Question

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Explanation:

1 (Endocrine Organ):

The pituitary gland is the endocrine organ that hangs down from the hypothalamus. The thalamus is a brain structure for sensory relay, the pineal gland is in the brain (not hanging from hypothalamus), and the corpus callosum connects brain hemispheres.

The organ of Corti is the receptor structure for hearing in the cochlea. The vestibule and semicircular canals are for balance, and the macula is for static equilibrium (not hearing).

Cranial Nerve IX (Glossopharyngeal) transmits sensory data from the posterior third of the tongue. CN VII (Facial) handles anterior tongue taste, CN V (Trigeminal) for facial sensation, CN XII (Hypoglossal) for tongue movement.

Answer:

C. Pituitary gland

Question 2 (Hearing Receptor):