HOMEOSTASIS

Question 1

UNCONSCIOUS ACTION MNEMONIC

Answer 1

Question 2

CONSCIOUS ACTION MNEMONIC

Answer 2

Question 3

IRIS REFLEX: Bright light()

Answer 3

Circular muscles contract
Radial muscles relax
So Iris is smaller

Question 4

IRIS REFLEX: Dim light

Answer 4

Circular muscles relax
Radial muscles contract
Iris is larger

Question 5

ACCOMODATION: DISTANT OBJECTS

Answer 5

Instead of lens tighten, lens = pulled taut*

Question 6

ACCOMODATION: NEAR OBJECT

Answer 6

Question 7

BLOOD GLUCOSE: TO HIGH

Answer 7

After a meal
Blood glucose is high, which is detected by the pancreas
The pancreas releases insulin into the blood stream
Insulin travels and binds to a receptor on liver cells
Liver converts and stores glucose as glycogen
Blood glucose decreases

Question 8

BLOOD GLUCOSE: TOO LOW

Answer 8

After exercise or a fast
Blood glucose levels are too low
Decrease is detected by the pancreas
Pancreas releases glucagon
Glucagon travels in the blood stream and binds to a receptor on liver cells Liver
Liver converts glycogen back into glucose
Blood glucose conc increases

Question 9

REQUIRED PRACTICAL 7: REACTION TIME

Answer 9

Question 10

REQUIRED PRACTICAL 8: PLANT RESPONSES

Answer 10