Skeletal and Cardiac Muscle

Clicker Questions

Name the connective tissue layer that surrounds a fascicle in skeletal muscle.

A. EndomysiumB. EpimysiumC. PerimysiumD. TendonE. Epicardium

Name the functional unit of skeletal muscle.

A. SarcolemmaB. Saroplasmic ReticulumC. SarcomereD. Myosin

The thick filament is also referred to as

A. ActinB. MyosinC. TropomyosinD. Troponin CE. G Actin

Which protein in G-Actin is responsible for blocking the bind site of myosin?

A. TropomyosinB. Troponin CC. Sarcoplasmic ReticulumD. Sarcolemma

The thin filament is also called

A. ActinB. MyosinC. TropomyosinD. Troponin C

During skeletal muscle contraction Calcium is stored in the

A. SarcolemmaB. SarcomereC. Sarcoplamic reticulumD. Golgi apparatusE. Nucleus

The systemic circulationA. Receives more blood than the pulmonary circulation

does

B. Receives blood from the left ventricle

C. Is a high pressure system compared to the pulmonary circulation

D. Both (b) and (c) above are correct

E. All of the above are correct

The chordae tendinae

A. Keep the AV valves from opening in the opposite direction during ventricular contraction

B. Hold the AV valves during diastole

C. Hold the right and left ventricles together

D. Transmit the electrical impulse form the atria to the ventricles

E. Contract when the ventricles contract

The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole

A. True

B. False

A mammalian heart has __________ chamber(s)

A. OneB. TwoC. ThreeD. Four

A heart murmur is characterized by

A. Rapid heart contractionB. Irregular heart contractionC. Mitral valve prolapseD. Semilunar valve dysfunction

The tricuspid valve is closed

A. While the ventricle is in diastoleB. By the movement of blood from

the atrium to ventricleC. By the movement of blood from

ventricle to aortaD. While the atrium is contractingE. When the ventricle is in systole

In a mammal, blood pressure is lowest in the

A. AortaB. Vena cavaeC. Capillaries of the armD. Veins of the leg

Which of the following represents the flow of blood from the heart to the body organs and back to the heart?

A. Venules to capillaries to veins to arteries

B. Arteries to capillaries to veinsC. Capillaries to arterioles to veinsD. Veins to arteries to capillaries to

arterioles

Which major vessel brings blood to the right atrium of the heart from the area of the body below the heart?

A. The Superior Vena Cava

B. The Inferior Vena Cava

C. The Pulmonary Trunk

D. The Aorta

The sac covering the outside of the heart is called theA. Perineurium

B. Perimysium

C. Pericardium

D. Perimytrium

The name valve that prevents back flow of blood from the left ventricle to the left atrium.A. Tricuspid

B. Bicuspid

C. Right Atrioventricular

D. Pulmonary Semilunar

Blood is pumped into the systemic circulation

by theA. Right atrium

B. Left atrium

C. Right Ventricle

D. Left Ventricle

Blood is pumped into the pulmonary circulation by theA. Right atrium

B. Left atrium

C. Right Ventricle

D. Left Ventricle