Cardiac Cycle & Conduction System
The Circuits (Pulmonary & Systemic)
Types of Blood Vessels
Valves and Blood Flow Pathway
Heart Anatomy & Chambers
100
The body's primary pacemaker, which spontaneously generates the electrical impulses that set the rhythm of the heart, is the:
SA Node (Sinoatrial Node)
100
Normal blood pressure is:
120/80
100
Which vessels are characterized by walls that are only one cell layer thick, facilitating the exchange of oxygen, nutrients, and waste with surrounding tissues?
Capillaries
100
Which heart valve is situated between the left atrium and the left ventricle, preventing backflow of blood when the ventricle contracts?
Mitral Valve or Bicuspid Valve
100
The heart slightly rests on the right lung
False
200
This measures the electrical activity of the heart:
EKG
200
Which term refers to the contraction phase of the cardiac cycle, when the ventricles forcefully expel blood into the systemic and pulmonary circuits
Systole
200
These vessels that are thicker in structure to withstand blood pressure:
Arteries
200
Deoxygenated blood leaving the right ventricle travels next through which major vessel?
Pulmonary Arteries
200
The middle, thick, muscular layer of the heart wall that is primarily responsible for the heart's pumping action is called the:
Myocardium
300
Contraction of the ventricles is referred to as:
Systole
300
The circuit that involves transportation of blood to the lungs and the heart:
Pulmonary circuit
300
Vessels that carry blood away from the heart:
Arteries
300
This valve is considered a semilunar valve:
Pulmonary valve
300
The pericardium is a double serous membrane that covers the heart
True
400
The condition where the resting heart rate is above 100 bpm:
Tachycardia
400
Pulmonary arteries are oxygen rich or poor:
Oxygen poor
400
Structure where gas exchange occurs:
Capillaries
400
The two structures where blood enters the heart:
Vena cava to the right atrium
400
The outer most layer of the heart is:
Epicardium
500
What does the T wave represent?
Relaxation of ventricles
500
In cold temperatures, the vessels have a vasodilation effect to keep heat away from the chest.
False
500
The buildup of plaque is arteries is known as:
atherosclerosis
500
Structures that hold the valves in place:
Chordae Tendineae
500
This structure separates the oxygen rich blood from oxygen poor blood in the heart:
Septum