Why Can an Infection in the Brain's Ventricles Usually Be

question 18

Multiple Choice

Why can an infection in the brain's ventricles usually be detected in spinal fluid obtained from the lower back (lumbar region) ?

• A) Cerebrospinal fluid (CSF) originates in the ventricles, but percolates over and around the brain and spinal cord.
• B) There is a high degree of vascularity that exists, allowing easy transfer of bacteria in the cerebrospinal fluid (CSF) and the blood.
• C) There is a set of lymph nodes specifically in place to drain the cerebrospinal fluid (CSF) from the ventricles. They are found in the lumbar region of the spinal column.
• D) This is an incorrect statement. Since the central nervous system (CNS) is a protected site due to the blood-brain barrier, there can never BE an infection in the ventricles.
• E) When ventricles are infected, the brain reacts by pumping the causative pathogens into the CFS so that they can be removed by the immune system.

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Definitions:

Temperate Lakes

Freshwater lakes found in regions with moderate climates, often characterized by distinct seasonal temperature variations.

Epilimnion

The upper layer of water in a stratified lake, characterized by warmer temperatures and high levels of dissolved oxygen.

Hypolimnion

The lower layer of water in a stratified lake, characterized by being cold and typically oxygen-deficient, lying below the thermocline and epilimnion.

Surface Layer

The topmost layer of soil or material that covers the surface of an area, often subject to the most direct environmental interactions.