Chapter 12-13 Quiz Spinal Cord & Spinal Nerves, Brain & Cranial Nerves

structures of the spinal cord from the brain to the tailbone are

brain, level of foramen magnum, cervical enlargement, lumbosacral enlargement, conus medullaris, level of second lumbosacral vertebra, cauda equina, filum terminale

what is the large c-shaped mass of white matter that consists of nerve fibers that connect the two cerebral hemispheres

corpus callosum

the gray matter on the outer surface of the cerebrum is called the

cortex

the central sulcus separates the

frontal and parietal lobes

the spinal cord links _____to the brain

the PNS

the cerebrum develops from the embryonic region called the

telencephalon

from which germ layer does the nervous system form

ectoderm

how many enlargements of the spinal cord winner supply the extremities enter and leave

2

these structures are involved in electrical synapses

Gap junctions

T/F action potentials travel fastest on large-diameter myelinated axons

True

the middle thin spider-like meninx is the

arachnoid mater

the white matter of the cerebellum forms a branching Network known as the

arbor vitae

glial cells that are directly involved in defending the CNS against infection and injury include

astrocytes and microglial cells

protein synthesis in neurons occurs in

cell bodies or soma

tracts of white matter that connects the right and left hemispheres are composed of what kind of fibers

commissural

the membrane potential becoming more positive in value is called______ whereas, ___________ refers to the membrane potential becoming more negative than the resting membrane potential

depolarization; hyperpolarization

the thickest of the meninges is the

dura mater

the meninges and the related spaces in order from superficial to deep are

dura mater, subdural space, arachnoid mater, subarachnoid space, pia mater

what space, found between the vertebral wall and the dura mater is the area for injecting anesthesia for childbirth

epidural space

the part of the brain that connects the medulla to the midbrain is the

pons

the neurons that conduct information toward the CNS are

sensory neurons

control of the heart rate is not a function of what

the cerebellum

is a tapered cone like region immediately inferior to the lumbar enlargement

the conus medullaris

16 year old Jake is diagnosed with hydrocephaly what will this do if left untreated

the excess fluid will exert pressure on his brain

is associated with basic survival instincts of nutrition, memory and reproduction

the limbic system

it contains nuclei for regulation of heart rate and blood vessel

the medulla oblongata

T/F damage to the brain stem is usually fatal

true

for each ATP molecule used, the sodium potassium pump transports

two potassium into the cell and three sodium out of the cell

CSF is formed by tissue in the walls and roofs of the

ventricles of the brain