Structures Of The Nervous System: Chapter 6

Front 1

What are the components of the central nervous system? What are the components of the peripheral nervous system?

Back 1

CNS = spinal cord + brain
PNS = nerve fibers extending from the CNS

Front 2

what are the primary functions of the cerebral cortex?

Back 2

memory, attention, perceptual awareness, "thinking", language and consciousness.

Front 3

give examples of somatosensory sensations.

Back 3

touch or pressure, temperature (warm or cold), pain (including itch and tickle), and the sensations of muscle movement and joint position including posture, movement, and facial expression (collectively also called proprioception).

Front 4

The PNS includes both sensory and motor components. Describe what each component is.

Back 4

Sensory components detect environment signals and is formed by sensory receptor organs and afferent neurons. The motor components command effector organs to perform muscular or glandular activity.

Front 5

What are the two main classifications within PNS?

Back 5

Somatic nervous system and autonomic nervous system.

Front 6

Describe the somatic nervous system.

Back 6

part of the peripheral nervous system associated with the voluntary control of body movements through the action of skeletal muscles, and also reception of external stimuli. The somatic nervous system consists of afferent fibers that receive information from external sources, and efferent fibers that are responsible for muscle contraction.

Front 7

Describe the autonomic nervous system.

Back 7

the part of the peripheral nervous system that controls homeostasis

Front 8

Into what three classes is the autonomic nervous sytem divided?

Back 8

enteric, sympathetic, parasympathetic

Front 9

describe the enteric nervous system.

Back 9

the part of the nervous system that directly controls the gastrointestinal system

Front 10

Describe the sympathetic nervous system.

Back 10

best known for mediating the neuronal and hormonal stress response commonly known as the fight or flight response; utilized during emergency situations

Front 11

Describe the parasympathetic nervous system.

Back 11

"rest and digest" pathway; promotes normal maintenance of the body- acquiring building blocks and energy from food and getting rid of the wastes
It promotes secretions and mobility of different parts of the digestive tract.
Also involved in urination, defecation.

Front 12

what type of nervous system are somatic and autonomic divisions of?

Back 12

efferent division of PNS

Front 13

where are somatic efferent nerves found? what is the structure of somatic efferent neuron? what is the major neurotransmitter?

Back 13

innervate skeletal muscle; motor neurons

a single neuron between CNS and skeletal muscle cells

Ach is main neurotransmitter

Front 14

how do somatic neurons cause excitation and inhibition?

Back 14

activity in somatic neurons leads to contraction on innervated skeletal muscles

there are NO somatic neurons that inhibit skeletal muscle; muscle relaxation involves inhibition of motor neurons in the spinal cord

Front 15

what structures does the autonomic division innervate? describe structure and major function?

Back 15

smooth muscle, cardiac muslce, glands

consists of two neurons with ganglion in middle

major fxn is homeostasis

can be inhibitory/excitatory

Front 16

what are two divisions of autonomic nervous system?

Back 16

sympathetic nervous system and parasympathetic nervous system