Chapter 33.3, Problem 3MI

Summary Introduction

To define:

The given terms.

Introduction:

The basic working unit found in the brain is the neuron. Neuron is the specialized cell that helps in the transmission of sensory information. These cells transport information to muscle, nerve cells, and glands.

Explanation of Solution

Taste buds − They are found on the tongue. Taste buds contain microscopic hairs known as microvilli. These microvilli send message to the brain about the taste of food.

Lens − It is the transparent and biconvex structure found in the eyes. Along with the cornea, it helps in the refraction of light that focuses on the retina.

Retina − It is the thin layer of tissue found at the back of the eyes from inside. It receives light being focused by the lens, and then converts it into neural signals.

Rods − These are photoreceptor cells found in the retina. These cells are sensitive to light and give good vision in dim light.

Cones − These are photoreceptor cells found in the retina. They respond to the light depending on its wavelength.

Cochlea − It is found in the inner ear. In the form of vibrations, cochlea receives sound, leading to stereocilia to move. Then, stereocilia converts these vibrations to nerve impulse.

Semicircular canals- These are three semicircular and interconnected tubes found in the inner ear. They function to keep the body in balance and coordination.