Homoeostasis

Question 1

What is our normal body temperature

Answer 1

37°C

Question 2

What are the two temperatures that result in death

Answer 2

26°C and 42°C

Question 3

What is hyperglycaemia

Answer 3

Too much glucose in blood.

Question 4

What is hypoglycaemia

Answer 4

Two little glucose in blood

Question 5

What happens when you eat a bar of chocolate

Answer 5

1) chocolate is digested
2) glucose is absorbed into bloodstream
3) levels of glucose in blood are high
4) pancreas detects high levels of blood glucose
5) pancreas secretes insulin into blood
6) insulin is carried into the bloodstream
7) insulant binds to receptors on the liver and muscle cells
8) liver and muscle cells take up glucose
9) glucose is converted into glycogen for storage
10) blood glucose levels drop

Question 6

What happens when you run to school

Answer 6

1) rate of respiration increases - glucose is taken out of bloodstream
2) levels of glucose in the blood a low
3) thank Chris the text no levels of blood glucose and secretes glucagon into blood
4) Glucagon is carried in the blood stream
5) glucagon binds to receptors on liver and muscle cells
6) glucagon is converted into glucose
7) muscle cells use glucose for respiration or release it into the bloodstream. Liver cells release glucose
8) blood glucose levels rise

Question 7

What is diabetes

Answer 7

Deficient insulin production causing dangerously high blood sugar levels
- symptoms are frequent urination and dehydration

Question 8

What does not happen in type 1 diabetes

Answer 8

Pancreas does not secrete insulin into the blood

Question 9

What does not happen during Type II diabetes

Answer 9

The incident does not bind to receptors on never all muscle files so they have to control diet and exercise

Question 10

What is thermo regulation

Answer 10

The ability of the body to keep its temperature close to 37°C
Important so that all chemical reactions taking place in cells can do so at a steady rate. At high temperatures enzymes get destroyed

Question 11

What happens to your hair skin etc when it’s too hot

Answer 11

1) hair lies flat so more heat is lost by radiation
2) arterioles in skin widen (vasodilation) they allow more blood to flow through capillaries in skins surface. so more heat is lost by radiation
3) sweat glands open. The sweat evaporates and this cools you down
4) changes in behaviour e.g. Undressing, moving into shade

Question 12

What happens to your hair skin etc when it’s too cold

Answer 12

1) the hair erector muscles contract pulling their hair up. This traps which is a poor conductor of heat and so less heat is lost
2) arterioles in the skins surface narrow (Vasco constriction) less blood flows into capillaries on the skins surface, so heat is lost by radiation
3) sweat glands clothes and less sweat is produced
4) shivering
5) General increase in metabolic rate
6) changes in behaviour e.g. dressing, moving into sun and activity

Question 13

What is homeostasis

Answer 13

The maintenance of a stable internal environment in the body despite changes in the external environment