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Question 1

what are cells refered to as

Answer 1

building blocks off living organisms

Question 2

tissue def

Answer 2

group of similar cells working together

Question 3

organ def

Answer 3

a group of different tissues working together

Question 4

organ system def

Answer 4

a group of different organs working together.

Question 5

what do the organs work together to do in the digestive system

Answer 5

digest and absorb nutrients

Question 6

enzymes are biological…
ands are …

Answer 6

catalysts, specialized proteins

Question 7

describe the enzyme function

Answer 7

lock and key

Question 8

what does a substrate bind to

Answer 8

active site on an enzyme

Question 9

what happens to the enzyme when denatured

Answer 9

changes shape, active site no longer fits

Question 10

what causes enzymes to denature (2)

Answer 10

high temp and wrong ph

Question 11

What do carbohydrase enzymes break down carbohydrates into

Answer 11

simple sugars

Question 12

what does amylase break into sugars

Answer 12

starch

Question 13

what do lipase break down and what do they turn into (3)

Answer 13

fat, fatty acids, glycerol

Question 14

protease break down protein into what

Answer 14

amino acids

Question 15

wheres bile made and stored in

Answer 15

liver, gall bladder

Question 16

purpose of bile (2)

Answer 16

neutralise substances from sto,ach and helps emulsify fats

Question 17

what does iodine test for and what colour does it go when present/ not

Answer 17

starch
present - blue black
not - yellow

Question 18

what does benedicts test for and what colour does it go when present/ not

Answer 18

sugar
present - brick red
not - blue

Question 19

what does biuret reagent test for and what colour does it go when present/ not

Answer 19

protein
present - purple
not - blue

Question 20

what does ethanol test for and what colour does it go when present/ not

Answer 20

fats
present - cloudy
not - clear

Question 21

what is the circulatary sytem made of
(4)

Answer 21

arteries, veins, capillaries and the heart

Question 22

what are arteries specialised with

Answer 22

thick elastic walls and a small lumen

Question 23

how thick are the capillary walls and what does this mean

Answer 23

one cell thick, so there is a short distance for diffusion

Question 24

what 3 things do veins have

Answer 24

valves, thinner and less elastic walls and a larger lumen

Question 25

name the 7 things that construct the main structure of the heart

Answer 25

the aorta, vena cava, pulmonary artery,
pulmonary vein, valves, atria and ventricles

Question 26

what is heart rate is controlled by

Answer 26

a group of cells that act as a pacemaker

Question 27

where are the pacemaker cells located

Answer 27

right atrium