18.7 Heart Pumping

Question 1

Volume of blood pumped by each ventricle in 1 minute
[Heart rate x Stroke volume]

Answer 1

Cardiac output (CO)

Question 2

Number of beats per minute

Answer 2

Heart rate

Question 3

Volume of blood pumped out by one ventricle with each beat (each contraction)
Normal at rest = 5.25L/min

Answer 3

Stroke volume

Question 4

Exercise
Increased ventricular filling time
Autonomic CNS output
Increased EDV
Decreased ESV
Increased heart rate

Answer 4

Triggers for CO increase

Question 5

Sympathetic nervous system can be activated by emotional or physical stressors
Parasympathetic nervous system opposes sympathetic

Answer 5

Autonomic nervous system

Question 6

Low blood calcium
Depresses heart

Answer 6

Hypocalcemia

Question 7

High blood calcium
Increases HR and contractility

Answer 7

Hypercalcemia

Question 8

True or false. Fetus have the fastest heart rate and declines with age

Answer 8

True

Question 9

True or false. Males have a faster heart ran than females

Answer 9

False

Question 10

Female: 72-92 bpm
Male: 64-72 bpm

Answer 10

Average heart rates

Question 11

Abnormally fast heart rate at rest; >100 bpm
Can lead to fibrillation

Answer 11

Tachycardia

Question 12

Heart rate slower than 60 bpm at rest
May result in grossly inadequate blood circulation
Desirable for endurance training (athletes)

Answer 12

Bradycardia

Question 13

Leads to blood circulation that doesn’t meet tissues needs

Answer 13

Congestive heart failure (CHF)

Question 14

Clogged arteries caused by fat buildup

Answer 14

Coronary atherosclerosis

Question 15

Ventricles dilate and become flabby, and myocardium deteriorates

Answer 15

Dilated cardiomyopathy (DCM)