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The first heart sound is due to the: closing of the atrioventricular valves O closing of the semilunar (V-a) valves opening of the atrioventricular valves opening of the semilunar (V-a) valves QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal Osmooth, cardiac, and skeletal O smooth and skeletal O only cardiac

The first heart sound is due to the: closing of the atrioventricular valves O closing of the semilunar (V-a) valves opening of the atrioventricular valves opening of the semilunar (V-a) valves QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal Osmooth, cardiac, and skeletal O smooth and skeletal O only cardiac

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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QUESTION 7 The first heart sound is due to the: O closing of the atrioventricular valves closing of the semilunar (V-a) valves O opening of the atrioventricular valves O opening of the semilunar (V-a) valves O QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal O smooth, cardiac, and skeletal O smooth and skeletal O only cardiac
Transcribed Image Text:QUESTION 7 The first heart sound is due to the: O closing of the atrioventricular valves closing of the semilunar (V-a) valves O opening of the atrioventricular valves O opening of the semilunar (V-a) valves O QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal O smooth, cardiac, and skeletal O smooth and skeletal O only cardiac
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Step 1: Introduce heart

Heart,  is the main organ of circulatory system in vertebrates, It is located on the ventral side of the oesophagus. Human heart is more complex and advanced as compared to other. 

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