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Anatomy > 02/07 > Flashcards

02/07 Flashcards

1
Q

The P wave describes the

A

Depolarization of the atria

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2
Q

The QRS wave describes the

A

Depolarization of the ventricles

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3
Q

The T wave describes how

A

Ventricles repolarize

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4
Q

Ventricles contract during what phase?

A

Ejection

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5
Q

Contraction happens when the ventricles

A

Depolarize

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6
Q

O2 rich blood leaves the heart via

A

Aorta from the left ventricle

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7
Q

O2 poor blood leaves the heart via

A

Pulmonary SL valve to lungs

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8
Q

The Bundle of HIS is found where?

A

IV septum

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9
Q

Whats the difference between the Vena Cava and the Pulmonary Trunk / Aorta?

A

It is thinner compared to the two

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10
Q

Blood vessels are

A

Organs

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11
Q

Both artery and vein have outer layer called

A

Tunica externa

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12
Q

What is the function of the Tunica externa?

A

It surrounds and supports a vein or artery

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13
Q

The Tunica Externa has associated connected tissue which

A

Provides structure

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14
Q

What is the space in a hollow organ called?

A

The lumen

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15
Q

What is found under the Tunica externa?

A

The Tunica media

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16
Q

The Tunica media has a layer of smooth muscle which

A

Is arranged in two layers: Circular and Longitudinal

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17
Q

What happens when longitudinal muscle contracts?

A

The blood vessel shortens

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18
Q

What happens when the circular muscle contracts?

A

The diameter constricts

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19
Q

What is the innermost layer of a blood vessel?

A

Tunica intima

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20
Q

The structure of a blood vessel wall depends on

A

The location of the blood vessel

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21
Q

What is the function of capillaries?

A

They connect veins to arteries

22
Q

Capillaries will converge into

A

Small veins called venules

23
Q

Venules converge into

A

Medium and large sized veins

24
Q

The aorta is an

A

Elastic artery

25
Q

The aorta branches out into

A

Muscular arteries

26
Q

Veins are converging, whereas arteries are

A

Branching

27
Q

What are the smallest of arteries?

A

Arterioles

28
Q

What is the function of Arterioles?

A

They branch and feed capillary beds

29
Q

Muscular arteries branch into

A

Arterioles

30
Q

What do capillaries lack?

A

The Tunica externa

31
Q

Which blood vessel has a bigger lumen?

A

Vein

32
Q

What are three types of arteries?

A
  1. Elastic
  2. Muscular
  3. Arterioles
33
Q

Aneurysm is due to

A

The weakening of the wall of the artery

34
Q

What does an Aneurysm result in?

A

A bulge and maybe burst of the blood vessel

35
Q

What is Atherosclerosis?

A

Plaque buildup in the coronary arteries

36
Q

What is a treatment for Atherosclerosis?

A

Inserting a stent, which facilitates blood flow

37
Q

Most body tissues will be in contact with

A

Capillaries

38
Q

What are Continuous Capillaries?

A

Capillaries with an endothelial layer with basement tissue

39
Q

How are the cells in Continuous Capillaries?

A

Tightly attached together with no gaps

40
Q

Continuous Capillaries are found in areas that need

A

Tight regulation

41
Q

Which are the leakier capillaries compared to Continuous?

A

Fenestrated

42
Q

Describe Fenestrated Capillaries?

A

They have little pores

43
Q

Fenestrated Capillaries are found in areas which

A

Need filtration, like the kidneys

44
Q

What are the most leakiest capillaries?

A

Sinusoid

45
Q

Why are Sinusoid Capillaries the leakiest?

A

They lack basement membranes

46
Q

Sinusoid Capillaries are found in areas in which

A

A lot of exchange is required

47
Q

How do capillary beds regulate how much blood is flowing?

A

Through the use of Sphincters

48
Q

What are Sphincters?

A

Modified bands of smooth muscle

49
Q

What happens when Sphincters contract?

A

They close the muscle

50
Q

What happens when Sphincters open?

A

The blood flowing from arterial goes out through entire capillary bed

51
Q

Capillaries are found in all tissues except

A
  • Cartilage
  • Epithelia
  • Cornea and Lens

Anatomy (46 decks)

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