Heart Rate Regulation

Question 1

Where does the Cardiac Control Centre receive info from and top?

Answer 1

sensory nerves and sends direction through motor nerves to alter HR

Question 2

3 main control mechanisms that determine the action of the CCC

Answer 2

Neural control
Intrinsic control
Hormonal control

Question 3

What receptors are in the neural control?

Answer 3

Chemoreceptors-located in muscles and inform the ccc of chemical changes in the blood stream e.g lattice acid
Proprioceptors-located in muscles, tendons, joints and inform the ccc of motor activity
Baroreceptors- located in blood vessel walls inform ccc of increased blood pressure

Question 4

What does intrinsic control detect?

Answer 4

-Temperature changes will effect viscosity of blood and speed of nerve transmission

-Venous return changes will affect the stretch of ventricular walls, force of ventricular contraction therefore stroke volume.

Question 5

What does hormonal control release?

Answer 5

Adrenaline and noradrenaline released from adrenal glands increasing force of ventricular contraction and increasing spread of electricity through heart.

Question 6

If an increase in HR is required what is required?

Answer 6

Sympathetic nervous system

Question 7

if a decrease inHR is required what is required?

Answer 7

parasympathetic nervous system