Cardiovascular Physiology 1

Question 1

No change in blood to ______ at rest or exercise

Answer 1

the brain

Question 2

Pericardium

Answer 2

• anchors heart
• inelastic sheath / covers heart
• helps with contraction

Question 3

Pericardial fluid

Answer 3

For lubrication

Question 4

Coronary arteries on surface because….

Answer 4

prevents compression during contraction

Question 5

Fibre orientation

Answer 5

• helps with wringing motion

- downward spiral

Question 6

Ventricular torsion

Answer 6

• more efficient blood ejection

- better suction in heart (diastolic suction)

Question 7

cardiac muscle

Answer 7

involuntary striated muscle

short and connected through intercalated discs

Question 8

Intercalated discs

Answer 8

• connects cardiac muscle
• DESMOSOMES: withstand stress; hold everything together
• GAP JUNCTIONS: movement of ions + electrical impulses