NEW
Font size
WorksheetsExPhys Ch 7: Cardiovascular System & Its Control
Total questions: 15
Worksheet time: 8mins
Which muscle cells release Ca2+ from the sarcoplasmic reticulum?
Myocardial cells
Skeletal muscle cells
Smooth muscle cells
Cardiac muscle cells
What is the role of the ATPase pump in muscle cells?
To release calcium ions
To transport calcium ions back into the sarcoplasmic reticulum
To synthesize ATP
To open calcium channels
What is the main function of cardiac muscles?
Pump blood
Produce movement
Digest food
Filter waste
What is the function of the left ventricle?
To pump blood into the lungs
To receive deoxygenated blood from the body
To pump oxygenated blood to the body
To receive oxygenated blood from the lungs
Which part of the heart is responsible for receiving oxygenated blood from the lungs?
Right atrium
Left atrium
Right ventricle
Left ventricle
What is the primary function of the sinoatrial (SA) node?
To pump blood
To initiate electrical signals
To regulate blood pressure
To control heart valves
What is the role of the atrioventricular (AV) node in the cardiac conduction system?
To initiate the heartbeat
To delay the electrical signal
To pump blood
To regulate blood pressure
Where are the pacemaker cells of the SA node located?
In the left ventricle
In the upper posterior wall of the right atrium
In the center of the heart
In the left atrium
Why does the AV node delay the contraction signal?
To allow the ventricles to contract first
To allow the right atrium and left atrium to contract before the right ventricle and left ventricle
To stop the heart from beating
To allow the left ventricle to contract first
What happens after the AV node delays the signal?
The signal is stopped
The signal is relayed to the AV bundle
The signal is sent back to the SA node
The signal is sent to the left atrium
Where does the AV bundle send the signal?
Toward the apex of the heart
To the atria
To the pulmonary veins
To the aortic arch
What do Purkinje fibers form?
Terminal branches of right and left bundle branches
Initial branches of the aorta
Main branches of the pulmonary artery
Primary branches of the atria
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
Right atrium
Left ventricle
Right ventricle
What effect does the parasympathetic nervous system have on heart rate (HR)?
Increases HR
Decreases HR
No effect on HR
Doubles HR
What happens to the cells when acetylcholine is released by the parasympathetic nervous system?
Depolarizes cells
Hyperpolarizes cells
Neutralizes cells
Energizes cells
