Heart

Question 1

2 substances transported by blood and place where each substance enters the blood

Answer 1

Hormones-endocrine gland

Antibodies-b lymphocytes

Question 2

Precise location and role of SV node

Answer 2

Location:right atrium
Role:generates electrical impulses

Question 3

Precise location and role of AV node

Answer 3

Location:septum between right atrium and right ventricle
Role:causes ventricular contractions

Question 4

Blood measure

Answer 4

Force of blood against the wall of the artery

Question 5

Transports blood out of the heart

Answer 5

Coronary vein

Question 6

Brings blood away from kidneys

Answer 6

Renal vein

Question 7

Carries very little co2

Answer 7

Pulmonary vein

Question 8

Brings blood to right atrium

Answer 8

Vena cava

Question 9

Has capillaries at both end

Answer 9

Hepatic portal vein

Question 10

How blood is moved through veins

Answer 10

Muscles contract to move the blood

Valves prevent back flow

Question 11

Pulse

Answer 11

Alternate expansion and contraction of arteries

Question 12

Why is the wrist suitable for checking pulse

Answer 12

Artery is close to the surface

Question 13

Why are co2 levels usually higher in venous blood rather than arterial blood

Answer 13

Venous blood has collected co2 from respiration

Question 14

Why are co2 levels low in pulmonary vein

Answer 14

Blood has been cleared of co2 in the lungs

Question 15

Role of co2 in human breathing rate

Answer 15

Medulla oblongata registers co2 levels in the blood
More co2=faster breathing
Less co2=slower breathing

Question 16

One way in which lymph differs from blood

Answer 16

Contains no red blood cells

Question 17

2 functions of lymphatic system

Answer 17

1. fighting infection

2. transport digested lipids around the body

Question 18

2 ways in which red blood cells differ from white blood cells

Answer 18

1. red blood cells do not have a nucleus

2. red blood cells contain hameglobin

Question 19

Name another group of white blood cells

Answer 19

Monocytes

Question 20

Role of antibodies

Answer 20

To activate antigens

Question 21

Types of T cells

Answer 21

Helper T cells-stimulate B cells
Killer T cells-attack infected cells
Memory T cells-remember antigens

Question 22

Cavity in the body in which the lungs and heart are located

Answer 22

Thoraic

Question 23

One way in which the heart differs from different muscles

Answer 23

Doesn’t tire

Question 24

2 circuits in circulatory system

Answer 24

Pulmonary circuit

Systemic circuit

Question 25

Effect of diet on circulatory system

Answer 25

High salt diet increases blood pressure

Question 26

Effect of exercise on circulatory system

Answer 26

Stimulates the production of new blood vessels

Question 27

Dissection of the heart

Answer 27

1. Identified the front by ensuring left side was thicker than the right
2. Used a scalpel to make a shallow cut in the left ventricle and left atrium
3. Located the bicuspid valve between the left atrium and left ventricle
4. Made a shallow cut on the right side
5. Located the tricuspid valve between the right atrium and right ventricle