Control Of BP&BV Part 1 Flashcards

1
Q

Neural-hormonal mechanisms are also called _________ control mechanisms because they act on organs from outside

A

Extrinsic

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2
Q

Neural-hormonal mechanism predominate over control of blood flow to ___-critical organs like kidneys, splanchnic organs, resting skeletal muscles

A

Non

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3
Q

What mechanism controls the HR and cardiac contractility?

A

Neural-hormonal

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4
Q

Cardiac muscle is under neural-hormonal control, whereas ________ blood vessels are under local control

A

Coronary

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5
Q

How does neural-hormonal control affect cardiac metabolic rate?

A

Increases

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6
Q

The increased metabolic rate acts via local metabolic control to _____ coronary arterioles, which increases coronary blood flow

A

Dilate

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7
Q

Neural-hormonal is _________ for local metabolic control to work

A

Required

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8
Q

What nervous system regulates the cardio system through these 2 mechanisms?
1) Release of NTs: Norepinephrine and ACh
2) Stimulate the release of epinephrine and norepinephrine from the adrenal medullar

A

Autonomic

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9
Q

What produces ACh?

A

Parasympathetic neurons

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10
Q

What do sympathetic neurons produce?

A

Norepinephrine

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11
Q

What are the receptors activated by epinephrine and norepinephrine called?

A

Adrenergic

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12
Q

What are the receptors for ACh?

A

Cholinergic receptors

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13
Q

What adrenergic receptors do vasoconstriction?

A

Alpha

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14
Q

Smooth muscle in arterioles- sympathetic NS can __________ some organs and thereby direct more blood flow to other non organs

A

Vasoconstrict

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15
Q

Smooth muscle in abdominal veins- venoconstriction causes a small increase in resistance to blood flow through an organ because veins offer ____ resistance to blood flow than arterioles

A

Less

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16
Q

What type of receptor is every cardiac muscles cell of the heart?

A

Beta 1- adrenergic receptors

17
Q

Beta 1 adrenergic receptors __________ pacemaker rate and contractility, speeds cell-to cell propagation of APs, and ___________ refractory period

A

Increases
Decreases

18
Q

Beta 1 adrenergic receptors __________ HR and stroke volume

A

Increase

19
Q

B _ adrenergic receptors: arterioles in coronary circulation and skeletal muscles

A

2

20
Q

B _ adrenergic vasodilation can overpower alpha adrenergic vasoconstriction in the coronary circulation and in skeletal muscles

A

2