Anatomy Heart Multiple Choice
Questions & Answers(GRADED A+)
Choose the correct sequence of current flow through the heart wall.
- AV node, SA node, Purkinje fibers, AV bundle of His, right and left bundle branches
- SA node, AV node, AV bundle of His, right and left bundle branches, Purkinje fibers
- SA node, Purkinje fibers, AV node, AV bundle of His, right and left bundle branches
- AV node, Purkinje fibers, AV node, AV bundle of His, right and left bundle branches
- Purkinje fibers, AV node, AV bundle of His, right and left bundle branches, SA node - ANSWER- SA
node, AV node, AV bundle of His, right and left bundle branches, Purkinje fibers
During pulmonary circulation blood leaves the
- right ventricle and goes directly to the aorta.
- right ventricle and moves to the lungs.
- right atrium and goes directly to the left ventricle.
- right atrium and goes directly to the lungs.
- left ventricle and moves to the lungs. - ANSWER- right ventricle and moves to the lungs.
During systemic circulation, blood leaves the
- left ventricle and goes directly to the aorta.
- right ventricle and goes directly to the aorta.
- right ventricle and moves to the lungs.
- lungs and moves to the left atrium.
, - right atrium and goes directly to the lungs. - ANSWER- left ventricle and goes directly to the aorta.
Identify the correct sequence of blood flow through the chambers of the heart.
- Lungs, right ventricle, left ventricle, right atrium, left atrium
- Right ventricle, left ventricle, left atrium, lungs, right atrium
- Left atrium, left ventricle, right ventricle, right atrium, and lungs
- Right atrium, right ventricle, lungs, left atrium, left ventricle
- Left ventricle, left atrium, lungs, right ventricle, right atrium - ANSWER- Right atrium, right ventricle,
lungs, left atrium, left ventricle
The absolute refractory period refers to the time during which
- the muscle cell is ready to respond to a threshold stimulus.
- a skeletal muscle cannot respond to any stimulus and lasts about 250 ms.
- a cardiac muscle cannot respond to any stimulus and lasts only 1 to 2 milliseconds.
- the muscle cell is ready to respond to any stimulus.
- the muscle cell is NOT in a position to respond to a stimulus of any strength. - ANSWER- the muscle
cell is NOT in a position to respond to a stimulus of any strength.
The cardiac cycle includes all of the following events EXCEPT
- the movement of impulse from the SA node to all regions of the heart wall.
- the closing and opening of the heart valves during each heart beat.
- the number of times the heart beats in one minute.
- the changes in pressure gradients in all chambers of the heart.
- the changes in blood volume in all chambers of the heart. - ANSWER- the number of times the
heart beats in one minute.
The coronary arteries arise from the
- aorta.
