A&P 2 Module 2 problem set | 100% Verified Answers
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BIO 152
Instelling
Portage Learning
A&P 2 Module 2 problem set The Brain 1. List the four parts of the human brain. 2. Describe the number, location and function of the brain ventricles. 3. Label the ventricles. 4. Describe the brain meninges and the layers. 5. What is the function of the choroid plexus? 6. What is the blood-brain ba...
2. Describe the number, location and function of the brain
ventricles.
3. Label the ventricles.
4. Describe the brain meninges and the layers.
5. What is the function of the choroid plexus?
6. What is the blood-brain barrier and how is it maintained?
7. Describe the cerebrum.
8. What is the median longitudinal fissure?
9. Raised ridges on the cerebrum are called .
10. The separates the cerebrum from the cerebellum.
Your Answer:
1. Cerebral, diencephalon, brainstem, and cerebellum
2. There are four ventricles in the interior of the brain, chambers filled
with cerebrospinal fluid which is produced there
3. 2 lateral ventricles, third and fourth ventricle
4. The layers include the dura mater, arachnoid membrane, and the
pia mater. All three function to cover and protect the brain. The dura
mater is the outer layer, surrounding the brain and spinal cord. It is
tough, durable and has inelastic protection. The arachnoid membrane
is below the dura mater. It resembles a matrix of spider webs. The pia
mater is the layer closest to the brain and spinal cord.
5. Regulating inflammatory cells in the CNS as well as in monitoring
the synthesis, composition, and circulation of cerebrospinal fluid
6. Isolates the CNS from the general circulation; formed by astrocytes
which maintain the barrier by secreting chemicals
7. The foremost part of the brain, is the largest part of the brain in
humans comprising about 83% of total brain mass
8. Separates the left and right cerebral hemispheres from one another
,9. Gyri
10. Transverse fissure
1. The human brain is made up of the cerebral hemispheres,
diencephalon, brain stem, and cerebellum.
2. There are four ventricles in the interior of the brain, chambers
filled with cerebrospinal fluid which is produced there.
3. See figure in module.
4. The meninges are three layers of connective tissue membranes
that cover and protect central nervous system organs and
enclose cerebrospinal fluid. The leathery dura mater is the
double-layered outer meninx. The middle arachnoid meninx is a
loose layer separated from the dura mater by the subdural
space. Beneath the arachnoid meninx is the subarachnoid space
which contains blood vessels and is filled with cerebrospinal
fluid. The inner pia mater meninx is a thin connective tissue
tightly attached to the brain.
5. The choroid plexus produces cerebrospinal fluid.
6. The blood-brain barrier is a diffusion barrier which prevents most
particles from entering the central nervous system tissue,
keeping the brain and spinal cord separate from general blood
circulation. The blood-brain barrier is formed by the relatively
impermeable brain capillaries, due to the glial cells astrocytes.
Maintenance of the blood-brain-barrier is important to provide a
stable chemical environment for the nervous system. A stable
internal environment is important to protect neurons from
chemical variations which could cause uncontrollable firing of
neurons.
7. The cerebrum, the foremost part of the brain, is the largest part
of the brain in humans comprising about 83% of total brain
mass
8. It separates the left and right cerebral hemispheres from one
another.
9. Gyri
10. The transverse fissure
Question 2
pts
The Brain
11. The outer portion of the cerebral hemispheres is called the
and is highly convoluted and gray in color.
12. Describe the functions of the lobes of the cerebrum.
, 13. What is the difference between a primary area and an
association area in the brain?
14. Label the regions of the cerebral cortex.
15. List the three major parts of the brain stem.
16. How is the medulla oblongata involved with the heart and lungs?
17. How is the pons involved with the eyes and ears?
18. The superior and inferior colliculi are located on the posterior
portion of the .
19. How is the hypothalamus involved with the entire internal
environment of the body and the endocrine system in particular?
20. All except what sensory impulses are channeled through the
thalamus?
Your Answer:
11. cerebellum
12. Frontal lobe- controls higher level executive functions, such as
reasoning and decision making. Parietal lobe- receives sensory info
from receptors in the mouth for taste and located in the skin. Occipital
lobe- interprets visual input. Temporal lobe- has sensory areas for
hearing and smelling
13. Primary areas in each lobe receive or send info for one type of
sensory or motor info. Association areas act mainly to integrate more
than one type of sensory info for purposeful action
14. Hippocampus, amygdala, cingulate gyrus
15. Midbrain, pons, medulla oblongata
16. The cardiac, respiratory, and vasomotor control centers are in the
medulla. This means that the medulla controls heart rate, blood
pressure, breathing, and the size of the body's blood vessels
17. Contains nuclei that relay signals from the forebrain to the
cerebellum
18. Midbrain
19. It is responsible for maintaining your body's internal balance, which
is known as homeostasis. To do this, the hypothalamus helps stimulate
or inhibit many of your body's key processes, including: Heart rate and
blood pressure
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