aorta

43. Selection and activation of specific B lymphocytes may lead to all EXCEPT_____.

A. Formation of memory cells

B. Secretions of antibodies

C. Activation of complements to destroy tagged antigen

D. Secretion of perforin

44. Bile is stored and released into the duodenum from the

A. Liver

B. Pancreas

C. Gall Bladder

D. Duodenum

45. Beta oxidation of fatty acids yields _____,which then can be further oxidized to produces ATP.

A. Glycogen

B. Amino acids

C. Keto acids

D. Acetyl CoA

46. The relationship between the loop of Henle and the vasa recta capillaries function.

A. Absorption of glucose, amino acids and creatinine

B. Countercurrent exchange

C. Countercurrent multiplication

D. All of the above

47. Anterior pituitary production of Follicle Stimulating Hormone (FSH) is decreased by

A. Testosterone from Sertoli cells

B. Inhibin from Sertoli cells

C. Inhibin from interstitial (Leydig) cells

D. Luteinizing Hormone (LH) from granulosa cells

48. A response to acidosis would involve

A. Slowing down the proton pump

B. Greatly increased excretion of HCO3- (bicarbonate ions)

C. Both of the above

D. Neither of the above

49. The conversion of spermatid to spermatozoa occurs

A. By differentiation process in the seminiferous tubule

B. In epididymis

C. By meiosis, in the seminiferous tubule

D. In the prostate gland

50. Antibody-mediated immunity defends against ____.

A. Virus infected cells

B. Viruses and bacteria in the blood or body fluids

C. Bacteria only

D. Viruses only

pinkwhale636

FGSS 2140 Lecture Notes - Lecture 8: Female Sperm Storage, Pituitary Gland, Ejaculation

Document Summary

Get access

Related Documents

FGSS 2140 Lecture Notes - Lecture 5: Seminiferous Tubule, Vas Deferens, Spermiogenesis

PHAC 4001 Lecture Notes - Lecture 24: Metastasis, Oxymetholone, Buserelin

ANP 1107 Study Guide - Final Guide: Sertoli Cell, Folliculogenesis, Leydig Cell

Related Questions