Brain & HR

Question 1

Function of Cerebellum

Answer 1

Balance and fine coordination of movement
Judging position of objects
Tension muscle for playing musical instruments
Riding a bike

Question 2

Function of cerebrum

Answer 2

Higher brain functions:

• conscious thought
• emotional responses
• factual memory

Question 3

Function of Hypothalamus

Answer 3

Coordinates homeostatic response

Question 4

Function of medulla oblongata

Answer 4

Sends action potential through autonomic nervous system

Question 5

Function of pituitary gland

Answer 5

Posterior lobe
- Releases ADH produced in hypothalamus
Anterior lobe
-releases hormones according to hypothalamus

Question 6

Hypothalamus releases hormones for fight or flight

Answer 6

CRH

TRH

Question 7

Response to CRH Pituitary secretes

Answer 7

ACTH

Question 8

Response to TRH pituitary secretes

Answer 8

TSH

Question 9

ACTH stimulates

Answer 9

Adrenal cortex to secrete corticoid hormones

Question 10

TSH stimulates

Answer 10

Thyroid gland to secrete thyroxine

Question 11

Function of thyroxine

Answer 11

Increases metabolic rate

Makes cells more responsive to Adrenalin

Question 12

Function of corticosteroid hormones

Answer 12

Regulate metabolism of carbohydrates

Question 13

What regulates the frequency of the heart

Answer 13

Cardiovascular centre

In medulla oblongata

Question 14

Increase HR

Answer 14

Sympathetic nerves (accelerans nerve)
Releases noradrenalin at SA node

Question 15

Decrease HR

Answer 15

Action potential down vagus nerve

Acetylcholine

Question 16

Early warning system for HR

Answer 16

Stretch receptors in muscles send impulses to cardiovascular centre
Chemoreceptors monitoring pH of blood (carbon dioxide)