(Portage) BIOD322 - Mod 1 Anatomy of the Nervous System - Final Assessment Guide .(Portage) BIOD322 - Mod 1 Anatomy of the Nervous System - Final Assessment Guide .(Portage) BIOD322 - Mod 1 Anatomy of the Nervous System - Final Assessment Guide .
,1. Which structure is responsible for the production of
cerebrospinal fluid (CSF)?
A. Choroid plexus
B. Arachnoid villi
C. Pia mater
D. Dura mater
Correct Answer: A
Rationale: The choroid plexus is the network of blood vessels
within the ventricles of the brain that is responsible for the
production of CSF.
2. The blood-brain barrier (BBB) is impermeable to many
substances. Which cell type is primarily responsible for the
maintenance of the BBB?
A. Neurons
B. Astrocytes
C. Oligodendrocytes
D. Microglia
Correct Answer: B
, Rationale: Astrocytes are star-shaped glial cells that contribute to
the BBB by regulating the transmission of substances from the
bloodstream into the brain.
3. Which of the following neurotransmitters is primarily excitatory
in the central nervous system?
A. GABA
B. Dopamine
C. Glutamate
D. Serotonin
Correct Answer: C
Rationale: Glutamate is considered the main excitatory
neurotransmitter in the central nervous system, playing a key role
in neural activation.
, Rationale: The parasympathetic nervous system is often referred
to as the "rest and digest" system, promoting activities such as
digestion.
5. In a neuron, the action potential is initiated at which part of the
cell?
A. Dendrites
B. Axon hillock
C. Cell body
D. Axon terminals
Correct Answer: B
Rationale: The axon hillock is the part of the neuron where the
cell body transitions to the axon, and it is typically where action
potentials are initiated due to the high concentration of voltage-
gated sodium channels.
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