Heart Flashcards

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1
Q

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

A

Hormones-endocrine gland

Antibodies-b lymphocytes

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2
Q

Precise location and role of SV node

A

Location:right atrium
Role:generates electrical impulses

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3
Q

Precise location and role of AV node

A

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

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4
Q

Blood measure

A

Force of blood against the wall of the artery

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5
Q

Transports blood out of the heart

A

Coronary vein

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6
Q

Brings blood away from kidneys

A

Renal vein

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7
Q

Carries very little co2

A

Pulmonary vein

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8
Q

Brings blood to right atrium

A

Vena cava

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9
Q

Has capillaries at both end

A

Hepatic portal vein

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10
Q

How blood is moved through veins

A

Muscles contract to move the blood

Valves prevent back flow

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11
Q

Pulse

A

Alternate expansion and contraction of arteries

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12
Q

Why is the wrist suitable for checking pulse

A

Artery is close to the surface

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13
Q

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

A

Venous blood has collected co2 from respiration

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14
Q

Why are co2 levels low in pulmonary vein

A

Blood has been cleared of co2 in the lungs

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15
Q

Role of co2 in human breathing rate

A

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

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16
Q

One way in which lymph differs from blood

A

Contains no red blood cells

17
Q

2 functions of lymphatic system

A
  1. fighting infection

2. transport digested lipids around the body

18
Q

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

A
  1. red blood cells do not have a nucleus

2. red blood cells contain hameglobin

19
Q

Name another group of white blood cells

A

Monocytes

20
Q

Role of antibodies

A

To activate antigens

21
Q

Types of T cells

A

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

22
Q

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

A

Thoraic

23
Q

One way in which the heart differs from different muscles

A

Doesn’t tire

24
Q

2 circuits in circulatory system

A

Pulmonary circuit

Systemic circuit

25
Q

Effect of diet on circulatory system

A

High salt diet increases blood pressure

26
Q

Effect of exercise on circulatory system

A

Stimulates the production of new blood vessels

27
Q

Dissection of the heart

A
  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