endocrine system

Question 1

purpose of endocrine system?

Answer 1

mainly for homeostasis and regulating the body’s chemical reactions

Question 2

role of the pancreas?

Answer 2

regulates blood glucose
islet of Langerhans which have cells producing insulin and glucagon

Question 3

alpha cells make…

Answer 3

glucagon

Question 4

beta cells make…

Answer 4

insulin

Question 5

blood glucose negative feedback mechanism?

Answer 5

blood glucose is high- insulin is secreted causing liver to convert blood glucose into glycogen (lowers blood glucose concentration)
blood glucose is low- glycogen is secreted causing the liver to hydrolyse its stored glycogen to glucose (increases blood glucose concentration)

Question 6

7 parts of the kidney?

Answer 6

1. cortex
2. pelvis renal artery
3. pyramid
4. renal artery
5. capsule
6. medulla
7. ureter

Question 7

role of Bowman’s capsule?

Answer 7

ultrafiltration of the blood and produces glomerular filtrate in the production of urine

Question 8

role of proximal convoluted tubule ?

Answer 8

adapted to selectively reabsorb useful materials such as glucose and amino acid to the peritubular capillaries

Question 9

role of loops of Henle ?

Answer 9

concentrate salts in the tissue fluid of the medulla which causes an osmotic flow of water out of he collecting ducts

Question 10

role of ADH secretion ?

Answer 10

negative feedback

Question 11

what are detectors ?

Answer 11

osmoreceptors in the hypothalamus

Question 12

what are coordinators ?

Answer 12

posterior lobe of pituitary secreting ADH

Question 13

role of ADH ?

Answer 13

makes the plasma membranes of the distal convoluted tubule cells and collecting duct cells
more permeable to water
water is reabsorbed by osmosis from the filtrate into surrounding tissue fluid