Autonomic Nervous System Quiz

What is the overall role of the autonomic nervous system?

• Voluntary muscle movement

• Regulation of involuntary bodily functions

• Thought processes and reasoning

• Memory and learning

What are the two branches of the autonomic nervous system?

• Sympathetic and Parasympathetic

• Central and Peripheral

• Sensory and Motor

• Reflexive and Active

How does the sympathetic nervous system affect heart rate?

• It decreases heart rate

• It has no effect on heart rate

• It increases heart rate

• It keeps heart rate constant

How does the parasympathetic nervous system affect heart rate?

• It increases heart rate

• It decreases heart rate

• It does not affect heart rate

• It causes arrhythmia

What does it mean for heart muscle to be 'myogenic'?

• It needs nerve signals to contract

• It contracts without external stimuli

• It cannot contract on its own

• It requires constant oxygen supply

What is the role of the sinoatrial node (SAN)?

• To contract the ventricles

• To initiate and regulate the heartbeat

• To send signals to the brain

• To control blood pressure

Name the three structures involved in propagating a heartbeat in the correct order.

• SAN, AVN, Purkinje fibers

• AVN, SAN, Purkinje fibers

• SAN, Purkinje fibers, AVN

• AVN, Purkinje fibers, SAN

How is a heartbeat initiated?

• Electrical impulse starts at AVN and moves to SAN

• Electrical impulse starts at SAN, causing atria to contract

• Electrical impulse starts in the ventricles

• Electrical impulse starts in the brain

What part of the brain controls heart rate?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Hippocampus

What type of receptor detects a fall in blood pressure?

• Thermoreceptor

• Baroreceptor

• Chemoreceptor

• Photoreceptor