circulatory system

Question 1

First main function of blood

Answer 1

1. Transport - carries nutrients from digestive system and other organs
- carries gases to/from respiratory system and body
- carries waste to points of exit.

Question 2

Second main function

Answer 2

2. Temperature Regulation - balance of loss of body heat with making body heat

Question 3

When its cold?

Answer 3

A) vasoconstriction- narrowing of blood vessels to decrease blood flow to the vessels in the surface of the skin
- decrease in heat loss from blood causes heat to be conserved in the core of the body

Question 4

When its hot?

Answer 4

B) Vasodilation- widening of blood vessels to increase blood flow to the vessels in the surface of the skin.
- heat if blood is transferred from blood, across skin to surrounding air.

Question 5

Blood pressure

Answer 5

Force of blood pushing on the blood vessels walls

Question 6

Ventricles contract

Answer 6

A) systolic pressure- force of blood when ventricles contract and push blood out of heart

Question 7

Ventricles relax

Answer 7

B) Diastolic pressure - forces of blood when ventricles relax and fill with blood from the atria

Question 8

What is the name of the device used to measure blood pressure?

Answer 8

sphyg-momen-ometer

Question 9

what is the unit of measurement for blood pressure?

Answer 9

mmHg

Question 10

how is blood pressure communicated?

Answer 10

systolic (higher) / diastolic (lower)

Question 11

what is the average normal blood pressure?

Answer 11

120/80

Question 12

what factors can affect blood pressure?

Answer 12

meds: exercise/activity, stress, genetics, body temp, diet.

Question 13

what is prolonged high-blood pressure called?

Answer 13

hypertension

Question 14

what are the impacts of long term high BP

Answer 14

• causes heart to have to work harder for longer
• can damage arteries therefore increased risks of heart attacks, strokes, kidney faliure.