HW 8: chapter 18.1 to chapter 18.4

Which of the following is NOT a role of the fibrous pericardium? A. It protects the heart. B. It facilitates heart contraction. C. It anchors the heart to surrounding structures. D. It prevents the heart from overfilling with blood

B. It facilitates heart contraction.

The condition where a buildup of fluid in the pericardial cavity compresses the heart and limits its ability to contract is called ________. A. pericarditis B. cardiac tamponade C. myocardial infarction D. angina pectoris

B. cardiac tamponade

"All cardiac veins empty into the ______, which then empties into the ______." A. coronary sinus; left atrium B. coronary sinus; right atrium C. great cardiac vein; right atrium D. great cardiac vein; left atrium

B. coronary sinus; right atrium

"The groove around the heart between the atria and ventricles, which contains blood vessels and adipose tissue, is called the ______." A. anterior intre-ventricular sulcus B. coronary sulcus C. interatrial septum D. coronary sinus

B. coronary sulcus

An obstruction in the pulmonary trunk would prevent blood from A. being distributed to the systemic circulation B. going to the lungs to pick up oxygen C. getting into the right atrium D. leaving the left ventricle

B. going to the lungs to pick up oxygen

Compared to skeletal muscle cells cardiac muscle cells _______. A. are longer B. haven proportionately more mitochondria C. have more T-tubules D. are more reliant on anaerobic respiration E. all of the above are true

B. haven proportionately more mitochondria

Blood from the pulmonary veins enters which heart chamber? A. right atrium B. left atrium C. right ventricle D. left ventricle

B. left atrium

"Freshly oxygenated blood enters the heart through the ______________, and is pumped out the _____________." A. right atrium; aorta B. left atrium; aorta C. right ventricle; pulmonary arteries D. left ventricle; pulmonary arteries

B. left atrium; aorta

"A needle being inserted into the heart would travel through the layers of the heart wall and coverings in which order, beginning on the outside?" A. "fibrous pericardium, parietal pericardium, visceral pericardium, myocardium, endocardium" B. "epicardium, parietal pericardium, fibrous pericardium, myocardium, endocardium" C. "endocardium, myocardium, fibrous pericardium, parietal pericardium, visceral pericardium" D. "visceral pericardium, parietal pericardium, fibrous pericardium, endocardium, myocardium"

A. "fibrous pericardium, parietal pericardium, visceral pericardium, myocardium, endocardium"

ntercalated discs include these structures: A. gap junctions and desmosomes B. gap junctions and t-tubules C. "gap junctions, z-disks, and sarcoplasmic reticulum" D. sarcoplasmic reticulum and voltage-gated channels

A. gap junctions and desmosomes

The function of the chordae tendineae is to _____. A. prevent the atrioventricular valves from being pushed upward into the atria when the ventricles contract B. pull the atrioventricular valves shut before the ventricles begin to contract C. pull the atrioventricular valves open so that the ventricles can begin to fill

A. prevent the atrioventricular valves from being pushed upward into the atria when the ventricles contract

The irregular beams of muscle covering the inner walls of the ventricles are called ______. A. trabecular carneae B. interventricular sulci C. pectinate muscles D. fossa ovalis

A. trabecular carneae

A blood clot in the circumflex artery would cause a myocardial infarction in part of the _____. A. walls of the left atrium and posterior left ventricle B. anterior walls of the left and right ventricles, and the inter-ventricular septum C. posterior walls of the left and right ventricles D. lateral walls of the right atrium and right ventricle

A. walls of the left atrium and posterior left ventricle

The fact that the right ventricle of the heart is thinner than the left ventricle reveals that it ________. A. pumps a smaller volume of blood B. pumps blood against less resistance C. pumps blood into narrower vessels D. sends blood through a smaller valve

B. pumps blood against less resistance

Which statement about coronary blood supply is true? A. The coronary arteries are small arteries branching off of the interventricular arteries. B. The arrangement of the coronary arteries is identicle for all individuals. Even small deviations from this pattern are incompatible with life. C. The anterior inter ventricular artery supplies the anterior walls of both ventricles.

C. The anterior inter ventricular artery supplies the anterior walls of both ventricles.

Which statement about the heart is true? A. The heart weighs slightly more than a pound and is the size of the hand. B. The top of the heart is at the level of the 5th intercostal space and the base of the heart is attached to the diaphragm. C. The apex of the heart points toward the left hip and is located between the 5th and 6th ribs. D. The apex of the heart is where the aorta comes out and the base is the point at the bottom of the ventricles

C. The apex of the heart points toward the left hip and is located between the 5th and 6th ribs.

The endocardium is composed of __________. A. collagen fibers and the lumen B. myocardiocytes and the fibrous cardiac skeleton C. a sheet of flat epithelial cells resting on a thin layer of connective tissue D. ropelike rings around the heart valves that help anchor them in place

C. a sheet of flat epithelial cells resting on a thin layer of connective tissue

Blood leaving the left ventricle goes through which of the following valves? A. bicuspid B. tricuspid C. aortic semilunar D. pulmonary semilunar

C. aortic semilunar

What part of the heart is considered the systemic circuit pump? A. left atrium B. right ventricle C. left ventricle D. right atrium

C. left ventricle

The right side of the heart receives ______blood and pumps it to ______. A. "oxygen poor, tissues throughout the body" B. "oxygen rich, tissues throughout the body" C. "oxygen rich, the left side of the heart" D. "oxygen poor, the lungs"

D. "oxygen poor, the lungs"

Select the correct statement about the heart valves. A. The pulmonary semilunar valve separates the right atrium from the right ventricle. B. The tricuspid valve divides the left atrium from the left ventricle. C. Aortic and pulmonary valves control the flow of blood into the atria. D. The semilunar valves are pushed open by rising pressure in the ventricle.

D. The semilunar valves are pushed open by rising pressure in the ventricle.

Auricles slightly increase blood volume in the ventricles. True or False

False

The right side of the heart pumps blood against the same pressure as the left side of the heart. True or False

False

The left side of the heart pumps the same volume of blood as the right. True or False

True