Anatomy Of The Meninges And Ventricular System
In this quiz we’ll be testing your knowledge on the Anatomy of the Meninges and Ventricular System, which is defined as the set of four interconnected cavities in the brain where cerebrospinal fluid in produced. What can you tell us about these systems? Let’s find out.
- 1.
There are three meningeal layers that surround the brain. The outermost layer is called the:
Explanation
The outermost layer that surrounds the brain is called the dura mater.Rate this question:
- 2.
The dura mater consists of 2 layers called the periosteal layer and the meningeal layer. These are noramlly fused but separate at certain locations to form what 2 structures?
- A.
Subarachnoid space
- B.
Dural partition
- C.
Dural sinus
- D.
Meningeal arteries
Correct Answer(s)
B. Dural partition
C. Dural sinusExplanation
The dura mater, the outermost layer of the meninges, is composed of two layers: the periosteal layer and the meningeal layer. These layers are typically fused together, but they can separate at certain locations to form two structures: the dural partition and the dural sinus. The dural partition refers to the areas where the two layers of the dura mater separate to create compartments within the cranial cavity. The dural sinus, on the other hand, refers to the spaces formed between the two layers of the dura mater where venous blood collects and drains.Rate this question:
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- 3.
Which of the following dural sinuses are paired?
- A.
Transverse
- B.
Superior sagittal
- C.
Inferior sagittal
- D.
Cavernous
- E.
Basilar
- F.
Occipital
- G.
Straight
- H.
Sigmoid
- I.
Inferior petrosal
- J.
Superior petrosal
- K.
Sphenoparietal
- L.
Confluence of sinuses
Correct Answer(s)
A. Transverse
D. Cavernous
H. Sigmoid
I. Inferior petrosal
J. Superior petrosal
K. SphenoparietalExplanation
The dural sinuses that are paired are the transverse, cavernous, sigmoid, inferior petrosal, superior petrosal, and sphenoparietal sinuses. These sinuses are found on both sides of the brain and play a role in draining blood and cerebrospinal fluid from the brain.Rate this question:
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- 4.
The great cerebral vein and the inferior sagittal sinus together form the straight sinus.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because the great cerebral vein and the inferior sagittal sinus do indeed come together to form the straight sinus. The straight sinus is an important blood vessel located in the brain, and it plays a role in draining blood from the brain into the larger veins of the body.Rate this question:
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- 5.
Select the best answer: The cavernous sinuses lie either side of which structure?
- A.
Sphenoidal sinus
- B.
Parotid gland
- C.
Sella turcica
Correct Answer
C. Sella turcicaExplanation
The cavernous sinuses lie either side of the sella turcica. The sella turcica is a depression in the sphenoid bone of the skull that houses the pituitary gland. The cavernous sinuses are a pair of large venous channels located on either side of the sella turcica. They are important structures that receive blood from various veins and play a role in draining blood from the brain.Rate this question:
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- 6.
The tentorium cerebelli is the largest of the dural partitions, dividing the cerebrum sagittally into its left and right hemispheres.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The correct answer is falx cerebriRate this question:
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- 7.
The smallest of the dural partitions is called the diaphragma sellae. It lies in the horizontal plane and lines the pituitary fossa in the sella turcica of the sphenoid bone.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The diaphragma sellae is indeed the smallest of the dural partitions and it is located in the sella turcica of the sphenoid bone. It lines the pituitary fossa and is positioned in a horizontal plane. Therefore, the statement is true.Rate this question:
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- 8.
Which dural partition separates the cerebrum from the cerebellum transversally? It attaches onto the anterior and posterior clinoid processes of the sphenoid bone anteriorly and the occipital bone posteriorly.
- A.
Falx cerebri
- B.
Tentorium cerebelli
- C.
Falx cerebelli
- D.
Diaphragma sellae
Correct Answer
B. Tentorium cerebelliExplanation
The correct answer is Tentorium cerebelli. The tentorium cerebelli is a dural partition that separates the cerebrum from the cerebellum transversally. It attaches onto the anterior and posterior clinoid processes of the sphenoid bone anteriorly and the occipital bone posteriorly.Rate this question:
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- 9.
The middle meningeal artery enters the cranial cavity via the foramen ...
Correct Answer
spinosumExplanation
The middle meningeal artery enters the cranial cavity via the foramen spinosum.Rate this question:
- 10.
The accessory meningeal artery enters the cranial cavity by passing through the foramen rotundum
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
the correct answer is the foramen ovaleRate this question:
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- 11.
Which foramen does the posterior meningeal artery pass through?
- A.
Formen spinosum
- B.
Foramen ovale
- C.
Foramen rotundum
- D.
Jugular foramen
Correct Answer
D. Jugular foramenExplanation
The correct answer is jugular foramen. The posterior meningeal artery passes through the jugular foramen.Rate this question:
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- 12.
Between which two meningeal layers does the subarachnoid space lie?
- A.
Dura mater
- B.
Pia mater
- C.
Arachnoid mater
Correct Answer(s)
B. Pia mater
C. Arachnoid materExplanation
The subarachnoid space lies between the pia mater and the arachnoid mater. The pia mater is the innermost layer of the meninges, directly covering the brain and spinal cord. The arachnoid mater is the middle layer, located between the pia mater and the dura mater. The subarachnoid space contains cerebrospinal fluid and is important for cushioning and protecting the brain and spinal cord.Rate this question:
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- 13.
The sub- arachnoid space contains?
- A.
Cerebrospinal fluid
- B.
Meningeal arteries
- C.
Dural sinuses
- D.
Arachnoid trabelculae
Correct Answer(s)
A. Cerebrospinal fluid
D. Arachnoid trabelculaeExplanation
The sub-arachnoid space contains cerebrospinal fluid, which is a clear, colorless fluid that surrounds and protects the brain and spinal cord. It also contains arachnoid trabeculae, which are delicate, web-like structures that provide support and stability to the brain and spinal cord.Rate this question:
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- 14.
Cerebrospinal fluid is secreted by the ... ...
Correct Answer(s)
choroid plexusExplanation
Cerebrospinal fluid is secreted by the choroid plexus. The choroid plexus is a network of blood vessels in the brain that produces cerebrospinal fluid. This fluid acts as a cushion, protecting the brain and spinal cord from injury. It also helps to remove waste products from the brain and regulate its chemical environment.Rate this question:
- 15.
How much cerebrospinal fluid is produced in a day?
- A.
500
- B.
450
- C.
400
- D.
350
Correct Answer
A. 500Explanation
Cerebrospinal fluid is produced in the ventricles of the brain and is essential for cushioning and protecting the brain and spinal cord. It also helps in removing waste products and delivering nutrients to the central nervous system. The correct answer, 500, suggests that 500 milliliters of cerebrospinal fluid is produced in a day.Rate this question:
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- 16.
How many ventricles are in the brain?
- A.
2
- B.
3
- C.
4
Correct Answer
C. 4Explanation
The correct answer is 4 because the brain has four ventricles. Ventricles are fluid-filled spaces in the brain that help circulate cerebrospinal fluid, which provides cushioning and nutrients to the brain. The four ventricles are called the lateral ventricles, the third ventricle, and the fourth ventricle. Each ventricle plays a crucial role in maintaining the overall function and health of the brain.Rate this question:
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- 17.
Cerebrospinal fluid flows from the lateral ventricles to the 3rd ventricle via the?
- A.
Cerebral aqueduct
- B.
Lateral aperture
- C.
Median aperture
- D.
Interventricular foramen
Correct Answer
D. Interventricular foramenExplanation
The interventricular foramen is the correct answer because it is the pathway through which cerebrospinal fluid flows from the lateral ventricles to the 3rd ventricle. The lateral ventricles are connected to the 3rd ventricle by the interventricular foramen, also known as the foramen of Monro. This opening allows the cerebrospinal fluid to pass through and circulate within the brain. The other options, such as the cerebral aqueduct, lateral aperture, and median aperture, are not involved in the specific flow of cerebrospinal fluid between these ventricles.Rate this question:
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- 18.
Cerebrospinal fuild enters the 4th ventricle via the?
- A.
Cerebral aqueduct
- B.
Lateral aperture
- C.
Median aperture
- D.
Interventricular foramen
Correct Answer
A. Cerebral aqueductExplanation
The correct answer is the cerebral aqueduct. The cerebral aqueduct is a narrow canal that connects the third and fourth ventricles in the brain. It allows for the flow of cerebrospinal fluid (CSF) from the third ventricle to the fourth ventricle. The CSF plays a crucial role in cushioning and protecting the brain and spinal cord.Rate this question:
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- 19.
Cerebrospinal fluid enters the sub-arachnoid space via what two structures?
- A.
Cerebral aperture
- B.
Lateral aperture
- C.
Median aperture
- D.
Interventricular foramen
Correct Answer(s)
B. Lateral aperture
C. Median apertureExplanation
Cerebrospinal fluid enters the sub-arachnoid space through two structures: the lateral aperture and the median aperture. These apertures are openings in the walls of the brain's ventricles, allowing the fluid to flow from the ventricles into the sub-arachnoid space.Rate this question:
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- 20.
The cerebrospinal fluid enters the venous system via the cerebral veins?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
CSF enters the venous system by passing through arachnoid ganulations which extend from the arachnoid mater to the dural sinuses.Rate this question:
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- 21.
Size and number of arachnoid granulations increases with age?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
As a person ages, the size and number of arachnoid granulations tend to increase. Arachnoid granulations are small protrusions found in the arachnoid mater, one of the membranes that surround the brain. These granulations play a role in the absorption of cerebrospinal fluid (CSF) from the brain into the bloodstream. With age, there is an accumulation of CSF in the brain, and the arachnoid granulations increase in size and number to facilitate the drainage of excess fluid. Therefore, the statement that the size and number of arachnoid granulations increases with age is true.Rate this question:
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- 22.
80 mm of water is a normal cerebrospinal fluid pressure?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The normal CSF range is 80- 180 mm of water.Rate this question:
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- 23.
Which of the following may cause on increase in intracranial pressure? You may pick more than one answer.
- A.
Tumour
- B.
Increase in blood following a haemorrhage
- C.
Increase in cerebrospinal fluid within ventricular system
Correct Answer(s)
A. Tumour
B. Increase in blood following a haemorrhage
C. Increase in cerebrospinal fluid within ventricular systemExplanation
Tumors can cause an increase in intracranial pressure by taking up space within the skull and compressing the brain. An increase in blood following a hemorrhage can also cause an increase in intracranial pressure due to the accumulation of blood within the skull. Similarly, an increase in cerebrospinal fluid within the ventricular system can lead to increased intracranial pressure as the fluid builds up and puts pressure on the brain.Rate this question:
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Mar 21, 2023Quiz Edited by
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Nov 28, 2011Quiz Created by
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