What is the role of dendrites in case of motor neurons?

Correct Answer: B

Rationale: Dendrites in motor neurons receive signals from other neurons, forming synapses (B) to integrate incoming information. They do not act as sensory organs (A) or receptors (C)—those roles belong to sensory neurons. 'None of the above' (D) is incorrect as dendrites have a clear synaptic role.

Correct Answer: A

Rationale: Medullary postural reflexes include tonic labyrinthine (B) and neck reflexes (C, D), adjusting posture via vestibular input. The optical righting reflex (A) is a midbrain/cortical reflex using visual cues, not medullary. A is the exception.

Correct Answer: B

Rationale: The spinothalamic tract carries pain and temperature (B, correct), not pressure (A, dorsal columns). It terminates in the thalamus (C, also true), but tuning fork tests vibration (D, dorsal columns). B is most specific.

Correct Answer: B

Rationale: The primary sensory cortex (B) localizes sensation via somatotopic mapping. Stimulus (A) and receptors (C) initiate it, and medullary centers (D) relay, but localization is cortical. B is correct.

Correct Answer: A

Rationale: Hopping reaction is midbrain (A, correct), tonic neck is medullary/spinal (not just spinal, B), optical righting is cortical (C, true but less specific), stretch reflex is spinal (not medulla, D). A is correct.