Worksheets6.2 The Blood System
Total questions: 10
Worksheet time: 5mins
Which feature of capillaries distinguishes them from arteries and veins?
Narrow diameter
Valves to prevent backflow
Thick muscular walls
Elastic tissue
What is an advantage of capillary walls being one cell thick in the systemic circulation?
To allow carbon dioxide to diffuse into tissues
To allow oxygen to diffuse out of tissues
To allow glucose to diffuse into tissues
To allow urea to diffuse into tissues
Which diagram represents blood flow through the mammalian heart?
A
B
C
D
What is a feature of the left atrium?
A. Epinephrine decreases its rate of contraction.
B. It contracts as the left ventricle contracts.
C. It receives blood from the left pulmonary artery.
D. Its pressure decreases as the left ventricle fills up.
Which vessel carries deoxygenated blood away from the heart?
A. Aorta
B. Pulmonary artery
C. Vena cava
D. Pulmonary vein
What helps to keep blood flowing onwards away from the heart in an artery?
A. Valves
B. Elastic fibres
C. Contraction of skeletal muscles
D. Having a wide lumen
What causes heart ventricles to fill with blood?
I. Atrial contraction
II. Closing of atrioventricular valves
III. Opening of semilunar valves
A. I only
B. I and II only
C. II and III only
D. III only
What is a role of the coronary arteries?
A. To supply information about blood temperature to the hypothalamus
B. To supply the heart muscle with oxygen and nutrients
C. To carry blood away from the heart
D. To monitor blood pH
When the left ventricle is relaxed, what is the state of the valves?
A
B
C
D
What observation did William Harvey use as evidence for the circulation of blood?
A. The ventricles of the heart pump blood out into arteries.
B. Valves ensure unidirectional flow of blood.
C. Capillaries carry blood from arteries to veins.
D. All organs of the body have a separate blood supply.
