WorksheetsUnderstanding the Heart and CPR
Total questions: 1
Worksheet time: 15mins
1-10.
Answer the questions below after watching the video
What is the common reaction in TV shows when a patient's heart stops?
The scene usually cuts to the next scene without action.
Doctors use defibrillators to 'shock' the heart.
Doctors use a stethoscope to listen to the heart.
The patient is immediately declared dead.
What primarily differentiates cardiac muscle from skeletal muscle?
Cardiac cells are interconnected, while skeletal muscle cells are not.
Skeletal muscle cells can generate their own electricity.
Cardiac muscle cannot contract.
Cardiac muscle is not striated.
How are cardiac cells different in appearance from skeletal muscle cells?
Cardiac cells are longer and thinner.
Cardiac cells have multiple nuclei.
Cardiac cells are branched and interconnected.
Skeletal muscle cells contain more mitochondria.
What is the main function of pacemaker cells in the heart?
To pump blood throughout the body.
To stop the heart during cardiac arrest.
To generate their own action potentials.
To contract in response to brain signals.
What triggers the action potentials in most body cells?
An external stimulus or a neighboring cell.
A direct command from the brain.
An internal clock in each cell.
The presence of calcium ions.
What is the role of the SA node in the heart?
It stops the heart during fibrillation.
It generates action potentials for skeletal muscles.
It pumps blood to the rest of the body.
It acts as the heart's natural pacemaker.
Why is there a delay when the electrical signal reaches the AV node?
Because of a defect in the heart's electrical system.
To slow down the heart rate.
To allow the atria to finish contracting before the ventricles contract.
To give the ventricles time to fill with blood without contracting.
What does a defibrillator do to the heart?
It decreases the heart rate.
It increases the heart rate.
It stops the heart to reset its rhythm.
It restarts the heart by providing a steady beat.
Why can't CPR correct fibrillation on its own?
Because it's not a medically approved method.
Because it's only a temporary solution.
Because it only works on TV.
Because it cannot generate electrical impulses.
What misconception do TV shows often spread about defibrillators?
That they are harmful to patients.
That they are only used in cases of drowning.
That they immediately restart the heart.
That they can't be used in hospitals.
