Cerebrospinal fluid is secreted by

Options

A. Cerebrum
B. Cerebellum
C. olfactory lobe
D. Choroid plexus

Answer

**Step-by-Step Solution:**

1. **Understanding Cerebrospinal Fluid (CSF)**:
- Cerebrospinal fluid is a clear and colorless fluid that surrounds the brain and spinal cord. It serves multiple functions, including acting as a cushion to protect the brain and spinal cord from injury, and it also helps in waste removal from the brain.

2. **Identifying the Source of CSF**:
- The question asks which structure secretes cerebrospinal fluid. The options provided are:
- A) Cerebrum
- B) Cerebellum
- C) Olfactory lobe
- D) Choroid plexus

3. **Evaluating Each Option**:
- **Cerebrum**: This part of the brain is responsible for functions like movement, touch, vision, hearing, learning, and emotions. It does not secrete CSF.
- **Cerebellum**: This area is involved in motor learning and coordination. It also does not secrete CSF.
- **Olfactory Lobe**: Located at the front of the cerebrum, it is primarily responsible for the sense of smell. It does not secrete CSF.
- **Choroid Plexus**: This is a network of blood vessels located in the ventricles of the brain. It is specifically responsible for the production and secretion of cerebrospinal fluid.

4. **Conclusion**:
- After evaluating all the options, the correct answer is **D) Choroid plexus**, as it is the structure that secretes cerebrospinal fluid.

**Final Answer**: Cerebrospinal fluid is secreted by the choroid plexus.

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