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Intro To Human Anatomy > Ch 19 > Flashcards

Ch 19 Flashcards

1
Q

What tissue comprises the heart valves

A

Endocardium with a connective tissue core

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2
Q

Where are atrioventricular valves found in the heart

A

Between Atria and ventricles

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3
Q

What is the right atrioventricular valve also known as

A

The tricuspid valve

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4
Q

What is the left atrioventricular valve also known as

A

The bicuspid or mitral valve

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5
Q

What tissue comprises the cardiac skeleton

A

Dense connective tissue

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6
Q

What are the four functions of the cardiac skeleton

A
  1. Anchors valve
  2. Prevent over dilation
  3. Main point of muscle insertion
  4. Blocks direct spread of electrical impulses
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7
Q

When do the AV valves open

A

When atrial pressure is greater than ventricular pressure

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8
Q

What is the function of the semilunar valves

A

Prevent blood flow back into the heart from the aorta and Pulmonary trunk

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9
Q

Systole refers to expansion or contraction

A

Contraction

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10
Q

Diastole refers to expansion or contraction of the heart

A

Expansion or relaxation

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11
Q

Are Atria walls thin or thick

A

Thin

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12
Q

Are ventricle walls thin or thick

A

Thick

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13
Q

How much bigger is the left ventricle than the right ventricle

A

3 times thicker because it exerts more pumping Force

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14
Q

Which node sets the inherent rate of contraction for the heart

A

The sinoatrial node

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15
Q

Atrial depolarization initiated by the SA node is indicated by which wave on the ECG

A

The P wave

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16
Q

What happens at the QRS complex of the ECG

A

Atrial repolarization occurs

17
Q

Ventricular repolarization begins at the Apex causing which wave on the ECG

A

The T wave

18
Q

Which cranial nerve decreases heart rate and is it sympathetic or parasympathetic

A

Vagus nerve, parasympathetic

19
Q

Which nerve increases heart rate and force of contraction and is a sympathetic or parasympathetic

A

Vagus nerve, sympathetic

20
Q

What is caused by fatty deposits in the heart

A

Atherosclerosis

21
Q

What is the clinical term for chest pain

A

Angina pectoris

22
Q

What is a myocardial infarction

A

Heart attack

23
Q

What is caused by Progressive weakening of the heart where the heart cannot meet the body’s demand for oxygenated blood

A

Heart failure

24
Q

What happens when the heart enlarges and pumping efficiency declines

A

Congestive heart failure

25
Q

What is the enlargement and potential failure of the right ventricle

A

Pulmonary arterial hypertension

26
Q

What is rapid random firing of electrical impulses in the heart ventricles resulting from a crippled conducting system and is a common cause of cardiac arrest

A

Ventricular fibrillation

27
Q

What kinds of fibrillation promotes formation of clots which leads to Strokes from impulses Circle within the atrial myocardium stimulating the AV node

A

atrial fibrillation

Intro To Human Anatomy (2 decks)

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