Chapter 19, Lesson 6: Regulation of Cardiac Output

Flashcards from Chapter 19, Lesson 6 of McGraw Hill Anatomy and Physiology, Tenth Edition, by Kenneth S. Saladin.

Cardiac centers

Centers in the medulla oblongata that control rhythm and contraction; comprised of the cardioacceleratory center and cardioinhibitory center

Cardioaccelatory center

Communicates via cardiac nerves for sympathetic (fight or flight) reactions

Cardioinhibitory center

Communicates via vagus nerves for parasympathetic (rest and digest) reactions

Cardiac output

The amount of blood ejected by each ventricle in one minute; calculated by multiplying heart rate and stroke volume (4 to 6 L per minute)

Cardiac reserve

The difference between a person’s resting and maximum cardiac output

Pulse

The pressure surge used to measure heart rate by palpating arteries close to surface

Radial artery

Artery near the wrist used for checking pulse

Common carotid artery

Artery in the neck used for cheking pulse

Tachycardia

A persistent, resting heart rate over 100 bpm via stress, anxiety, stimulants, fever, or loss

Bradycardia

A persistent, resting heart rate under 60 bpm common in endurance athletes but also caused by hypothermia

Coronary artery disease

Degenerative disease in arteries that can result from atherosclerosis

Atherosclerosis

An accumulation of lipid deposits and necrotic tissue that could cause heart attacks; can be caused by genetics but also caused by diet