health science core chapter 9 study guide

Front

What is the primary pacemaker of the heart?

Back

The SA node (Sinoatrial node) is the primary pacemaker of the heart, responsible for initiating the heartbeat.

Front

What causes the 'lub' sound in the heart's lub-dub sound?

Back

The 'lub' sound is caused by the closing of the mitral and tricuspid valves.

Front

What condition is characterized by the hardening of coronary arteries?

Back

Atherosclerosis is the condition characterized by the hardening of coronary arteries.

Front

What is the name of the fluid-filled double-walled sac that surrounds the heart?

Back

The pericardium is the fluid-filled double-walled sac that surrounds the heart.

Front

What is the name of the artery located on the side of your neck?

Back

The carotid artery is located on the side of your neck.

Front

What is the function of the AV node in the heart?

Back

The AV node (Atrioventricular node) acts as a gatekeeper, slowing down the electrical signal before it passes to the ventricles.

Front

What are the two main types of circulation in the human body?

Back

The two main types of circulation are systemic circulation (blood flow to the body) and pulmonary circulation (blood flow to the lungs).

Front

What is the role of the aorta in the circulatory system?

Back

The aorta is the largest artery in the body, responsible for carrying oxygenated blood from the heart to the rest of the body.

Front

What is the significance of the coronary arteries?

Back

Coronary arteries supply blood to the heart muscle itself, providing it with the necessary oxygen and nutrients.

Front

What is the difference between arteries and veins?

Back

Arteries carry oxygenated blood away from the heart, while veins carry deoxygenated blood back to the heart.