Cardiovascular System 3, Heart, electrical system
ฝัง
- เผยแพร่เมื่อ 15 มิ.ย. 2024
- Check out my videos on all body systems, for example this series is on the nervous system, www.youtube.com/watch?v=
The electrical activity for the contraction of the heart is initiated by the:
a. sinoatrial node
b. atrioventircular node
c. medulla oblongata
d. myocytes
The only point of electrical conduction between the atria and the ventricles is provided by the;
a. Sinoatrial node
b. Atrioventricular node
c. Atrioventricular bundle
d. Purkinje fibres
The electrical impulses from the atrial myocardium are collected by the
a. Sinoatrial node
b. Atrioventricular node
c. Atrioventricular bundle
d. Purkinje fibres
Sympathetic stimulation of the heart will
a. Increase heart rate
b. Reduce heart rate
c. Have no effect on heart rate
d. Reduce stroke volume
Parasympathetic stimulation of the heart is provided via the;
a. Phrenic nerves
b. Thoracic spinal nerves
c. Cervical spinal nerves
d. Vagus nerve
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