CV System: Nervous Regulation Of The Circulation

Question 1

Primary nervous system influence in regulating circulation

Answer 1

SNS

Question 2

Assists in regulation of heart function

Answer 2

PSNS

Question 3

Where do sympathetic vasomotor nerves leave the spinal cord

Answer 3

Thoracic and L1L2

Question 4

SNS innervated all vessels except

Answer 4

Capillaries, pre capillary sphincter a, metarterioles (in most cases)

Question 5

Stimulation of veins does what

Answer 5

Decreases volume

Question 6

Condition in which blood vessels are inadequately filled and blood can’t circulate normally

Answer 6

Circulatory shock

Question 7

Types of circulatory shock

Answer 7

Hypovolemic, vascular, cardiogenic

Question 8

Life-threatening condition that results when you lose more than 20% of your body’s blood or fluid supply

Answer 8

Hypovolemic shock

Question 9

Characterized by normal blood volume, but extreme vasodilation, often related to a loss of vasomotor tone, resulting in poor circulation and a rapid drop in BP

Answer 9

Vascular shock

Question 10

Condition in which your heart suddenly cannot pump enough blood to meet your body’s needs. Comfy caused by a severe heart attack

Answer 10

Cardiogenic shock

Question 11

Sympathetic nerves carry many _____ fibers, and few ____ fibers

Answer 11

Vasoconstrictor

Vasodilator

Question 12

Largest distribution of vasoconstrictor fibers

Answer 12

Kidneys, intestines, spleen, and skin

Question 13

Which type of fibers are less distributed to skeletal muscle and brain

Answer 13

Vasoconstrictor fibers (SNS)

Question 14

Carotid sinus baroreceptors linked to which nerve

Answer 14

Glossopharyngeal

Question 15

Aortic arch baroreceptors linked to which nerve

Answer 15

Vagus

Question 16

Maintains normal vasomotor tone and contributes to maintenance of BP

Answer 16

Vasoconstrictor area of vasomotor center (SNS)

Question 17

What area of vasomotor center secretes norepinephrine

Answer 17

Vasoconstrictor area

Question 18

Neuronal fibers in this area project up toward the vasoconstrictor area to inhibit the vasoconstrictor area

Answer 18

Vasodialator area of vasomotor center

Question 19

Helps control vasoconstrictor and vasodilator areas from nerve impulses received from vagus and Glossopharyngeal nerves

Answer 19

Sensory area of vasomotor center

Question 20

Receives SNS stimulation at the same time as blood vessels to secrete nor and epinephrine into the blood system

Answer 20

Adrenal medulla

Question 21

T/F epinephrine always causes vasoconstriction

Answer 21

F occasionally causes vasodilation in some tissues

Question 22

Adjusts rate and force of heart contraction to meet needs of the body.. Adjacent to part of the vasomotor center

Answer 22

Cardiac center

Question 23

Two parts of cardiac center

Answer 23

Cardioaccelerator and cardio inhibitory centers

Question 24

Cardiac center + vasomotor center

Answer 24

Cardiovascular center

Question 25

Stimulation of vasomotor center under normal conditions also stimulates cardiac centers, therefore

Answer 25

Heart and vascular function simultaneously
(Increased vasoconstriction w/ increased HR (SNS))
(Vasodilation w/ decreased HR (PSNS))

Question 26

What is the most rapid of responses

Answer 26

Nervous system control of BP

Question 27

Does the nervous system control of BP happen quicker when raising or lowering BP

Answer 27

Raising (2x in 5-10 sec)

Decrease is slower (1/2 normal in 10-40 sec)

Question 28

What happens when there is an increase in Arterial Pressure

Answer 28

Stimulation of vasoconstrictor and cardioaccelerator

Reciprocal inhibition of PSNS Vaal signals to the heart

Question 29

3 results of an increase in arterial pressure

Answer 29

Arterioles and veins constrict

SNS stimulation of Heart

Question 30

What systems are in place to monitor and maintain normal arterial BP

Answer 30

Subconscious reflex systems

Question 31

Where are baroreceptors located

Answer 31

Carotid sinuses, aortic arch, and walls of nearly every large after in neck and thorax

Question 32

T/F baroreceptors only respond to stretch

Answer 32

F also respond to lack of stretch in the vessel walls

Question 33

A decline in MAP initiates reflex vasoconstriction and increases

Answer 33

CO - so the BP rises

Question 34

What is the function of baroreceptors

Answer 34

Protect circulation agains acute changes in BP

Question 35

When are baroreceptors ineffective

Answer 35

Prolonged pressure changes

EX- hypertension

Question 36

What respond to changes in O2, CO2, and H+

Answer 36

Chemoreceptors control of arterial BP

Question 37

Which control center is important at low arterial pressures

Answer 37

Chemoreceptor control center

Question 38

What happens to gasses with a drop in arterial pressure

Answer 38

Decreased O2

Increased CO2 and H+

Question 39

Reflexes that respond to change in pressure within the walls of the atria

Answer 39

Artrial reflexes

Question 40

Minimize arterial pressure changes

Answer 40

Low-pressure receptors

Question 41

With increase arterial pressure, will gen an increase in HR and strength of contraction to prevent blood from backing up into system

Answer 41

Bainbridge Reflex

Question 42

Damage to atria can reduce effective response to

Answer 42

Pressure changes

Question 43

Occurs when blood flow to vasomotor center is severely decreased

Answer 43

CNS Ischemic Response

Question 44

What happens to arterial pressure when there is a CNS ISchemic response

Answer 44

Large rise (strong reaction of vasoconstrictor and cardioaccelerator centers

Question 45

Most powerful activator of SNS vasoconstrictor system

Answer 45

CNS Ischemic Response

Question 46

Branches of autonomic nervous system

Answer 46

SNS

PSNS