Practice Heartbeat Regulation (6.2.5) - Human Physiology - IB 12 Biology
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Heartbeat Regulation

Practice - Heartbeat Regulation

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is the primary function of the SA node?

💡 Hint: Think of the heart's conductor.

Question 2 Easy

True or False: The AV node amplifies the electrical signal from the SA node.

💡 Hint: Delay is the keyword here.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What structure is known as the heart's pacemaker?

Atrioventricular Node
Sinoatrial Node
Bundle of His

💡 Hint: It's the one that starts the beat.

Question 2

True or False: The AV node is responsible for speeding up the heart rate.

True
False

💡 Hint: Think about its function separation.

2 more questions available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Describe what could happen if the AV node experiences a blockage. How would this affect heart function?

💡 Hint: Think about the timing mismatch between chambers.

Challenge 2 Hard

In a case of severe physical stress, analyze how the heart rate is impacted by both branches of the autonomic nervous system.

💡 Hint: Consider the body’s 'fight or flight' reaction.

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Reference links

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