Checkpoint: Control of Heart Rate

What part of the heart initiates the heartbeat?

• Bundle of His

• Sinoatrial node

• Atrioventricular node

• Myogenic nodule

What part of the brain unconsciously controls heart rate?

• Cerebellum

• Cerebral cortex

• Medulla oblongata

• Corpus Callosum

Where is the SAN located?

• A

• B

• C

• D

Which label indicates the Bundle of His?

• A

• B

• C

• D

Where are the chemoreceptors found that are involved in heart rate control?

• Aorta and carotid. artery

• Carotid artery and vena cava.

• Ventricles and atria.

• Aorta, carotid artery, medulla.

What system are the sympathetic and parasympathetic neurones part of?

• Voluntary

• Autonomic

Which neurone is responsible for increasing heart rate?

• Parasympathetic

• Sympathetic

What neurotransmitter is released to increase impulses from the SAN?

• Acetylcholine

• Adrenaline

• Noradrenaline

• Dopamine

What neurotransmitter is released to decrease impulses from the SAN?

• Acetylcholine

• Adrenaline

• Noradrenaline

• Dopamine