(NSU) Chapter 1 & 2 Exam 2024/2025
With 100% Correct Answers
Neuron - correct answers ✔✔Functional unit of nervous system; consisting of a nerve cell body,
dendrites, axon.
What are the primary parts of a neuron? - correct answers ✔✔- Cell body
- Dendrites
- Axons
types of neurons - correct answers ✔✔afferent neurons, efferent neurons, (Interneurons?)
Afferent Neurons - correct answers ✔✔Axons that carry information *toward* the CNS
Afferent Neurons Example - correct answers ✔✔An afferent axon transmits information to the CNS when
the hand touches an object
Efferent Neurons - correct answers ✔✔Axons carry information *away* from the CNS.
Efferent Neurons Example - correct answers ✔✔Efferent axons carry motor commands from the CNS to
skeletal muscles
Interneurons - correct answers ✔✔CNS neurons that internally communicate and intervene between the
sensory inputs and motor outputs. Process information locally or conveying info short distances.
White matter - correct answers ✔✔Whitish nervous tissue of the CNS consisting of axons and myelin.
Convey information *AWAY* from the cell body.
, A bundle of myelinated axons that travel together in the CNS is called a _______? - correct answers
✔✔Tract, lemniscus, fasciculus, column, peduncle, or capsule.
(Will look at each of these later on)
Areas with large proportion of myelin appear white bc of the _____? - correct answers ✔✔High fat
content of myelin
Gray Matter - correct answers ✔✔Primarily cell bodies in which information is integrated. Includes
*Ganglia, Nuclei, or Cortex*
Information is integrated in __________? - correct answers ✔✔Gray matter
Peripheral Nervous System (PNS) - correct answers ✔✔A division of the nervous system consisting of all
nerves that are *not* encased in the vertebral column or skull.
Peripheral Components, Somatic Nervous System - correct answers ✔✔- Axons
- Sensory nerve endings
- Glial cells
Peripheral Components, Autonomic Nervous System - correct answers ✔✔- Entire neurons,
- Sensory endings, -
- Synapses
- Ganglia
- Glia
+ Sympathetic & Parasympathetic
Central Nervous System (CNS): - correct answers ✔✔Three Regions
- Spinal
- Brainstem & Cerebellar
- Cerebrum