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Choose all the statements that are correct. When the heart beats, first the right side of the heart contracts, and then the left side of the heart contracts. That is one heartbeat. The sympathetic nervous system speeds up the heart rate and the parasympathetic system slows down heart rate. M Bradycardia is when the heart beats faster than normal. The SA node is the pacemaker of the heart. Coronary arteries deliver blood to the muscle of the heart. A heart attack is a myocardial infarction. The ECG (EKG) has a QRS wave that represents ventricular depolarization (the message to tell the ventricle to contract. The heart needs nerve stimulation in order to contract.

Choose all the statements that are correct. When the heart beats, first the right side of the heart contracts, and then the left side of the heart contracts. That is one heartbeat. The sympathetic nervous system speeds up the heart rate and the parasympathetic system slows down heart rate. M Bradycardia is when the heart beats faster than normal. The SA node is the pacemaker of the heart. Coronary arteries deliver blood to the muscle of the heart. A heart attack is a myocardial infarction. The ECG (EKG) has a QRS wave that represents ventricular depolarization (the message to tell the ventricle to contract. The heart needs nerve stimulation in order to contract.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Statements About Heart Functionality:** 1. **Incorrect**: When the heart beats, first the right side of the heart contracts, and then the left side of the heart contracts. That is one heartbeat. 2. **Correct**: The sympathetic nervous system speeds up the heart rate and the parasympathetic system slows down heart rate. 3. **Incorrect**: Bradycardia is when the heart beats faster than normal. - *Explanation*: Bradycardia is when the heart beats slower than normal. 4. **Correct**: The SA node is the pacemaker of the heart. 5. **Incorrect**: Coronary arteries deliver blood to the muscle of the heart. - *Explanation*: Though this statement sounds true, it was not selected as correct in the provided image. It may have been left unchecked inadvertently. 6. **Correct**: A heart attack is a myocardial infarction. 7. **Correct**: The ECG (EKG) has a QRS wave that represents ventricular depolarization (the message to tell the ventricle to contract). 8. **Incorrect**: The heart needs nerve stimulation in order to contract. - *Explanation*: The heart can generate its own electrical impulses independent of nerve stimulation due to the pacemaker cells.
Transcribed Image Text:**Statements About Heart Functionality:** 1. **Incorrect**: When the heart beats, first the right side of the heart contracts, and then the left side of the heart contracts. That is one heartbeat. 2. **Correct**: The sympathetic nervous system speeds up the heart rate and the parasympathetic system slows down heart rate. 3. **Incorrect**: Bradycardia is when the heart beats faster than normal. - *Explanation*: Bradycardia is when the heart beats slower than normal. 4. **Correct**: The SA node is the pacemaker of the heart. 5. **Incorrect**: Coronary arteries deliver blood to the muscle of the heart. - *Explanation*: Though this statement sounds true, it was not selected as correct in the provided image. It may have been left unchecked inadvertently. 6. **Correct**: A heart attack is a myocardial infarction. 7. **Correct**: The ECG (EKG) has a QRS wave that represents ventricular depolarization (the message to tell the ventricle to contract). 8. **Incorrect**: The heart needs nerve stimulation in order to contract. - *Explanation*: The heart can generate its own electrical impulses independent of nerve stimulation due to the pacemaker cells.
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