Chapter 15: Nervous System Autonomic Flashcards Preview

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Flashcards in Chapter 15: Nervous System Autonomic Deck (91)
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1

The somatic nervous system (SNS) includes processes that are ____ or controlled consciously.

perceived

2

The ____ sensory portion includes detection of stimuli and transmission of nerve signals from teh special senses (vision, hearing, equilibrium, smell and taste) skin, and propriocetors (receptors in joins and muscles that detect body positon) to the CNS.

somatic

3

The somatic ___ portion inolves initiation and transmission of nerve signals from the CNS to control ______.

motor portion
skeletal muscles

4

Both the sensory input we consciously perceive and the motor output we voluntarily initae to skeletal muscle inovle the _____.

cerebrum.

5

Reflexive skeletal muscle activity is controlled by the ____ and ___.

brainstem
spinal cord

6

The autonomic nervous system (ANS) also called teh autonomic motor or visceral motor system includes processes regulated below the _____ level.

conscious

7

The ANS is a motor system ___.

only

8

These autonomic motor components initate and transmit nerve signals from teh CNS to cardiac muscle, smooth muscle, and ____.

glands

9

The autonomic nervous sytem often responds to input from ____ sensory components such as receptors that detect stimuli associated with blood vessels and internal organs (viscera).

visceral sensory

10

The function of teh Autonomic Nervous system is to ___.

maintain homeostasis

11

The ANS regulates all _____ processes that must be maintained by the nervous system to keep the body alive including regulation of the HR, BP, and temp, seating, and digestion.

physiologic

12

The number of lower motor neurons that extend from the CNS differs between the somatic nervous system and the autonomic nerouvs system. A ___ lower motor neuron extends from the CNS to skeletal muscle fibers in teh somatic nervous system.

single

13

In teh somatic nervous system teh cell body of a lwoer motor neuron lies within teh brainstem or teh ____ and its axon exits the CNS in either a cranial nerve or a spinal nerve and extends to a skeletal muscle respectively.

spinal cord

14

The motor neurons fo teh somatic nervous system are composed of myelinated axons with large diameter allowing for fast propagation of a _____ and alwyas release _____ neurotransmitter from its synaptic knobs to stimulate or excite eh skeltetal muscle fiber.

nerve signal
ACh

15

The sensory input of somatic nervous system

special senses, skin, proprioceptors

16

The effectors of somatic nervous system _____.

skeletal muscle fibers

17

The CNS region of control of teh somatic nervous system includes the cerebral cortex, cerebral nuclei, thalamus, ______, brainstem, and spinal cord.

cerebellum

18

Number of motor neurons in somatic nervous system pathway

one neuron from CNS
somatic motor neuron axon extends from CNS to effector

19

in the somatic nervous system the xons are _____ and thicken in diameter, have ___ nerve signal propagation.

myelinated
fast

20

In the somatic nervous system the motor neurons release the neurotransmitter ____.

Acetylcholine ACh

21

The response of an effector inthe somatic nervous system is ____.

excitation only

22

There are ___ ganglia associated with motor neurons inthe somatic nervous system.

no

23

CNS region of control in the autonomic nervous system inlcudes the hypothalamus, brainstem, spinal cord, cerebrum, thalamus, and ____.

limbic system

24

number of motor neurons in the pathway of autonomic nervous system

2 neurons from CNS
preganglionic neuron has preganglionic axon that projects to ganglionic neuron
ganglionic neuron has postganglionic axon that projects to effector

25

IN the ANS the pregagnionic axons are myelinated and ___ in diameter.

thin

26

Postgaglionic axons in the ANS are ______ and are thinner in diameter, both have relatively slow nerve signal propagation.

unmyelinated

27

In the ANS preganglionic axons release ____.

ACh

28

In the ANS postganglionic axons release either ACh or ___.

norepinephrine NE

29

The motor neurons in the ANS either excitatior or _____

inhibition

30

The first of teh two ANS motor neurons is the preganglionic neuron and its cell body lies within the brainstem or ___.

spinal cord