SHARP ECG STUDY GUIDE REAL EXAM ACCURATE QUESTIONS WITH 100% RATED CORRECT ANSWERS EXPERT VERIFIED GET IT A+ 2025 LATEST UPDATED

SHARP ECG STUDY GUIDE REAL EXAM ACCURATE QUESTIONS
WITH 100% RATED CORRECT ANSWERS EXPERT VERIFIED GET
IT A+ 2025 LATEST UPDATED



Layers of the heart - ...(CORRECT ANSWER). pericardium

myocardium

endocardium



pericardium - ...(CORRECT ANSWER) outermost layer: fibrous and serous



fibrous

-outer sack that anchors the heart



serous

-inner, fluid secreting membrane with two layers

-parietal (lines inner surface of fibrous sac)

-visceral (AKA epicardium) lines myocardium

-between the two is the pericardial space, with 10-30ml of fluid to give the heart
space to relax and contract



myocardium - ...(CORRECT ANSWER). i. Thick, middle muscular layer that
makes up the
bulk of the heart wall

,ii. Composed of cardiac muscle cells and is responsible for the heart's ability to
contract



endocardium - ...(CORRECT ANSWER). i. Thin layer of tissue that lines the
inner surface of
heart muscle and heart chambers



ii. Extensions and folds of this tissue forms the valves of the heart.



4 primary characteristics of the heart - ...(CORRECT ANSWER). automaticity

excitability

conductivity

contractility



automaticity - ...(CORRECT ANSWER). i. Specific to the pacemaker cells;
ability to
generate their own electrical impulse spontaneously



excitability - ...(CORRECT ANSWER) Ability of ALL cardiac cells to respond
to an electrical
impulse



conductivity - ...(CORRECT ANSWER) i. Ability of ALL cardiac cells to
conduct an electrical
impulse



contractility - ...(CORRECT ANSWER) i. Specific to muscle cells; ability to

, cause cardiac
muscle contraction