CH3 - structure of nervous system

Question 1

meninges

Answer 1

Dura mater - subdural space - arachnoid membrane - subarachnoid space (filled w CSF) - arachnoid trabeculae - pia mater (blood vessels) - surface of brain

Question 2

Choroid plexus

Answer 2

Specialized tissue in ventricles that secretes CSF (CSF circulates through ventricles then gets absorbed in subarachnoid space)

Question 3

Forebrain

Answer 3

Lateral ventricle –> telencephalon (cerebral cortex, basal ganglia, limbic system)

Third –> diencephalon (thalamus & hypothalamus)

Question 4

Midbrain & hindbrain

Answer 4

Cerebral aqueduct - mesencephalon (tectum & tegmentum)

Fourth - metencephalon (cerebellum & pons) & myelencephalon (medulla oblongata)

Question 5

Cingulate gyrus

Answer 5

limbic cortex in diencephalon, bug hypothalmic structure

Question 6

limbic system & basal ganglia

Answer 6

Located around media edge of cerebral hemispheres

group of subcortical nuclei in forebrain - control of movement

Question 7

diencephalon

Answer 7

thalamus - projects info

hypothalamus - controls ANS & endocrine system, behaviors related to survival

Question 8

Mesensephalon

Answer 8

Tectum “roof” - dorsal portion of mesencephalon, superior & inferior colliculi

Tegmentum “covering” - beneath tectum,

periaqueductal gray matter
substantia nigra
reticular formation (controls eye movements)
red nucleus
ventral tegmental area

Question 9

metencephalon

Answer 9

Cerebellum:

• Receives visual, auditory, vestibular & somatosensory info & info about individual muscle movements
• Modifies motor outflow - smoothing

Pons - relays info from cerebral cortex to cerebellum

Question 10

Medulla oblongata

Answer 10

regulation of cardiovascular system, respiration, skeletal muscle tone

Question 11

Spinal cord

Answer 11

distributes motor fibers,

collects somatosensory info,

contains some reflex circuits,

composed of vertebral column w 24 individual vertebrae, fused vertebrae & spinal roots

Surrounded grey matter then white matter

Question 12

PNS

Answer 12

Cranial nerves & spinal nerves

Question 13

cranial nerves

Answer 13

12 pairs attached to ventral surface of brain

Vagus nerve (10) regulates functions of organs inthoracic & abdominal cavities

oflactory bulbs (1) –> ofla info

Question 14

Spinal nerves

Answer 14

afferent axons bring info toward CNS

Question 15

ANS

Answer 15

Sympathetic - thoracic & lumbar

parasympathetic - cranial & sacral (bottom end)