BIOD 152 MODULE 2 EXAM 2 100% QUESTIONS AND ANSWERS GRADE A+ ASSURED

BIOD 152 MODULE 2 EXAM 2 100% QUESTIONS AND ANSWERS
GRADE A+ ASSURED
Question 1
Which of the three cranial meninges is the most superficial and is composed of tough, dense
connective tissue?
A) Pia mater
B) Arachnoid mater
C) Dura mater
D) Subdural space
E) Epidural space

Correct Answer: C) Dura mater
Rationale: The meninges consist of three layers. The dura mater is the outermost, toughest,
and most superficial layer, providing a durable protective covering for the brain and spinal
cord.

Question 2
Which meninx is a delicate, transparent layer that is tightly adhered to the surface of the brain,
following every sulcus and gyrus?
A) Dura mater
B) Arachnoid mater
C) Pia mater
D) Subarachnoid space
E) Falx cerebri

Correct Answer: C) Pia mater
Rationale: The pia mater is the innermost layer of the meninges. It is a very thin and highly
vascularized membrane that is intimately attached to the brain's surface, acting like shrink
wrap.

Question 3
The deep groove that separates the right and left cerebral hemispheres is known as the:
A) Central sulcus
B) Lateral fissure
C) Transverse fissure

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D) Median longitudinal fissure
E) Parieto-occipital sulcus

Correct Answer: D) Median longitudinal fissure
Rationale: The median longitudinal fissure is the prominent groove that runs along the
sagittal plane, dividing the cerebrum into its two distinct right and left hemispheres.

Question 4
Which major fissure separates the cerebrum from the underlying cerebellum?
A) Median longitudinal fissure
B) Central sulcus
C) Transverse cerebral fissure
D) Lateral fissure
E) Sylvian fissure

Correct Answer: C) Transverse cerebral fissure
Rationale: The transverse fissure is the deep groove that separates the posterior aspect of
the cerebrum (specifically the occipital lobes) from the superior surface of the cerebellum.

Question 5
What is the primary function of the brain's ventricles?
A) To store and retrieve long-term memories.
B) To produce and circulate cerebrospinal fluid (CSF).
C) To act as the primary relay station for sensory information.
D) To regulate the body's sleep-wake cycles.
E) To control voluntary motor movements.

Correct Answer: B) To produce and circulate cerebrospinal fluid (CSF).
Rationale: The ventricles are a system of interconnected, fluid-filled chambers within the
brain. Specialized tissue within the ventricles, called the choroid plexus, is responsible for
producing CSF. This fluid then circulates through the ventricles and into the subarachnoid
space, where it provides buoyancy, protection, and chemical stability for the brain.

Question 6
The blood-brain barrier is formed and maintained primarily by which type of glial cell?

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A) Oligodendrocytes
B) Ependymal cells
C) Microglia
D) Schwann cells
E) Astrocytes

Correct Answer: E) Astrocytes
Rationale: The blood-brain barrier is a highly selective barrier formed by the endothelial
cells of the brain's capillaries. The "feet" of astrocytes wrap around these capillaries and
induce the formation of tight junctions between the endothelial cells, making them
relatively impermeable and thus forming the barrier.

Question 7
Which of the following is NOT a function of the hypothalamus?
A) Regulating body temperature.
B) Controlling the endocrine system via the pituitary gland.
C) Regulating hunger and thirst.
D) Relaying sensory impulses from the body to the cerebrum.
E) Controlling autonomic nervous system responses.

Correct Answer: D) Relaying sensory impulses from the body to the cerebrum.
Rationale: The hypothalamus is a major control center for homeostasis. Relaying sensory
information to the cerebral cortex is the primary function of the thalamus, not the
hypothalamus.

Question 8
Which of the four brain ventricles is located in the brainstem, anterior to the cerebellum?
A) The right lateral ventricle
B) The left lateral ventricle
C) The third ventricle
D) The fourth ventricle
E) The cerebral aqueduct