end of year revision part 2 AND EXPERIMENTS

Question 1

in the spinal cord what is the white and grey matter?

Answer 1

grey matter is tissue in the middleSave of the spinal cord and outer part of the brain consist mainly of nerve cell bodies

white matter is tissue in the piter part of the spinal cord and inner part of the brain consist mainly of myelin sheath

Question 2

ANSWER THE QUESTION

Answer 2

Question 3

• Explain how the rate of photosynthesis is affected by changes to abiotic (non-living) factors throughout the day
• Explain how very high temperatures might reduce the growth of plants.

Answer 3

temperature

light (intensity)

carbon dioxide / CO2

stated effect on rate of photosynthesis;

• 1. less photosynthesis; 2. (more) transpiration / evaporation / loss of water / eq; 3. wilting / loss of turgor / stomata close / less mineral ion transport; 4. less carbon dioxide uptake; 5. enzymes denature / change in shape of active site / eq;

Question 4

define the term excretion

Answer 4

removal from the body of the waste products of metabolism

Question 5

define the term balanced diet

Answer 5

diet containing all the necesry foor types and in the correct amounts and proportions to keep the body healthy

Question 6

Name the following

has molecules that are to large to pass through the capillaries

is all reabsorbed in the kidney

is a metabolic waste product

Answer 6

has molecules that are to large to pass through the capillaries

protein

is all reabsorbed in the kidney

glucose

is a metabolic waste product

urea

Question 7

what are the factors affecting the rate of diffusion?

Answer 7