ESTUDYR
BIOL251: Human Anatomy & Physiology I w/Lab
Module 6 – Nervous System, Nervous Tissue
& CNS
Section 1: Nervous Tissue & Neurophysiology
Question 1
Which type of neuroglial cell forms the myelin sheath in the central nervous
system?
● A) Schwann cells
● B) Astrocytes
● C) Microglia
● ✅D) Oligodendrocytes
● E) Ependymal cells
Rationale: Oligodendrocytes myelinate axons in the CNS, increasing conduction
speed. Schwann cells perform this role in the PNS.
Question 2
Which structure of a neuron is responsible for receiving incoming signals?
● A) Axon
● ✅B) Dendrites
● C) Axon terminal
● D) Myelin sheath
● E) Node of Ranvier
Rationale: Dendrites receive synaptic input from other neurons and transmit
signals toward the cell body.
,ESTUDYR
Question 3
The resting membrane potential of a neuron is primarily established by which ion?
● A) Calcium
● ✅B) Potassium
● C) Sodium
● D) Chloride
● E) Magnesium
Rationale: Potassium leakage through membrane channels is the main determinant
of the resting membrane potential.
Question 4
Saltatory conduction occurs in which type of axon?
● A) Unmyelinated axons
● ✅B) Myelinated axons
● C) Short axons only
● D) Sensory neurons only
● E) Interneurons only
Rationale: In myelinated axons, action potentials jump between nodes of Ranvier,
increasing conduction speed.
Question 5
Which event immediately follows depolarization during an action potential?
● A) Resting phase
● ✅B) Repolarization
● C) Hyperpolarization
● D) Threshold
● E) Absolute refractory period
,ESTUDYR
Rationale: Repolarization occurs when potassium exits the cell, restoring the
negative membrane potential.
Section 2: Brain Waves & Consciousness
Question 6
Which brain wave pattern is most commonly associated with deep sleep?
● A) Alpha
● B) Beta
● C) Theta
● ✅D) Delta
● E) Gamma
Rationale: Delta waves are slow, high-amplitude waves seen during deep sleep
and unconsciousness.
Question 7
Alpha waves are typically observed when an adult is:
● A) Solving complex problems
● ✅B) Awake but relaxed with eyes closed
● C) In deep sleep
● D) In a coma
● E) Experiencing REM sleep
Rationale: Alpha waves reflect relaxed alertness without focused mental activity.
Section 3: Meninges & CSF
, ESTUDYR
Question 8
Which meningeal layer directly adheres to the surface of the brain?
● A) Dura mater
● B) Arachnoid mater
● ✅C) Pia mater
● D) Falx cerebri
● E) Tentorium cerebelli
Rationale: Pia mater is a thin, vascular membrane that closely follows brain
contours.
Question 9
Cerebrospinal fluid is found in which space?
● A) Epidural space
● ✅B) Subarachnoid space
● C) Subdural space
● D) Ventricular wall
● E) Central canal only
Rationale: CSF circulates in the subarachnoid space between the arachnoid and
pia mater.
Section 4: Brain Anatomy (Image-Based Questions)
BIOL251: Human Anatomy & Physiology I w/Lab
Module 6 – Nervous System, Nervous Tissue
& CNS
Section 1: Nervous Tissue & Neurophysiology
Question 1
Which type of neuroglial cell forms the myelin sheath in the central nervous
system?
● A) Schwann cells
● B) Astrocytes
● C) Microglia
● ✅D) Oligodendrocytes
● E) Ependymal cells
Rationale: Oligodendrocytes myelinate axons in the CNS, increasing conduction
speed. Schwann cells perform this role in the PNS.
Question 2
Which structure of a neuron is responsible for receiving incoming signals?
● A) Axon
● ✅B) Dendrites
● C) Axon terminal
● D) Myelin sheath
● E) Node of Ranvier
Rationale: Dendrites receive synaptic input from other neurons and transmit
signals toward the cell body.
,ESTUDYR
Question 3
The resting membrane potential of a neuron is primarily established by which ion?
● A) Calcium
● ✅B) Potassium
● C) Sodium
● D) Chloride
● E) Magnesium
Rationale: Potassium leakage through membrane channels is the main determinant
of the resting membrane potential.
Question 4
Saltatory conduction occurs in which type of axon?
● A) Unmyelinated axons
● ✅B) Myelinated axons
● C) Short axons only
● D) Sensory neurons only
● E) Interneurons only
Rationale: In myelinated axons, action potentials jump between nodes of Ranvier,
increasing conduction speed.
Question 5
Which event immediately follows depolarization during an action potential?
● A) Resting phase
● ✅B) Repolarization
● C) Hyperpolarization
● D) Threshold
● E) Absolute refractory period
,ESTUDYR
Rationale: Repolarization occurs when potassium exits the cell, restoring the
negative membrane potential.
Section 2: Brain Waves & Consciousness
Question 6
Which brain wave pattern is most commonly associated with deep sleep?
● A) Alpha
● B) Beta
● C) Theta
● ✅D) Delta
● E) Gamma
Rationale: Delta waves are slow, high-amplitude waves seen during deep sleep
and unconsciousness.
Question 7
Alpha waves are typically observed when an adult is:
● A) Solving complex problems
● ✅B) Awake but relaxed with eyes closed
● C) In deep sleep
● D) In a coma
● E) Experiencing REM sleep
Rationale: Alpha waves reflect relaxed alertness without focused mental activity.
Section 3: Meninges & CSF
, ESTUDYR
Question 8
Which meningeal layer directly adheres to the surface of the brain?
● A) Dura mater
● B) Arachnoid mater
● ✅C) Pia mater
● D) Falx cerebri
● E) Tentorium cerebelli
Rationale: Pia mater is a thin, vascular membrane that closely follows brain
contours.
Question 9
Cerebrospinal fluid is found in which space?
● A) Epidural space
● ✅B) Subarachnoid space
● C) Subdural space
● D) Ventricular wall
● E) Central canal only
Rationale: CSF circulates in the subarachnoid space between the arachnoid and
pia mater.
Section 4: Brain Anatomy (Image-Based Questions)
