Download The Nervous System

The Nervous System
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6. the section located below the cerebrum at
the top of the brainstem and is responsible for
conducting impulses between parts and for
certain eye and auditory reflexes.
10. carries impulses from the CNS to effector
organs, the muscles and the glands.
12. regulates events that are automatic or
involuntary, such as the activity of smooth
and cardiac muscle and glands.
13. dendrite endings o the sensory neurons
that are activated by specific changes
occurring.
15. a bundle of nerve fibers bound together by
connective tissue.
16. important autonomic nervous system
center because it plays a role in the regulation
of body temperature, water balance, and
metabolism.
1. transmit messages (nerve impulses) from
one part of the body to another.
2. tiny gap that separates the axon terminal
from the next neuron.
3. shallow grooves of the cerebral
hemispheres that separate gyri.
4. the outflow of positive ions (k+) from the
cell restores the electrical conditions at the
membrane to the polarized, or resting state.
5. is around the brain and cord that forms a
watery cushion that protects the nervous tissue
from trauma.
7. keeps the CNS constantly informed of
events going on both inside and outside the
body.
8. inward rush of sodium ions changes the
polarity of the neurons membrane at that site.
20. glia wrap their flat extensions (processes)
tightly around the nerve fibers, producing
fatty insulating covering called myelin
sheaths.
22. consists of the nerves that extend from the
brain and spinal cord.
23. a white, fatty lipid substance that covers
most long nerve fibers.
27. a condition where the head is enlarged as
the brain increases in size.
30. or interbrain that sits atop the brain stem
and is enclosed by the cerebral hemispheres.
32. brain and spinal cord. acts as the
integrating command centers o the nervous
system.
34. the rounded structure that protrudes just
below the midbrain, it is the area that is
mainly fiber tracts, and has important nuclei
involved in the control of breathing.
35. neuron process that convey incoming
messages (electrical signals) toward the cell
body.
36. slight brain injury where victim may be
dizzy or lose consciousness briefly.
37. a coarser connective tissue that wraps and
binds groups of neuron fibers.
39. connect the motor and sensory neurons in
neural pathways.
40. the three connective tissue membranes
covering and protecting the CNS structures.
41. are rapid, predictable and involuntary
response to stimuli.
42. allows us to voluntarily control our
skeletal muscles.
9. monitors health of nearby neurons and
dispose of debris.
11. forms the roof of the third ventricle.
12. neuron process that generates the nerve
impulses and typically conduct them away
from the cell body.
14. deeper grooves that separate large regions
of the brain.
17. plasma membrane of a resting/inactive
neuron.
18. sensory receptors in the muscles and
tendons that detect the amount of stretch, or
tension, in skeletal muscles.
19. elevated ridges of tissues on the entire
surface of the cerebral hemispheres.
21. bundle of neuronal processes (axons)
outside the CNS.
24. encloses the shallow third ventricle of the
brain.
25. a delicate connective tissue sheath that
surrounds neuron fibers.
26. includes many types of cells that generally
support, insulate, and protect the delicate
neurons.
28. brace neurons and anchor them to their
nutrient supply lines.
29. result of marked tissue destruction and
always result in a coma lasting from hours to
a lifetime due to injury to the reticular
activating system.
31. it processes and interprets the sensory
input and decides what should be done at each
moment.
33. a tough fibrous sheath that binds the
fascicles together to form the cordlike nerve.
36. the largest part of the brain; consists of
right and left cerebral hemispheres.
38. responsible for muscle coordination,
balance, posture, and muscle tone.