Hormones, homeostasis and reproduction

Question 1

thyroxin

Answer 1

is produced in the thyroid and has the function to regulate our metabolism and increase heat production

Question 2

leptin

Answer 2

is secreted by cells in the adipose tissue and it regulates appetite

Question 3

melatonin

Answer 3

is produced pineal gland to control circadian rhythms

Question 4

a gene on the y chromosome

Answer 4

allows embryonic gonads to develop and testis secrete testosterone

Question 5

testosterone

Answer 5

develops pre-natal development of male- genitalia

Question 6

in puberty in males

Answer 6

sperm production and development of secondary sexual characteristics

Question 7

estrogen and progesterone

Answer 7

causes the pre-natal development of female reproductive organs

Question 8

during puberty in females

Answer 8

female secondary characteristics

Question 9

the menstrual cycle is

Answer 9

controlled by positive and negative feedback mechanisms involving ovarian and pituitary hormones

Question 10

Causes and treatment of Type 1 and type 2 diabetes

Question 11

testing of leptin for

Answer 11

clinical obesity

Question 12

melatonin alliviiates

Answer 12

jetlag

Question 13

IVF

Answer 13

suspend the normal secretion of hormones, followed by the use of artificial doses of hormones to induce superovulation and establish a pregnancy

Question 14

investigation of sexual reproduction in deer

Answer 14

William Harvey

Question 15

Explain the control of blood glucose

Answer 15

Pancreas monitors blood glucose,
absorption of glucose from digestion in the intestine increases blood sugar/fasting reduces blood sugar,

if blood glucose is too high
B- cells of pancreas produce insulin,
insulin stimulates the uptake of glucose to cells,
insulin stimulates liver/fat cells to store glucose as glycogen,
leading to a decrease in blood glucose,

if blood glucose is too low
a-cells of pancreas produce glucagon,
glucagon stimulates liver to break glycogen into glucose,
leads to increased blood sugar,

Question 16

Questions

Answer 16

what is positive and negative feedback? what does it mean?

Question 17

three phases

Answer 17

Follicular phase
- menstruation endometrium shed
- FSH increases and follicle develops

Ovulatory phase
- FSH and follicle stimulate estrogen release
- estrogen stimulates endometrium development
- estrogen stimulates LH
- peak in LH causes ovulation

Luteal phase
- fall in LH Corpus luteum forms
- Corpus luteum releases progesterone
- progesterone maintains the endometrium and inhibits FSH and LH