Exam 22: Heart

Which are differences between cardiac muscle tissue and skeletal muscle tissue? A: The sarcoplasmic reticulum in cardiac muscle is less extensive. B: The sarcoplasmic reticulum in cardiac muscle is more organized. C: Cardiac muscle has intercalated discs; skeletal muscle does not. D: Cardiac muscle has 1 or 2 nuclei per cell; skeletal muscle has multiple nuclei per cell. E: Cardiac muscle has more well defined terminal cisternae.

________________ innervation increases the rate and the force of heart contraction.

As blood is pumped into the arterial trunks past the semilunar valves,it

The trabeculae carneae in the left ventricle are ____________ in the right ventricle.

Which describes the endocardium? A: Has single layer of epithelium B: Has layer of areolar connective tissue C: Epithelial cells are squamous D: Epithelial cells are cuboidal E: Has layer of adipose connective tissue F: Has patches of myocardium

The layer of the heart wall composed of cardiac muscle tissue is the

Which carries oxygenated blood from the lungs to the heart?

Another name for the visceral layer of the serous pericardium is ________________.

Which pair is located more anteriorly in a heart in normal position?

The anterior part of each atrium is a flaplike extension called a(n)_______________.

Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?

Sympathetic innervation of the heart arises from the ________ segments of the spinal cord.

How many half-moon shaped,pocketlike cusps are found in each semilunar valve?

During ventricular systole

It is the contraction of the atria during atrial systole that completes the filling of the ventricles while the ventricles are in diastole.

The base of the heart is formed primarily by the

The pulmonary arteries carry _______________ blood to the lungs.

For ___________ of the cardiac cycle,all four chambers are in diastole together.

The function of the coronary sinus is to

Like the right atrium,the left atrium has pectinate muscles along its anterior wall.