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1. Where is the normal heart rate generated? a. all of the answers are correct b

ID: 3520997 • Letter: 1

Question

1. Where is the normal heart rate generated?

a. all of the answers are correct

b. cardiovascular center in medulla

c. sinoatrial node

d. atrioventricular node

2.Which of the following is NOT a correct match of EKG signal and heart conduction?

a. T wave: ventricular repolarization

b. P wave: atrial depolarization

c. QRS complex: atrial repolarization

d. QRS complex: ventricular depolarization

3. Which of the following is true regarding the CNS control of the heart rate?

a. vagus nerve carries parasympathetic signals to lower heart rate

b. the cardiovascular center does not need sensory information in order to initiate a motor response

c. cardiac accelerator nerves carry parasympathetic signals to elevate heart rate

d. the cerebrum and limbic system do not affect heart rate

Explanation / Answer

Ans. c   A small mass of cardiac muscle found in the wall of right atrium that why heart rate generated in the sinoatrial node

Ans. c

Ans. a   Vagus nerve also called tenth cranial nerve It is longest and most complex cranial nerve. It is runs from the brain through the face and thorax to the abdomen. It is a mixed nerve that contains parasymphathetic fibers which interfaces with the cranial nerve and control heart, lungs and digestive tract.    

  1. Where is the normal heart rate generated?

Ans. c   A small mass of cardiac muscle found in the wall of right atrium that why heart rate generated in the sinoatrial node

  1. Which of the following is NOT a correct match of EKG signal and heart conduction?

Ans. c

  1. Which of the following is true regarding the CNS control of the heart rate?

Ans. a   Vagus nerve also called tenth cranial nerve It is longest and most complex cranial nerve. It is runs from the brain through the face and thorax to the abdomen. It is a mixed nerve that contains parasymphathetic fibers which interfaces with the cranial nerve and control heart, lungs and digestive tract.    

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