SRMERFS

Question 1

write an SRMERF for an increase in temperature

Answer 1

S- increase in temperature

R- peripheral thermoreceptors in skin and central thermorecptors

M- hypothalamus

E- muscle or gland (e.g sweat glands stimulate the production of sweat)

R- sweat moves to the surface of the skin and is evaporated

F- decrease in temperature

Question 2

write an SRMERF for an increase in CO2/increase in H/ low pH

Answer 2

S- increase in CO2/increase in H/ low p

R- peripheral chemoreceptors in the carotid and aortic bodies and central chemoreceptors in the medulla oblongata

M- medulla oblongata

E- increase nervous stimulation to the intercostal muscles and diaphragm (by the intercoastal nerve and phrenic nerves)

R- increase in rate and depth of breathing

F- decrease in CO2/decrease in H/ high pH

Question 3

write an SRMERFS for an increase in osmotic pressure/ decrease in water concentration

Answer 3

S- increase in osmotic pressure/ decrease in water concentration

R- osmoreceptors in the hypothalamus

M- hypothalamus

E- hypothalamus stimulates the release of ADH by the posterior pituitary gland ( via nervous impulse)

R- ADH works on the distal convoluted tract and common collecting duct in the nephron to increase permeability to water, increasing absorption of water in the blood

F- decrease in osmotic pressure/increase in water concentration

Question 4

write an SRMERF for the thirst reflex

Answer 4

S- increase in osmotic pressure/decrease in water concentration

R- osmoreceptors in the thirst centre hypothalamus

M- thirst centre in the hypothalamus

E- hypothalamus causes the person to feel thirsty

R- person gets a drink, water is absorbed into the blood from the alimentary canal and then into tissue fluid

F- decrease in osmotic pressure/ increase in water concentration

Question 5

write an SRMERF for an increase in blood glucose

Answer 5

S- increase in blood glucose

R- chemoreceptors in the islets of Langerhans (pancreas)

M-beta cells in the islets of Langerhans (pancreas)

E- beta cells release insulin

R- insulin increases the uptake of glucose into cells, promotes glycogenesis, promotes fat storage and protein synthesis

F- decrease in blood glucose

Question 6

write an SRMERF for a decrease in blood glucose levels

Answer 6

S- decrease in blood glucose

R- chemoreceptors in the islets of Langerhans (pancreas)

M- alpha cells in the islets of Langerhans (pancreas)

E- alpha cells release glucagon

R- glucagon promotes glycogenolysis (glycogen into glucose), promotes gluconeogenesis (from fats, lipolysis and amino acids)

F- increase in blood glucose