{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

The Sense2 - Axons of the olfactory neurons form the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
The Senses Sensations result only from those stimuli that reach the cerebral cortex and are consciously perceived. Senses can be defined as special or general. General Senses Receptors for general senses, such as pain, temperature, touch, pressure, and proprioception, are scattered throughout the body. Pain o Pain is an unpleasant sensation with a fast component and a slow component. o Pain can be "gated," referred, or phantom. Special Senses Smell and taste respond to chemical stimulation, vision to light stimulation, and hearing and balance to mechanical stimulation. Olfaction Olfactory neurons have enlarged distal ends with long cilia. The cilia have receptors that respond to dissolved substances in the nasal mucus.
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Axons of the olfactory neurons form the olfactory nerves, which enter the olfactory bulb. Olfactory tracts carry action potentials from the olfactory bulbs to the olfactory cortex of the brain. • The wide range of detectable odors may result from combinations of receptor responses stimulated by only a few primary odors. Taste • Taste buds contain taste cells with hairs that extend into pores. Receptors on the hairs detect dissolved substances. • There are four basic types of taste: sour, salty, bitter, and sweet. • The facial nerves carry taste from the anterior two-thirds of the tongue, the glossopharyngeal from the posterior one-third of the tongue, and the vagus from the root of the tongue....
View Full Document

{[ snackBarMessage ]}