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HIGHER HUMAN BIOLOGY > Structure and Function of the Heart Unit 2 > Flashcards

Structure and Function of the Heart Unit 2 Flashcards

1
Q

Name the 4 chambers of the heart

A
  • Right Atrium
  • Left Atrium
  • Right Ventricle
  • Left Ventricle
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2
Q

Which type of blood vessel carries blood towards the heart ?

A

Veins

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3
Q

Which type of blood vessel carries blood away from the heart ?

A

Arteries

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4
Q

Name the blood vessel that carries deoxygenated blood from the body back to the heart and enters the right atrium ?

A

Vena Cava

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5
Q

Name the chamber that blood travels to from the right atrium ?

A

Right ventricle

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6
Q

Name the valve through which blood travels as it goes from the right atrium to the right ventricle ?

A

AV Valve (Atrio-Ventricular Valve)

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7
Q

What does the AV valve on the right side of the heart prevent ?

A

Backflow of blood from the right ventricle to the right atrium

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8
Q

Blood travels to the lungs from the right ventricle through which blood vessel ?

A

Pulmonary Artery

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9
Q

As blood travels from the right ventricle to the pulmonary artery, name the valve that it passes through

A

Semi-lunar valve

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10
Q

What does the semi-lunar valve on the right side of the heart prevent ?

A

Backflow of blood from the pulmonary artery to the right ventricle

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11
Q

What does blood travelling to the lungs from the pulmonary artery pick up at the lungs ?

A

Oxygen

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12
Q

What name is given to blood rich in oxygen ?

A

Oxygenated blood

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13
Q

What name is given to blood low in oxygen ?

A

Deoxygenated blood

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14
Q

Name the blood vessel that returns blood to the left atrium of the heart from the lungs

A

Pulmonary vein

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15
Q

Is the blood returning the left atrium oxygenated or deoxygenated ?

A

Oxygenated

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16
Q

What chamber does blood from the left atrium go to ?

A

Left ventricle

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17
Q

Name the valve present between the left atrium and left ventricle

A

AV Valve

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18
Q

What does the AV valve on the left side of the heart prevent ?

A

Backflow of blood from the left ventricle to the left atrium

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19
Q

Which ventricle wall is thicker and why ?

A

Left ventricle wall because it has to withstand the pressure of blood travelling to all round the body from here, whereas blood leaving from the right ventricle is only travelling a relatively short distance to the lungs, so is not under as much pressure

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20
Q

Blood travels from the left ventricle out of the heart through which blood vessel ?

A

Aorta

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21
Q

Name the valve present between the aorta and the left ventricle

A

Semi-lunar valve

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22
Q

What does the semi lunar valve on the left side of the heart prevent ?

A

Backflow of blood from the aorta to the left ventricle

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23
Q

Name two veins associated with the heart

A

Vena cava and pulmonary vein

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24
Q

Name the two arteries associated with the heart

A

Pulmonary artery and aorta

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25
What is unique about the pulmonary artery and pulmonary vein
They are the only artery and vein in the body that switches the rule regarding arteries farting oxygenated blood and the veins carrying deoxygenated blood. PA carries deoxygenated blood and PV carries oxygenated blood
26
What is the other term for heart rate ?
Pulse
27
What units are used to measure heart rate/pulse ?
Beats per minute
28
What term describes the volume of boood expelled by each verb trifle on contraction ?
Stroke volume
29
What figure is given if the heart rate is multiplied by the stroke volume ?
Cardiac output
30
What name is given to the pattern of systole and diastole shown by the heart in one heartbeat ?
Cardiac cycle
31
What name is given to the contraction of the heart ?
Systole
32
What name is given to the relaxation of the heart ?
Diastole
33
What are the three stages to the cardiac cycle ?
- Atrial systole - Ventricular systole - Atrial and Ventricular Diastole
34
Describe the state of the atria, ventricles and the valves during atrial systole
Atria contracting, ventricles relaxing, AC valves or opened, SL valves shut
35
Describe the state of the atria, ventricles and the valves. during ventricular systole
Ventricles contracting, atria relaxing, AV valves shut, SL valves opened
36
Describe the state of the aria, ventricles and the valves during diastole
Atria and ventricles both relaxed, SL valves closed and AV valves just about to open
37
What does the P wave represent on an electrocardiogram ?
The atria contracting
38
What does the QRS wave represent on an electrocardiogram ?
The ventricles contracting
39
What does the T wave represent on an electrocardiogram ?
The atria and ventricles relaxing
40
What initiates the heartbeat ?
The SAN/Pacemaker
41
Where in the heart is the pacemaker/SAN located ?
The wall of the right atrium
42
When the pacemaker releases an electrical impulse, what is first to contract ?
The atria (atrial systole)
43
When the atria contract following electrical excitation, which node then picks this up ?
AV node
44
Where is the AV node located ?
The base of the atria
45
When the electrical impulses during conduction of the heart reach the AV node, where is the electrical impulses passed to ?
Along two conducting fibres to the apex of the heart
46
When the electrical impulses during conduction of the heart pass along the conducting fibres to the apex of the heart, what happens to the ventricles ?
They contract (ventricular systole)
47
What name is given to the two nerves of the autonomic nervous system ?
Parasympathetic and sympathetic nerves
48
What word is used to describe the fact that as one nerve of the autonomic nervous system has one effect on the body the other nerve has the opposite effect ?
Antagonistic
49
Which nerve of the autonomic nervous system causes the heart rate to increase ?
Sympathetic nerve
50
Which nerve of the autonomic nervous system causes the heart rate to decrease ?
Parasympathetic nerve
51
Name the hormone that can increase the rate of the pacemaker
Adrenaline
52
Name the neurotransmitter released by the sympathetic nerve
Noradrenaline
53
Name the neurotransmitter released by the parasympathetic nerve
Acetylcholine
54
What is the blood pressure a measure of ?
The pressure exerted by the blood against the walls of the blood vessels when the heart is undergoing systole and again during diastole
55
What is a typical blood pressure reading ?
120mmHg/80mmHg
56
What is the instrument used to measure blood pressure ?
Sphygmomanometer
57
In step one of using the sphygmomanometer, the cuff is inflated until the blood stops flowing in an artery. This will be detected when no pulse can be heart with a stethoscope. The cuff will then gradually be deflated to a blood flow again. How will this be detected ?
The stethoscope will hear a slow pulse
58
What reading is first taken with a stethoscope when the pulse is heard for the first time during a blood pressure reading ?
Systolic pressure
59
What reading is taken with a stethoscope when the pulse disappears after the systolic pressure is taken ?
Diastolic pressure
60
What figures would indicate high blood pressure ?
140mmHg/90mmHg and anything over
61
What is the other name for high blood pressure ?
Hypertension
62
What problems can hypertension cause in later life ?
Strokes and heart disease
63
What factors can contribute to high blood pressure ?
- Being overweight - Not doing enough exercise - Consuming too much salt - Drinking excessively on a regular basis - Eating a diet rich in fat especially animal fat - Stress

HIGHER HUMAN BIOLOGY (21 decks)

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