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Edexcel A-Level Biology AS 1.8 Cardiac Cycle and Mammalian Heart Function Questions

Follow pressure and volume changes through each chamber, state which valves open or close and use graph or table values to support the sequence.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Identify chambers, valves and major vessels on mammalian heart diagrams.
  • Explain systole and diastole through pressure, volume and valve changes.
  • Interpret heart-rate, cycle-duration or aortic-flow data with values and units.

Edexcel A-Level Biology AS 1.8 Cardiac Cycle and Mammalian Heart Function Questions question 1

[Maximum number: 2]

Question (a)

(a)

The diagram shows the internal structure of a mammalian heart.

Figure for Question (a) — Edexcel A-Level Biology AS
[ 2 ]

Question (i)

(i)

Which blood vessel does the coronary artery branch from?

A

P

B

Q

C

R

D

S

[ 1 ]

Question (ii)

(ii)

When in the cardiac cycle is valve T open?

A

atrial systole and cardiac diastole

B

atrial systole only

C

cardiac diastole and ventricular systole

D

ventricular systole only

[ 1 ]
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