13 Questions
What is the definition of sensation?
Conscious awareness of stimuli received by sensory neurons
Name a type of touch receptor that detects light touch and pressure.
Merkel's disk
Which type of receptor is deep in the epidermis and localizes tactile sensations?
Meissner corpuscle
What is the function of Pacinian corpuscles?
Detect deep pressure, vibration, position
Define nociceptors.
Receptors that detect pain
What is the definition of pain?
An unpleasant perceptual and emotional experience
Which type of touch receptor is deep and associated with tendons and joints?
Pacinian corpuscle
What type of receptor is associated with detecting chemicals like odors?
Chemoreceptors
Where are Ruffini corpuscles located and what do they detect?
Deep tactile receptors, detecting continuous pressure in skin
Which type of receptor is responsible for detecting temperature changes?
Thermoreceptors
What is the function of Merkel's disk touch receptors?
Detect light touch and pressure
Which type of receptor detects movement such as touch, pressure, and vibration?
Mechanoreceptors
What is the specific function of hair follicle receptors in touch perception?
Detect light touch.
Study Notes
Senses and Sensation
- Sense refers to the ability to perceive stimuli
- Sensation refers to the conscious awareness of stimuli received by sensory neurons
- Sensory receptors are sensory nerve endings that respond to stimuli by developing action potentials
Classification of Senses
- General senses: receptors over a large part of the body that sense touch, pressure, pain, temperature, and itch
- Somatic receptors provide information about the body and environment
- Visceral receptors provide information about internal organs
- Special senses: smell, taste, sight, hearing, and balance
Types of Touch Receptors
- Merkel's disk: detects light touch and pressure
- Hair follicle receptors: detect light touch
- Meissner corpuscle: deep in epidermis, localizes tactile sensations
- Ruffini corpuscle: deep tactile receptors, detects continuous pressure in skin
- Pacinian corpuscle: deepest receptors, associated with tendons and joints, detects deep pressure, vibration, and position
Types of Receptors
- Mechanoreceptors: detect movement (e.g. touch, pressure, vibration)
- Chemoreceptors: detect chemicals (e.g. odors)
- Photoreceptors: detect light
- Thermoreceptors: detect temperature changes
- Nociceptors: detect pain
Pain
- An unpleasant perceptual and emotional experience
- Can be localized or diffuse
Prepare for your Anatomy and Physiology finals with this review of Chapter 9 focusing on the senses. Learn about sensory receptors and the classification of touch receptors such as Merkel's disk, hair follicle receptors, Meissner corpuscle, and Ruffini corpuscle.
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