Neural Control Mechanisms

Question 1

What does the CNS (central nervous system) consist of

Answer 1

Brain and spinal cord

Question 2

What does the sympathetic nervous system do

Answer 2

Speeds up the heart rate via the release of the stress hormone adrenaline

Question 3

What does the parasympathetic nervous system do

Answer 3

Slows down the heart rate via vagus nerve and the release of the hormone acetylcholine 

Question 4

What is the medulla oblongata

Answer 4

Part of the brain that regulates processes

Question 5

What do chemoreceptors do

Answer 5

Detect change in carbon dioxide levels or change in pH (blood acidity)

Question 6

What do proprioreceptors do

Answer 6

Detect change in muscle movement

Question 7

What do baroreceptors do

Answer 7

Detect change in blood pressure

Question 8

What is adrenaline

Answer 8

It is a stress hormone that is released before and during exercise to increase/speed up heart rate

Question 9

What is anticipatory rise

Answer 9

Increase in heart rate before exercise due to the release of adrenaline

Question 10

What does CCC stand for

Answer 10

Cardiac control centre

Question 11

How to increase the heart rate during exercise (7 steps)

Answer 11

• Exercise
• Increase in CO2
• Detected by chemoreceptors
  message to the medulla (C.C.C)
• Increase impulses to sympathetic nervous system- adrenaline
• Decrease impulses to
  parasympathetic nervous system via vagus nerve
• Increase in Heart rate