CONTROL MECHANISMS

Question 1

HORMONAL: what is released, when is it released, where is it released from, and what does it do?

Answer 1

ADRENALINE AND NORADRENALINE
Released before/after exercise
Released from ADRENAL GLANDS into blood stream
INCREASE THE FORCE OF VENTRICULAR CONTRACTION (SV) and spread of electrical activity through the heart.

Question 2

INTRINSIC:
What does temperature effect?
What does venous return effect?

Answer 2

Temperate affects the VISCOSITY OF THE BLOOD and the SPEED of NERVE TRANSMISSION

Venous Return affects the STRETCH OF THE WALLS and therefore the FORCE OF CONTRACTION

Question 3

NEURAL:
What do CHEMORECEPTORS do?
Example: during/after exercise.

Answer 3

Detect chemical changes.
Found in aorta and carotid arteries
Send CCC messages about pH, oxygen, carbon dioxide and lactic acid in the body

DURING) oxygen decrease 
                 pH decrease 
                 carbon dioxide increase 
                 lactic acid increase 
AFTER) oxygen increase 
              pH increase 
              carbon dioxide decrease 
              lactic acid decrease

Question 4

NEURAL:
What do proprioreceptors do?
Examples: During/After exercise

Answer 4

Defect movement (motor activity) 
Found in muscles, joints and tendons 
Send CCC message if motor activity changes 

DURING) motor activity increases
AFTER) motor activity decreases

Question 5

NEURAL:
What do baroreceptors do?
Example: DURING/After exercise.

Answer 5

Detect blood vessel walls stretching
Found in blood vessels and walls of the aorta and carotid arteries
Send CCC message is blood pressure changes

DURING) increases
AFTER) decreases