Circulatory System Quiz

What is the normal range for a resting heart rate in adults?

• 40–60 bpm

• 60–100 bpm

• 100–140 bpm

• 120–160 bpm

What do you multiply your 15-second pulse count by to get beats per minute?

• 2

• 3

• 4

• 5

What kind of measurement is taken while sitting?

• Active

• Semi-active

• Initial

• Secondary

Why does pulse rate increase after standing?

• The heart stops briefly

• Gravity pulls blood downward

• Oxygen leaves the blood

• Muscles relax

Which system maintains homeostasis through transport and circulation?

• Respiratory

• Digestive

• Circulatory

• Excretory

Which of the following is not a function of the circulatory system?

• Gas exchange

• Hormone transport

• Digestion

• Waste removal

The circulatory system is described as a:

• One-way system

• Closed loop

• Static system

• Reversible system

In a closed circulatory system, blood is:

• Free-floating

• Confined in vessels

• Mixed with air

• Pumped once

What circulates in an open circulatory system?

• Plasma

• Hemolymph

• Cytoplasm

• Interstitial fluid only

What structure initiates the heartbeat?

• Aortic valve

• Right ventricle

• Sinoatrial node

• Pulmonary vein