Unit 5: The Circulatory & Respiratory Sytems

Question 1

Responsible for the powerful contractions that pump blood through the circulatory system

Answer 1

Myocardium

Question 2

Prevent blood from flowing “backwards”

Answer 2

Valves

Question 3

The pacemaker for the heart

Answer 3

Red blood cells

Question 4

Carry blood from the heart to the tissues of the body

Answer 4

Arteries

Question 5

The smallest of the blood vessels

Answer 5

Capillaries

Question 6

Return blood to the heart

Answer 6

Veins

Question 7

A healthy blood pressure for an average adult

Answer 7

120/80

Question 8

Make up 55% of the total volume of the blood

Answer 8

Plasma

Question 9

Main function is to transport oxygen

Answer 9

Red blood cells

Question 10

Guard against infection, flight parasites, and attack bacteria

Answer 10

White blood cells

Question 11

Responsible for blood clotting

Answer 11

Platelets

Question 12

The approximately 3 liters of fluid that leaves the blood each day

Answer 12

Lymph

Question 13

Occurs when plagues build up in the artery walls, causing them to stiffen

Answer 13

Atherosclerosis

Question 14

What is the central cause for a stroke?

Answer 14

Sudden death of brain cells when their blood supply is interrupted

Question 15

Describe the differences between HDL and LDL (cholesterol)

Answer 15

HDL transports excess cholesterol fumd tissues while LDL is the cholesterol carrier

Question 16

Describe the role of the diaphragm as it relates to breathing

Answer 16

When you inhale, it contracts and flattens