Homeostasis

Question 1

Homeostasis

Answer 1

Maintaining internal conditions

Question 2

Homeostasis pathway

Answer 2

1) receptor = identifies the change to the body
2) control centre= initiates the corrective measures
3) effector = carries out the corrective measure

Question 3

Body temperature

Answer 3

High = receptors on the skin detect the temperature increase and the hypothalamus initiates vasodilation and sweating

Low = skin receptors detect the temperature decrease and the hypothalamus initiates vasal constriction, shivering and piloerection

Question 4

Blood pressure

Answer 4

Low = detected by baroreceptors in artery walls so signal sent via medulla oblangaba to the heart to increase heart rate and cardiac output

High = baroreceptors cause medulla oblangatato send signals to decrease heart rate

Question 5

Blood glucose

Answer 5

High= glucose receptors detect the rise so the pancreas secretes insulin which increase glucose absorption into the cells

Low = pancreas secretes less insulin so less glucose is absorbed and glycogenolysis happens

Question 6

Blood volume

Answer 6

High= atrial receptors cause the kidneys to increase urine volume

Low = kidneys decrease water absorption and decrease urine volume

Question 7

Feedback

Answer 7

Negative = returns environment back towards set point

Positive = pushes environment further from set point ( eg: oxytocin in childbirth )