Which of the following hormones are involved in uterine contractions during parturition? Select one: a. Oxytocin and prostaglandins b. Prolactin and oxytocin c. Estrogen and progesterone d. Prostaglandins and prolactin

A. There is an increase of FSH at the beginning of the menstrual cycle. What causes it? B. There is a surge in E2 level before the ovulation. What causes it? C. There is a decrease of FSH before the ovulation. What causes it? D. There is a surge of LH and FSH that induces the ovulation. What causes the surge? E. There is a decrease of LH and FSH after ovulation. What causes it? F. There is a decrease in E2 after ovulation. What causes it? G. There is an increase of E2 and P4 a few days after the ovulation. What causes it? H. There is a decrease of E3 and P4 at the end of menstrual cycle. What causes it?

The following sketch represents the feedback loops that govern the production of sperm in the testis. Use the word bank provided to complete this sketch by labelling all important hormone-producing structures, target sites, hormones produced, and effects caused. 147 148 a. Inhibin inhibits anterior pituitary. b. Negative feedback inhibits hypothalamus. C. Hypothalamus secrets releasing hormones. d. Anterior pituitary secretes FSH and LH 155 e. Rising levels of testosterone in the blood. 1. Inhibin released by testis. 9. Sperm production 154 149 152 h. Testis secretes testosterone. i. Negative feedback į Male sexual differentiation Puberty Male physique Sex drive 156 153 150 151

According to the diagram at right, FSH injections to super-stimulate the ovaries will: a. Rescue the subordinate follicles from atresia b. Reverse atresia of subordinate follicles c. Stimulate new waves of follicular growth d. Cause ovulation of atretic follicles     what prevents the dominant follicles of Waves 1 and 2 from ovulating? a. follicles are not big enough b. the animal is not in heat c. the high progesterone prevents the LH/FSH surge d. all of the above e. none of the above

Match the hormones to the organ that makes them or to the action they cause. Use letters more than once. A. estrogen B. follicle stimulating hormone (FSH) C. human chorionic gonadotropin (HCG) D. luteinizing hormone (LH) E. progesterone F. testosterone blastula corpus luteum Leydig's cells ovary A A v1st hormone of pituitary gland to start cycle B. B v 2nd hormone of pituitary gland halfway through cycle C.C vendometrium grows more blood vessels D.D v keeps corpus luteum E. E v stimulates sperm production, muscle growth, aggression v keeps endometrium in uterus vovulation (egg leaves ovary) tells egg to develop

Sertoli cells produce androgen binding protein. The purpose of this androgen binding protein is to :   (select one) a. Transport testosterone to the developing germ cells b. Increase the clearance rate of testosterone c. Prevent the germs cells being exposed to toxic concentrations of testosterone d. Manufacture androgens e. Transport testosterone to the capillaries

Which of the following is NOT associated with the embryo developing into a male: a. androgen c. Müllerian ducts b. Wolffian ducts d. testosterone

Which of the following hormones in pregnancy is INCORRECTLY matched with its description? a. Estrogen - promotes growth of the uterus b. Insulin - target cells are slightly less responsive c. GnRH - is at low levels due to negative feedback from estrogen & progesterone d. hCG - promotes cell division within the growing embryo e. Progesterone - prohibits uterine contractions

The oestrus cycle refers to: (select one) a. The cyclical occurance of physical and endocrine events which occur in adult females b. The period of increased female sexual receptivity c. The shedding of the uterine endometrium d. The release of pheromones by adult females e. The breeding season

One of the roles of follicle stimulating hormone (FSH) in the female reproductive system is Select one: a. to trigger the thickening of the endometrium in the follicular stage b. to promote menstruation during the follicular stage c. to promote menstruation during the luteal stage d. to trigger the thickening of the endometrium in the luteal stage