Nervous System 114-129

Question 0

Gray matter has which three types of horns…

Answer 0

Dorsal posterior horns-sensory fibers and interneurons
Ventral anterior horns-nerve cell bodies of motor neurons
Lateral horn-in thoracic and lumbar regions, nerve cell bodies of sympathetic system

Question 1

The spinal cord is elongated mass of nervous tissue that transmits electrical signals between the periphery and the brain. The two major functions of the SC are…

Answer 1

Carries nerve impulses and Center for spinal reflexes

Question 2

*** Lateral horn

Answer 2

Located in thoracic and lumbar regions, nerve cell bodies of sympathetic ns

Question 3

***dorsal root

Answer 3

Sensory fibers pass through

Question 4

***ventral root

Answer 4

Motor fibers pass through

Question 5

Knee-jerk reflexes use _______ neurons.

Withdrawal reflexes use ________ neurons.

Answer 5

2;3

Question 6

This system is part of the PNS that operates continuously without conscious thought.

Answer 6

Autonomic nervous system

Question 7

Visceral efferent nerve fibers associated with the ganglia make up the…

Answer 7

Autonomic n.s.

Question 8

Sympathetic vs parasympathetic

Answer 8

SNS primarily prepares the body for energy expending stressful or emergency situations fight or flight (shoot)

Parasympathetic ns- functions under normal everyday activities and to return the body to normal after sympathetic discharge (point)

Question 9

All Autonomic fibers are ________ fibers.

Afferent or efferent

Answer 9

Efferent motor fibers

Always two neurons, a preganglionic fiber and a postganglionic fiber

Question 10

White rami vs gray rami

Answer 10

White rami-preganglionic fibers are short, myelinated

Gray rami-postganglionic fibers are long, unmylinated

Question 11

The parasympathetic division is also known as…

Answer 11

Craniosacral division

Question 12

Paras. Division
Preganglionic fibers-
Postganglionic fibers-

Answer 12

Pre-long, myelinated

Post-short, unmyelinated (ganglion -> organ)

Question 13

Parasympathetic fibers are carried in what nerves from the brain?

Answer 13

Three, seven, nine, ten, S2-S4

Question 14

Autonomic neurotransmitters

Answer 14

Preganglionic of paras. and sym divisions, postganglionic of parasympathetic division all secrete Ach acetylcholine. They are cholinergic fibers***

Question 15

The postganglionic fibers secrete _______ and are ________.

Answer 15

Norepinephrine; adrenergic

Question 16

***BV only have ________ intervention.

Answer 16

Sympathetic

Question 17

Digestive system is controlled primarily by _______ system.

Answer 17

Parasympathetic

Question 18

***Ach (Acetylcholine) binds to what two receptor tyes

Answer 18

Mucarinic receptors- located at ends of all postg. paras. fibers.. Responses are excitatory and slow

Nicotinic receptors- occurs synapses b/w pregang. and postga. neurons of both divisions

Question 19

NE and Epi combine with ______ receptors.

Answer 19

Adrenergic.
NE excitatory
Epi inhibitory

Question 20

Enteric n.s. controls the ____________ __________ activity.

Answer 20

Gastrointestinal tract; has as many neurons as all of the spinal cord

Question 21

The PNS includes the ______ nerves and the _______ nerves.

Answer 21

Cranial and spinal

Question 22

Cranial and spinal nerves that connect the CNS to skin and skeletal muscle are part of the…

Answer 22

Somatic nervous system (of the peripheral nervous system)

Concious activities

Question 23

Nerve fibers connecting the CNS to the viscera (internal organs) and are involved with unconscious activities are part of the…

Answer 23

Autonomic n.s.

This is all part of the peripheral nervous system