Introduction

Question 1

Functions of the CVS (5)

Answer 1

1. Bulk flow of materials: gases, nutrients, hormones, waste
2. temperature regulation
3. homeostasis
4. host defence
5. reproduction

Question 2

Conductance vs. capacity vessels

Answer 2

Conductance: arterial system: carries blood around body
Capacity: venous system, that store and return blood back to heart

Question 3

Pulse pressure =

Answer 3

systolic - diastolic

Question 4

Which nervous system has more CVS control?

Answer 4

sympathetic

Question 5

What is meant by the parallel arrangement of vessels?

Answer 5

allows independent regulation of blood flow to different organs
adapts to the metabolic demands of tissues

Question 6

what’s the key organ for controlling blood volume

Answer 6

kidneys

Question 7

Mean arterial blood pressure =

Answer 7

diastolic pressure + 1/3 pulse pressure (sys -dia)

Question 8

Heart has what % of blood if to take a snapshot?

Answer 8

7%

Question 9

What is meant by venous pump?

Answer 9

using muscles:
muscles contract which opens venous valve above it and pushes blood along
muscle relaxed -> valve above it stays shut

Question 10

How does standing up decrease your blood pressure?

Answer 10

around 500ml of blood from upper body goes to legs
decrease venous return
decrease cardiac output
decrease blood pressure

Question 11

Two things that decrease compliance

Answer 11

Age

Vasoconstriction