Cardiovascular system; Blood vessels

56問 • 1年前

eiren

通報

問題一覧

Arteries carry blood ___ the heart

Away from

Arteries contain ___ blood

Oxygenated

Veins carry blood ___ the heart

Veins carry ___ blood

Deoxygenated

Veins carry deoxygenated blood except for

The pulmonary circulation

___ directly serve cellular needs

Capillaries

Capillaries are composed of

Endothelium

Delivers blood to body organs

Muscular arteries

Allow for exchange of materials

Capillaries

What are precapillary sphincters?

Cuff of smooth muscle at metarterles

What is the function of precapillary sphincters?

Regulate blood flow at capillary beds

Blood pressure in veins is ___ than in arteries

Lower

Common route of blood flow is

Heart → arteries→ arterioles → capillaries→ venules→ veins→ heart

Provide alternate pathways ( collateral channels) for blood to reach a given body region

Arterial anastomoses

Venous anastomoses are common

True

Blood flows through two consecutive capillary beds before returning to the heart

Portal system

Force per unit area that the blood exerts on the wall of a blood vessel

Blood pressure

Opposition to flow measured by the amount of friction blood encounters

Peripheral resistance

Blood viscosity

Thickness of blood

Increased blood viscosity equals ___ peripheral resistance

Increased

The longer the blood vessel, the ___ the resistance encountered

Greater

Increased blood vessel length equals ___ resistance

Increased

Anemia means ___ viscosity

Decreased

Dehydration means ___ viscosity

Increased

The greatest influence on resistance is

Blood vessel diameter

Vasoconstriction means ___ resistance and ___ blood flow

Increased, decreased

Vasodilation means ___ resistance and ___ blood flow

Decreased, increased

___ are the major determinants of peripheral resistance

Arterioles

Blood flow is ___ proportional to the difference in blood pressure

Directly

If blood pressure increases, blood flow ___

Increases

Blood flow is ___ proportional to peripheral resistance

Inversely

If peripheral resistance increases, blood flow ___

Decreases

Is peripheral resistance or blood pressure more important influencing local blood flow?

Peripheral resistance

If arteroles dilate, blood flow ___ whether blood pressure is unchanged or falling

Increases

The steepest change in blood pressure occurs in the ___

Arterioles

Blood flow moves from a ___ pressure to___ pressure

Higher, lower

Pressure exerted on arterial walls during ventricular contraction

Systolic pressure

Lowest level of arterial pressure during ventricular relaxation

Diastolic pressure

Hypertension

High blood pressure

Aneurysms can be caused by

Prolonged hypertension

Weakened area in an artery

Aneurysm

High blood pressure will rupture capillaries

True

Blood pressure is

Cardiac output X peripheral resistance

Cardiac output depends on

Blood volume

Cardiac output is

Stroke volume X heart rate

Stroke volume is controlled by ___

Venous return

Monitor changes in blood pressure

Baroreceptors

Baroreceptors are ___ receptors

Stretch

Regulates blood pressure in short term by changing peripheral resistance and cardiac output

Hormonal controls

Hormonal controls regulate blood pressure long term by regulating ___

Blood volume

Capillary hydrostatic pressure is

Filtration

Capillary colloid osmotic pressure is

Osmosis

Nondiffusible plasma proteins (mainly albumin) draw water towards themselves, creating;

Colloid osmotic pressure

Pressure of blood against capillary walls

Hydrostatic pressure

More fluids enter tissues than return to blood

True

Excess fluid is returned to the blood via the

Lymphatic system

211 exam 2 ch18 part 1

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211 exam 2 ch18 part 1

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211 exam 2 ch19 part 1

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211 exam 2 ch19 part 1

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The cardiac cycle

211 exam 2 ch22

211 exam 2 ch22

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211 lab quiz 4

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211 exam 3 ch 24

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211 lab quiz 4 urinary system

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211 exam 3 ch 23

211 exam 3 ch 25

211 exam 3 ch 25

211 exam 3 ch 26

211 exam 3 ch 26

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211 lab quiz 3 terms

General practice quiz

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General practice quiz

Quiz 5 histology

Quiz 5 histology

Hormones

Hormones

Diabetes

Diabetes

Reproductive system

Reproductive system

Endocrine system

Endocrine system

Blood

Blood

Lymphatic system

Lymphatic system

Cardiovascular system

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Cardiovascular system

Respiratory system

Respiratory system

Urinary System

Urinary System

Digestive system

Digestive system

Reproductive system

Reproductive system

Terminology

Terminology

Ch 1

Ch 1

Mini practical

Mini practical

Chapter 2

Chapter 2

Chapter 4

Chapter 4

Chapter 6

Chapter 6

Chapter 7

Chapter 7

Chapter l

Chapter l

Chapter 2

Chapter 2

Chapter 4

Chapter 4

Chapter 5 Microbial Metabolism

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Chapter 5 Microbial Metabolism

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Chapter 5 Microbial Metabolism

Mini practical 2

Mini practical 2

Skills 8

Skills 8

Chapter 6 Microbial Growth

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Chapter 6 Microbial Growth

Skills 7

Skills 7

Chapter 7 Control Of Microbial Growth

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Chapter 7 Control Of Microbial Growth

Skills 5

Skills 5

Chapter 8 Microbial Genetics

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Chapter 8 Microbial Genetics

Skills 4

Skills 4

Skills 6

Skills 6

Chapter 9

Chapter 9

Chapter 10

Chapter 10

Chapter 11

Chapter 11

Chapter 13

Chapter 13

Chapter 12 Fungi, Algae, Protozoa, Multicellular Parasites

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65問 • 1年前

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問題一覧

Arteries carry blood ___ the heart

Away from

Arteries contain ___ blood

Oxygenated

Veins carry blood ___ the heart

Veins carry ___ blood

Deoxygenated

Veins carry deoxygenated blood except for

The pulmonary circulation

___ directly serve cellular needs

Capillaries

Capillaries are composed of

Endothelium

Delivers blood to body organs

Muscular arteries

Allow for exchange of materials

Capillaries

What are precapillary sphincters?

Cuff of smooth muscle at metarterles

What is the function of precapillary sphincters?

Regulate blood flow at capillary beds

Blood pressure in veins is ___ than in arteries

Lower

Common route of blood flow is

Heart → arteries→ arterioles → capillaries→ venules→ veins→ heart

Provide alternate pathways ( collateral channels) for blood to reach a given body region

Arterial anastomoses

Venous anastomoses are common

True

Blood flows through two consecutive capillary beds before returning to the heart

Portal system

Force per unit area that the blood exerts on the wall of a blood vessel

Blood pressure

Opposition to flow measured by the amount of friction blood encounters

Peripheral resistance

Blood viscosity

Thickness of blood

Increased blood viscosity equals ___ peripheral resistance

Increased

The longer the blood vessel, the ___ the resistance encountered

Greater

Increased blood vessel length equals ___ resistance

Increased

Anemia means ___ viscosity

Decreased

Dehydration means ___ viscosity

Increased

The greatest influence on resistance is

Blood vessel diameter

Vasoconstriction means ___ resistance and ___ blood flow

Increased, decreased

Vasodilation means ___ resistance and ___ blood flow

Decreased, increased

___ are the major determinants of peripheral resistance

Arterioles

Blood flow is ___ proportional to the difference in blood pressure

Directly

If blood pressure increases, blood flow ___

Increases

Blood flow is ___ proportional to peripheral resistance

Inversely

If peripheral resistance increases, blood flow ___

Decreases

Is peripheral resistance or blood pressure more important influencing local blood flow?

Peripheral resistance

If arteroles dilate, blood flow ___ whether blood pressure is unchanged or falling

Increases

The steepest change in blood pressure occurs in the ___

Arterioles

Blood flow moves from a ___ pressure to___ pressure

Higher, lower

Pressure exerted on arterial walls during ventricular contraction

Systolic pressure

Lowest level of arterial pressure during ventricular relaxation

Diastolic pressure

Hypertension

High blood pressure

Aneurysms can be caused by

Prolonged hypertension

Weakened area in an artery

Aneurysm

High blood pressure will rupture capillaries

True

Blood pressure is

Cardiac output X peripheral resistance

Cardiac output depends on

Blood volume

Cardiac output is

Stroke volume X heart rate

Stroke volume is controlled by ___

Venous return

Monitor changes in blood pressure

Baroreceptors

Baroreceptors are ___ receptors

Stretch

Regulates blood pressure in short term by changing peripheral resistance and cardiac output

Hormonal controls

Hormonal controls regulate blood pressure long term by regulating ___

Blood volume

Capillary hydrostatic pressure is

Filtration

Capillary colloid osmotic pressure is

Osmosis

Nondiffusible plasma proteins (mainly albumin) draw water towards themselves, creating;

Colloid osmotic pressure

Pressure of blood against capillary walls

Hydrostatic pressure

More fluids enter tissues than return to blood

True

Excess fluid is returned to the blood via the

Lymphatic system