Question

All sensory signals except _____ travel to the _____ in the brain before the cerebral cortex. a. vision; thalamus b. olfaction; thalamus c. vision; cranial nerves d. olfaction; cranial nerves

Short answer

Option b is correct.

Step-by-step solution

Step 1. Introduction

Sensory signals are transmitted through sensory neurons which include receptors cells. Sensory signals are those for vision, balance, hearing, touch, taste, and smell.

Step 2. Explanation for the correct option

Option b is correct because the thalamus regulates sleep, alertness, and wakefullness. All sensory signals except for olfactory travel to the central nervous system and then routed to the thalamus and then the final processing region of the brain.

Step 3. Explanation for the incorrect option

Option a is incorrect because sensory signals for vision travel to the thalamus before reaching the cerebral cortex.

Option c is incorrect because all sensory signals except olfaction are routed to the thalamus before the cerebral cortex.

Option d is incorrect because all sensory signals except olfaction are routed to the thalamus before the cerebral cortex.