B5

Question 1

Homeostasis

Answer 1

Maintaining a stable internal environment

Question 2

Central Nervous System

Answer 2

In vertebrates only has the brain and spinal cord. In mammals its connected by sensory and motor neurons

Question 3

Sensory Neurons

Answer 3

Carries information as electrical impulses from receptors to CNS

Question 4

Motor Neurons

Answer 4

Carries electrical impulses from CNS to effectors

Question 5

Effectors

Answer 5

All muscles and glands which respond to nervous impulses

Question 6

Order of a Response

Answer 6

Stimulus, receptor, sensory neurone, CNS, motor neurone, effector, response

Question 7

Pituitary Gland

Answer 7

Produces many hormones that regulate body conditions, these hormones act on other glands

Question 8

Thyroid

Answer 8

Produces thyroxine which regulates temperature, heart rate and rate of metabolism

Question 9

Ovaries

Answer 9

Produces oestrogen

Question 10

Adrenal Gland

Answer 10

Produces adrenaline which prepares body for fight or flight response

Question 11

Testes

Answer 11

Produces testosterone

Question 12

Pancreas

Answer 12

Produces insulin which regulates blood glucose levels

Question 13

Blood Glucose Level is too High

Answer 13

Insulin is secreted by pancreas which stores the glucose in the liver and muscles as glycogen

Question 14

Blood Sugar Levels are too Low

Answer 14

Glucagon is secreted by pancreas which makes liver turn glycogen to glucose

Question 15

Type 1 Diabetes

Answer 15

Born with it, not enough insulin is created, inject insulin several times throughout the day mostly at mealtimes which makessure glucose is removed

Question 16

Type 2 Diabetes

Answer 16

Develop it if you become overweight, resistant to their own insulin, controlled by exercise and controlled diet

Question 17

Menstrual Cycle Stages

Answer 17

Day 1-4: Uterus lining breaks down
Day 4-14: The uterus lining builds up into a thick layer full of blood vessels to receive a fertilised egg
Day 14: An egg develops and is released
Day 14-28: If no fertilised egg lands on the uterus wall, the lining breaks again

Question 18

FSH

Answer 18

Produced in the pituitary gland, causes egg to mature, stimulates ovaries to produce oestrogen

Question 19

LH

Answer 19

Produced in pituitary gland, stimulates egg release

Question 20

Oestrogen

Answer 20

Produces in ovaries, causes lining in the uterus to grow, stimulates release of LH

Question 21

Progesterone

Answer 21

Produces in ovaries, maintains lining in uterus, inhibits the release of LH and FSH