Anatomy - Chapter 20 practice quiz

1. Which of these structures returns blood to the right atrium?

• 1. coronary sinus

• 1. inferior vena cava

• 1. superior vena cava

• Both b and c are correct.

• 1. All of these are correct.

1. The valve located between the right atrium and the right ventricle is the

• 1. aortic semilunar valve.

• 1. pulmonary semilunar valve.

• 1. tricuspid valve.

• 1. bicuspid (mitral) valve.

1. The papillary muscles

• are attached to chordae tendineae.

• 1. are found in the atria.

• 1. contract to close the foramen ovale.

• 1. are attached to the semilunar valves.

• 1. surround the openings of the coronary arteries.

1. Given these blood vessels:

2. (1)aorta (3)pulmonary trunk (2)inferior vena cava( 4)pulmonary vein

Choose the arrangement that lists the vessels in the order a red blood cell would encounter them going from the systemic veins to the sys-temic arteries.

• 1,3,4,2

• 2,3,4,1

• 2,4,3,1

• 3,2,1,4

• 3,4,2,1

The bulk of the heart wall is

• epicardium.

• 1. pericardium.

• 1. myocardium.

• 1. endocardium.

• 1. exocardium.

1. Cardiac muscle has

• 1. sarcomeres.

• 1. a sarcoplasmic reticulum.

• 1. transverse tubules.

• 1. many mitochondria.

• 1. All of these are correct.

Tags

NGSS.HS-LS1-7

1. Action potentials pass from one cardiac muscle cell to another

• 1. through gap junctions.

• 1. by a special cardiac nervous system.

• 1. because of the large voltage of the action potentials.

• 1. because of the plateau phase of the action potentials.

• 1. by neurotransmitters.

Tags

NGSS.HS-PS2-5

1. During the transmission of action potentials through the conducting system of the heart, there is a temporary delay at the

• 1. bundle branches.

• 1. Purkinje fibers.

• 1. AV node.

• SA node.

• 1. AV bundle

1. Given these structures of the conducting system of the heart:

2. (1)atrioventricular bundle(4)Purkinje fibers(2)AV node(5)SA node(3)bundle branches

Choose the arrangement that lists the structures in the order an action potential passes through them.

• 1. 2,5,1,3,4

• 1. 2,5,3,1,4

• 1. 2,5,4,1,3

• 1. 5,2,1,3,4

• 5,2,4,3,1

1. Purkinje fibers

• 1. are specialized cardiac muscle cells.

• 1. conduct impulses much more slowly than ordinary cardiac muscle.

• 1. conduct action potentials through the atria.

• 1. connect the SA node and the AV node.

• ensure that ventricular contraction starts at the base of the heart