Practical Five

Question 1

what is the set point of the concentration of glucose in blood

Answer 1

5 mmol/L

Question 2

what occurs when glucose is absorbed from digestive tract after meal

Answer 2

blood levels increase

Question 3

what occurs when glucose is absorbed into cells

Answer 3

concentration in the blood falls and insulin secretion is reduced

Question 4

diabetes is caused by 2 problems..

Answer 4

• failure of pancreas to secrete adequate amounts of insulin (type 1)

0 inadequate response of tissues to insulin (type 2 )

Question 5

when blood glucose levels increase beyond normal homeostatic range of 4-6 which hormone is released and how does it lower blood glucose levels

Answer 5

• insulin is released

- it lowers blood glucose levels by increasing absorption of glucose into cells out of the blood stream

Question 6

consider the subject who didnt consume any food.

How is their blood glucose levels maintained and what hormones are involved

Answer 6

Glucagon encourages the breakdown of stored glycogen into glucose b/w meals when fasting

Question 7

type one diabetes

Answer 7

• not enough insulin is produced

- beta cells destroyed by immune system

Question 8

type two diabetes

Answer 8

makes insulin but is resistant

Question 9

gestational diabetes

Answer 9

high levels of oestrogen and progesterone providing temporary resistance to insulin

Question 10

insipidus diabetes

Answer 10

ADH hormone is low = thirst and urine output

Question 11

what is a glucose tolerance test

Answer 11

measures ability to break down and use glucose

Question 12

what response to a glucose tolerance test would be found in a normal individual

Answer 12

6 - 7 mmol/Lafter 2 hrs or 4-6 when fasting

Question 13

what response to a glucose tolerance test would be found in a diabetic

Answer 13

> 11.1 mmol/L

Question 14

hyperglycaemic

Answer 14

abnormally high blood glucose levels