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What is the function of the blood-brain barrier? (2022)

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Question: What is the function of the blood-brain barrier? (2022)

Options:

  1. To allow all substances to enter the brain
  2. To protect the brain from harmful substances
  3. To facilitate neurotransmitter release
  4. To enhance nerve impulse conduction

Correct Answer: To protect the brain from harmful substances

Exam Year: 2022

Solution: 

The blood-brain barrier protects the brain from harmful substances while allowing essential nutrients to pass through.

What is the function of the blood-brain barrier? (2022)

Practice Questions

Q1
What is the function of the blood-brain barrier? (2022)
  1. To allow all substances to enter the brain
  2. To protect the brain from harmful substances
  3. To facilitate neurotransmitter release
  4. To enhance nerve impulse conduction

Questions & Step-by-Step Solutions

What is the function of the blood-brain barrier? (2022)
  • Step 1: Understand that the brain is a vital organ that needs protection.
  • Step 2: Learn that the blood-brain barrier is a special barrier that surrounds the brain.
  • Step 3: Know that this barrier keeps harmful substances, like toxins and germs, from entering the brain.
  • Step 4: Realize that the blood-brain barrier also allows important nutrients, like glucose and oxygen, to pass through to the brain.
  • Step 5: Conclude that the blood-brain barrier helps keep the brain safe while still providing it with what it needs to function.
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