BIOD 152 MODULE 4 ACTUAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ What protects the brain. Answer: skull, meninges, and BBB
◉ Ventricles of the brain. Answer: cavities within the brain filled
with cerebrospinal fluid; 2 lateral, 3rd ventricle, 4th ventricle
◉ Meninges. Answer: 3 layers of connective tissue that cover and
protect the CNS organs and enclose CSF.
◉ Dura Mater. Answer: thick, outermost layer of the meninges
surrounding and protecting the brain and spinal cord
◉ pia mater. Answer: the delicate innermost membrane enveloping
the brain and spinal cord.
◉ CSF. Answer: special fluid formed in walls of ventricles from blood
plasma by permeating through the choroid plexus; cushions the
brain and spinal cord by providing buoyancy, allowing the brain to
float.
, ◉ BBB. Answer: diffusion barrier that prevents most particles from
entering CNS tissue; brain and spinal cord separate from general
blood circulation. Formed by impermeable brain capillaries, due to
astrocytes due to need for stable chemical environment.
◉ Cerebrum. Answer: largest part of the brain, 83%; includes
median longitudinal fissure, left and right cerebral hemispheres,
gyri, sulci, and fissures
◉ corpus callosum. Answer: A bridge of white nerve fibers that
connect cerebral hemispheres
◉ Cerebral cortex. Answer: outer region of the cerebrum, containing
sheets of nerve cells; gray matter of the brain
◉ Deep sulci. Answer: frontal, parietal, temporal, occipital
◉ Frontal sulci. Answer: controls higher level executive fx like
reasoning and decision making; controls motor fx and control over
voluntary muscle actions
◉ parietal lobe. Answer: A region of the cerebral cortex whose
functions include processing information about touch; receive
sensory info from receptors in mouth for taste and in skn four touch,
pain, and pressure.
QUESTIONS WITH SOLUTIONS GRADED A+
◉ What protects the brain. Answer: skull, meninges, and BBB
◉ Ventricles of the brain. Answer: cavities within the brain filled
with cerebrospinal fluid; 2 lateral, 3rd ventricle, 4th ventricle
◉ Meninges. Answer: 3 layers of connective tissue that cover and
protect the CNS organs and enclose CSF.
◉ Dura Mater. Answer: thick, outermost layer of the meninges
surrounding and protecting the brain and spinal cord
◉ pia mater. Answer: the delicate innermost membrane enveloping
the brain and spinal cord.
◉ CSF. Answer: special fluid formed in walls of ventricles from blood
plasma by permeating through the choroid plexus; cushions the
brain and spinal cord by providing buoyancy, allowing the brain to
float.
, ◉ BBB. Answer: diffusion barrier that prevents most particles from
entering CNS tissue; brain and spinal cord separate from general
blood circulation. Formed by impermeable brain capillaries, due to
astrocytes due to need for stable chemical environment.
◉ Cerebrum. Answer: largest part of the brain, 83%; includes
median longitudinal fissure, left and right cerebral hemispheres,
gyri, sulci, and fissures
◉ corpus callosum. Answer: A bridge of white nerve fibers that
connect cerebral hemispheres
◉ Cerebral cortex. Answer: outer region of the cerebrum, containing
sheets of nerve cells; gray matter of the brain
◉ Deep sulci. Answer: frontal, parietal, temporal, occipital
◉ Frontal sulci. Answer: controls higher level executive fx like
reasoning and decision making; controls motor fx and control over
voluntary muscle actions
◉ parietal lobe. Answer: A region of the cerebral cortex whose
functions include processing information about touch; receive
sensory info from receptors in mouth for taste and in skn four touch,
pain, and pressure.
