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Biomedical Engineering Chapter 2: Cardiac Cycle Calculation Quiz

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Questions and Answers

Which of the following represents the volume of blood in the ventricle at the end of diastole?

End-diastolic volume (correct)
End-systolic volume
Stroke volume
Cardiac output

In the cardiac cycle, what term refers to the volume of blood in the ventricle at the end of systole?

Stroke volume
Cardiac output
End-systolic volume (correct)
End-diastolic volume

Which term describes the amount of blood pumped by each ventricle in one minute?

End-diastolic volume
Cardiac output (correct)
End-systolic volume
Stroke volume

What does an Electrocardiogram (ECG or EKG) measure?

Electrical activity of the heart (B) Signup and view all the answers

What is the term for the volume of blood ejected from the heart with each contraction?

Stroke volume (A) Signup and view all the answers

Which term describes the percentage of blood pumped out of the ventricle during each heartbeat?

Ejection fraction (A) Signup and view all the answers

What happens to stroke volume when end-systolic volume increases?

It decreases (C) Signup and view all the answers

In terms of the cardiac cycle, what does end-diastolic volume represent?

Volume of blood in the ventricle at the end of diastole (B) Signup and view all the answers

What is cardiac output a measure of in relation to heart function?

Amount of blood pumped by each ventricle per minute (C) Signup and view all the answers

What happens during the repolarization phase of an action potential?

Sodium channels are inactivated, potassium channels open, and the membrane cannot depolarize again (C) Signup and view all the answers

What is the primary function of neurotransmitters in chemical synapses?

To convert electrical energy to chemical energy and then back to electrical energy (A) Signup and view all the answers

Which of the following best describes the process of neurotransmitter release at the presynaptic terminal?

Vesicles containing neurotransmitters move to the synapse and release their contents via exocytosis (C) Signup and view all the answers

What is the primary mechanism by which an action potential propagates along an axon without decreasing in amplitude?

An all-or-none signal that does not decrease in amplitude (D) Signup and view all the answers

What is the primary role of vesicles in the presynaptic terminal?

To store and release neurotransmitters in response to action potentials (D) Signup and view all the answers

Which of the following best describes the process of synaptic transmission?

Neurotransmitters are released, diffuse across the synaptic gap, and elicit a response in the postsynaptic cell (D) Signup and view all the answers

What is the primary function of the synaptic gap in chemical synapses?

To facilitate the diffusion of neurotransmitters from the presynaptic to postsynaptic terminal (C) Signup and view all the answers

What is the primary mechanism by which neurotransmitters elicit a response in the postsynaptic cell?

By binding to specific receptors on the postsynaptic membrane (D) Signup and view all the answers

Which of the following is not a step in the process of synaptic transmission?

Neurotransmitters are actively transported back into the presynaptic terminal (C) Signup and view all the answers

What is the primary advantage of the all-or-none nature of action potentials propagating along an axon?

It provides an effective signaling method over large distances without decreasing in amplitude (D) Signup and view all the answers

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