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Anatomy 2402 > CH 19 Heart Part 1 > Flashcards

CH 19 Heart Part 1 Flashcards

1
Q

Arteries only carry oxygenated blood?

A

False! Most but not all carry oxygenated blood (Pulmonary trunk)

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2
Q

Veins only carry deoxygenated blood?

A

False! Most do but not all carry deoxygenated blood

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3
Q

Which side of the heart has oxygenated blood?

A

Left

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4
Q

Which side of the heart has deoxygenated blood?

A

Right

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5
Q

List all the great vessels.

A
  1. Pulmonary trunk
  2. Aorta
  3. Superior and inferior vena cava
  4. Pulmonary veins
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6
Q

What is the purpose of heart valves?***

A

Allows blood to flow in only one direction. And prevent backflow

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7
Q

Pulmonary circulation sends blood to the?

A

Lungs

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8
Q

Systematic circulation sends blood to the?

A

Entire body

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9
Q

Superior vena cava collects blood from?

A

Brain and superior part of body (above arms)

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10
Q

Inferior vena cave collects blood from?

A

Inferior part of body (below arms)

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11
Q

The heart is enclosed in a sac called the ___?

A

Paricardium

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12
Q

What structures are covered by endocardium?***

A
  1. Internal surface of the heart
  2. External surface of valves
  3. Linings of blood vessels
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13
Q

Desmosome function?

A

Interlock cardiac muscle (prevent heart from falling apart)

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14
Q

Gap-junction function?

A

Allows passage of ions

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15
Q

What are intercladed disks made of?

A

Desmosomes and gap-junctions

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16
Q

What is the coronary circulation purpose?

A

Provide the heart with its own private circulation

17
Q

What influences the heart beat?***

A

The ANS

18
Q

Conduction system function?

A

Ensure proper timing of contractions

19
Q

Cardioacceleratory***

  1. Which ANS division?
  2. Neurotransmitter?
  3. Binds to?
A
  1. Sympathetic
  2. NE
  3. Beta 1
20
Q

Cardioinhibitory***

  1. Which ANS division?
  2. Neurotransmitter?
  3. Binds to?
A
  1. Parasympathetic
  2. ACh
  3. Muscarinic
21
Q

Heart is innervated by which ANS division?***

A

BOTH (Dual innervation)

22
Q

Which ANS division affects contraction force and touches the heart itself?

A

Sympathetic

23
Q

Nodal cell function?

A

Initiate action potential (heart beat)

24
Q

Resting membrane potential of nodal cells is? (RMP)

A

-60mV (not stable)

25
Q

Na+ channel speed of nodal cells?

A

Slow

26
Q

Ca2+ channel speed of nodal cells?

A

Fast

27
Q

K+ channels are not slow or fast, instead they are?

A

Voltage gated

28
Q

SA nodes exhibit?

A

Autorhythmicity (Automatic contractions)

29
Q

Opening and closing of heart valves are caused by?***

A

Pressure gradient

Anatomy 2402 (33 decks)

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