definitions

Question 1

glycogenesis

Answer 1

making glycogen from glucose
stimulated by insulin

Question 2

positive feedback

Answer 2

stimulus causes changes that result in an even greater deviation from the normal

Question 3

glycogenolysis

Answer 3

breaking down stored glycogen into glucose

Question 4

glyconeogenesis

Answer 4

synthesis of glucose from non carbohydrate molecules

Question 5

what hormone does a (alpha) cells secrete

Answer 5

glucagon

Question 6

what hormone does b (beta cells) secrete?

Answer 6

insulin

Question 7

hormone

Answer 7

chemical messenger

Question 8

compare nerve impulses and hormones (3 marks)

Answer 8

1) nerve impulses are very quick, hormones are slower
2) hormones can act on any target cell, nerve impulses are localised
3) hormones last longer, nerve impulses do not (neurotransmitters broken down)

Question 9

fibrous capsule

Answer 9

outer membrane that protects kidneys

Question 10

cortex

Answer 10

lighter coloured outer region, made of nephrons, filters blood

Question 11

nephron?

Answer 11

long tubules with bundles of capillaries where the blood is filtered

Question 12

medulla

Answer 12

darker inner region made of loop of henley

Question 13

renal pelvis

Answer 13

funnel shaped cavity that collects urine into ureter

Question 14

ureter

Answer 14

a tube that carries urine into bladder

Question 15

renal artery

Answer 15

supplies the kidney with blood from the heart via aorta

Question 16

ultrafiltration?

Answer 16

the filtering of substances out of the blood

Question 17

what is selective reabsorption?

Answer 17

the reabsorption of useful substances and the right volume of water into the blood