Neural Control And Coordination

Let's analyze each cranial nerve: - A. Vagus nerve (X) — Supplies thoracic and abdominal organs like lungs, heart, and oesophagus → (iii). - B. Optic nerve (II) — Carries visual information from the retina → (iv). - C. Hypoglossal nerve (XII) — Controls the muscles of the tongue → (ii). - D. Facial nerve (VII) — Controls facial muscles and also affects salivary glands and palate → (i). Thus, the correct matching is:

- Statement I: Correct — Synaptic transmission is unidirectional: presynaptic → postsynaptic.
- Statement II: Incorrect — Receptors are on postsynaptic membrane, not presynaptic.

- Schwann cells: Form myelin sheath and neurilemma in peripheral nervous system.
- Oligodendrocytes: Myelinate neurons in CNS — do not form neurilemma.
- Ependymal cells: Line brain ventricles, not involved in sheath.
- Microglial cells: Immune cells in CNS.