BPK 105 Study Guide - Midterm Guide: Special Senses, Sensory Neuron, Somatosensory System
27 Apr 2018
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Module 5 - Overview and Objectives - Part 1
Overview
- senses involve the detection of stimuli from the world around and within our bodies.
- general + special senses require receptors to detect those stimuli and convert the
signal into an electrical potential that can stimulate an action potential down an
axon.
- Once this signal reaches the CNS we can actually perceive, or become consciously
aware of the stimulus.
- specialization of receptors required for each of the different senses.
- general senses—touch, pressure, temperature, pain, and vibration—do not require very
elaborate structures to facilitate their detection.
- special senses—smell, taste, vision, hearing and equilibrium—however, have elaborate
anatomical support structures and complex means by which the stimulus is converted
into an electrical potential in the nervous system.
Objectives
After completing this module you will be able to:
● Define sensory perception.
Sensation is the process initiated by stimulating sensory receptors and perception is the
conscious awareness of those stimuli.
conscious awareness of stimuli that activate sensory receptors
● Distinguish between general and special senses.
general senses
- have receptors distributed over a large part of the body.
- divided into two groups: somatic senses + visceral senses.
-somatic senses provide sensory information about the body and the environment.
-visceral senses provide information about various internal organs, primarily involving
pain and pressure.
- touch, pressure, temperature, pain, and vibration
Special senses
- more specialized in structure and are localized to specific parts of the body.
- special senses are smell, taste, sight, hearing, and balance.
● Describe the five types of sensory receptors used by both the general and
special senses.
sensory receptors: nerve endings or cells that respond to stimuli by action potential
Document Summary
Module 5 - overview and objectives - part 1. After completing this module you will be able to: Sensation is the process initiated by stimulating sensory receptors and perception is the conscious awareness of those stimuli. conscious awareness of stimuli that activate sensory receptors. More specialized in structure and are localized to specific parts of the body. special senses are smell, taste, sight, hearing, and balance. Describe the five types of sensory receptors used by both the general and special senses. sensory receptors: nerve endings or cells that respond to stimuli by action potential. Mechanoreceptors r espond to mechanical stimuli, such as the bending or stretching of receptors. Chemoreceptors respond to chemicals, such as odor molecules. Nociceptors (to injure) respond to stimuli that result in the sensation of pain. Referred pain perceived to originate in a region of the body that is not the source of the pain stimulus.
