31.4 The Senses Answer Key -

The greatest density of touch receptors is found on the fingers, not the arms or legs. Thermoreception: Temperature is monitored by the hypothalamus

Questions in this section often focus on the location of sensory receptors. Unlike photoreceptors, which are highly localized in the eyes, touch receptors are spread throughout the skin and skeletal muscles.

The first portion of the section—and usually the first set of questions on any worksheet—deals with the classification of sensory receptors. To master the , one must first define what a sensory receptor is: a specialized neuron that detects a specific stimulus. 31.4 the senses answer key

Before diving into the specific answers, let’s review the key vocabulary and processes from Section 31.4.

Cornea, pupil, iris, lens, retina, optic nerve, vitreous humor, sclera. The greatest density of touch receptors is found

Trace the path of sound through the ear. A: Pinna → ear canal → eardrum → hammer, anvil, stirrup (ossicles) → oval window → cochlea (fluid waves) → hair cells → auditory nerve → brain.

This article provides a summary of the core concepts and common review questions found in Section 31.4: The Senses Miller & Levine Biology The first portion of the section—and usually the

To master this section, start by categorizing the five main types of sensory receptors: Receptor Type Detect touch, pressure, and sound vibrations Skin, inner ear Chemoreceptors Detect chemical signals (smell and taste) Nose, taste buds Thermoreceptors Detect heat and cold Skin, hypothalamus Photoreceptors Detect light (rods and cones) Eyes (retina) Nociceptors Detect pain Most body tissues (except the brain) 1. Touch, Temperature, and Pain

Both use chemoreceptors. When you have a cold, food often tastes "bland" because your sense of smell is blocked, and smell accounts for much of what we perceive as "flavor".

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Sound enters the auditory canal , causing the tympanum (eardrum) to vibrate. These vibrations pass through three tiny bones—the hammer, anvil, and stirrup—into the fluid-filled cochlea . Inside the cochlea, tiny hair cells convert the vibrations into nerve impulses for the brain.