NERVOUS SYSTEM EXAM WITH 100% CORRECT ANSWERS { GRADED A+}

NERVOUS SYSTEM EXAM WITH 100%

CORRECT ANSWERS { GRADED A+}




2 major components - ✔✔central nervous system and peripheral

nervous system

central nervous system - ✔✔cerebral cortex, cerebellum,

diencephalon, brainstem, spinal cord

peripheral nervous system - ✔✔cranial and spinal nerves

autonomic nervous system - ✔✔sympathetic and

parasympathetic

somatic - ✔✔efferent and afferent

efferent - ✔✔motor

afferent - ✔✔sensory

cerebral cortex function - ✔✔covers the brain

-4 lobes

, motor neurons - ✔✔responsible for muscular contraction or

glandular secretion (about 3 million)

sensory neurons - ✔✔receive info from the periphery and

communicate that within the CNS (20 mil in spinal/cranial neves)

interneuron - ✔✔provide communication between/among

neurons (about 25% of cerebral cortex neurons)

glial cells - ✔✔(glue) neuroglia; support/protect, about 1 trillion of

them

types of glial cells - ✔✔astrocytes, microglia, oligodendrocytes,

schwann cells, ependymal cells

astrocytes - ✔✔(regulation of ions and neurotransmitters)-->

blood brain barrier

microglia - ✔✔macrophages

Oligodendroglia - ✔✔increase rate of impulse conduction

through axon

Schwann cells - ✔✔creation of myelin in PNS