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Biology Lecture 5: Circulatory System

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Questions and Answers

What is the primary function of red blood cells?

To protect the body from foreign invaders

To deliver oxygen and some carbon dioxide (correct)

To remove waste products from the body

To aid in blood clotting

What is the term for blood cells clumping together, blocking circulation and oxygen supply?

Agglutination (correct)

Thrombosis

Hemostasis

Coagulation

What is the percentage of water in plasma?

60%

50%

80%

90% (correct)

Which blood type is considered a Universal Acceptor?

Type AB Signup and view all the answers

What is the function of white blood cells?

To protect the body from harmful bacteria and viruses Signup and view all the answers

What is the function of arterioles?

To form smaller blood vessels Signup and view all the answers

What determines an individual's blood type?

The presence or absence of different antigens Signup and view all the answers

What is the term for the number of times the heart beats per minute?

Heart rate Signup and view all the answers

What happens when an individual receives the wrong blood type during a transfusion?

The immune system produces antibodies to attach to antigens Signup and view all the answers

What is the term for the structure that triggers the heartbeat?

SA Node Signup and view all the answers

What is the function of platelets?

To aid in blood clotting Signup and view all the answers

What is the term for the pressure exerted by blood on the walls of blood vessels?

Blood pressure Signup and view all the answers

What is the average lifespan of a red blood cell?

120 days Signup and view all the answers

What is the percentage of red blood cells in the human body?

90% Signup and view all the answers

What is the term for the recovery period of the cardiac cycle?

T wave Signup and view all the answers

What is the term for the graphic representation of the cardiac cycle?

Electrocardiogram Signup and view all the answers