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Central Nervous System and Brain Protection

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Central Nervous System and Brain Protection

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Questions and Answers

Which of the following is true about the blood-brain barrier?

It is impermeable to water-soluble substances such as glucose and amino acids (correct)

It allows free movement of all substances between the blood and brain

It primarily protects the brain from lipid-soluble substances

It is less permeable to oxygen and carbon dioxide

What are the three continuous sheets of connective tissue covering the spinal cord and brain known as?

Dura mater, arachnoid, pia mater (correct)

Brain shield, nerve sheath, cortex cover

Neuroprotective layers, CNS barriers, CSF membranes

Cerebrospinal, meninges, BBB

What is the function of cerebrospinal fluid (CSF) in the brain?

Creates a barrier against lipid-soluble substances

Provides nutrients directly to the brain cells

Acts as a cushion and reduces injury to the brain (correct)

Helps in the transmission of electrical signals within the brain

How does the presence of cerebrospinal fluid (CSF) reduce pressure at the base of the brain?

<p>Brain floats in CSF, therefore reducing pressure at the base of the brain (D)</p> Signup and view all the answers

What role do meninges play in protecting the brain?

<p>Covering and protecting the brain with tough layers (C)</p> Signup and view all the answers

Study Notes

Blood-Brain Barrier

The blood-brain barrier is a specialized barrier that separates the brain from the bloodstream, restricting the passage of certain substances.

Meninges

The three continuous sheets of connective tissue covering the spinal cord and brain are known as meninges.
Meninges play a crucial role in protecting the brain by acting as a physical barrier against injury and infection.

Cerebrospinal Fluid (CSF)

Cerebrospinal fluid (CSF) is a clear, colorless liquid that circulates in the space between the meninges and the brain, and in the ventricles of the brain.
The function of CSF is to cushion and support the brain, acting as a shock absorber, and to remove waste products from the brain.
The presence of CSF reduces pressure at the base of the brain by acting as a buoyant force, allowing the brain to float in the CSF, and thereby reducing the weight of the brain on the base of the skull.

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Description

Test your knowledge about the central nervous system (CNS) and the protection of the brain including the meninges and cerebrospinal fluid. Learn about the anatomy and functions of the brain and spinal cord.