Question 3: How does tetanus toxin typically reach the central nervous system? A. Directly through the bloodstream B. Retrograde axonal transport from the site of infection C. Via infection of cranial nerves in the brain D. By crossing the blood-brain barrier through active transport

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Question 3: How does tetanus toxin typically reach the central nervous system? A. Directly through the bloodstream B. Retrograde axonal transport from the site of infection C. Via infection of cranial nerves in the brain D. By crossing the blood-brain barrier through active transport

Answer 1

The correct answer is B. Retrograde axonal transport from the site of infection.Tetanus toxin is produced by the bacterium Clostridium tetani. When a person is infected with tetanus, the toxin typically enters the body through a wound or cut. The toxin then travels to the site of infection, where it binds to ganglionic neurons. From there, the toxin is transported retrograde along the axon to the central nervous system. This process is known as retrograde axonal transport.Once the toxin reaches the central nervous system, it interferes with the normal functioning of the nervous system, leading to the characteristic symptoms of tetanus, such as muscle stiffness and spasms.

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Question 3: How does tetanus toxin typically reach the central nervous system? A. Directly through the bloodstream B. Retrograde axonal transport from the site of infection C. Via infection of cranial nerves in the brain D. By crossing the blood-brain barrier through active transport

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