Upgrade to remove ads
Special Senses: Receptors
Terms in this set (23)
Any structure that is specialized to detect a stimulus. Some are simple nerve endings, like dendrites, others are sense organs; nerve endings combined with connective, epithelial, or muscular tissues that enhance or moderate the response to a stimulus.
Respond to physical deformation of tissue (ie. vibration, touch, pressure, stretch, tension). They include the organs of hearing and balance.
Respond to temperature changes
Respond to changes in light, found in the eye
Respond to chemical changes, including odors, tastes, and composition of body fluid.
Respond to sensations of pain from tissue damage to to trauma (cuts, blows), ischemia (poor blood flow), or excessive stimulation to agents such as heat and chemicals
Respond to stimuli arising outside the body. Sensitive to touch, pressure, pain, and temperature. Includes the special sense organs (eyes, ears, nose)
Respond to stimuli arising within the body. Sensitive to chemical changes, stretch, and temperature changes inside the body (bladder pressure, nausea, internal pain, etc)
Sensory neurons that monitor position and movement of body parts. Respond to degree of stretch of the organs they occupy. Monitor how much organs containing these receptors are stretched. Include muscles, tendons, and joint capsules. They can determine how much force is being applied to your limbs allowing you to pick something up without crushing it or dropping it.
Most receptors are simple in structure and include encapsulated and unencapsulated varieties. Example: Sensory neurons
Special sense organs like the eye, ear, and nose.
Simple receptors with free dendritic nerve endings. Examples: Merkel discs, Root hair plexuses, and Itch Receptors
Simple receptors. Consist of one or more fiber terminals of sensory neurons enclosed in a connective tissue capsule. Virtually all are mechanoreceptors. Examples: Meissner's corpuscles, Pacinian corpuscles, Ruffini's corpuscles, Muscle spindles, Golgi tendon organs, Joint kinesthetic receptors
A type of simple encapsulated receptor. Location types: Fusiform (spindle shaped) propriceptors Stimulation types: Mechanoreceptors (muscle stretch) Found within skeletal muscles, particularly those of the extremities.
Golgi tendon organs
A type of simple encapsulated receptor. Location types: Proprioceptors. Stimulation type: Mechanoreceptors (tendon stretch) Located in tendons, close to the skeletal muscle insertion
Joint kinesthetic receptors
A type of simple encapsulated receptor. Location types: Proprioceptors that monitor stretch in the articular capsules the enclose synovial joints. Stimulation type: Mechanoreceptors and nociceptors. Found in joint capsules and synovlia joints.
Free dendritic nerve endings of sensory neurons
Unencapsulated. Location types: exteroceptors, interoceptors, and proprioceptors. Stimulation types: Nociceptors (pain), thermorecptors (heat and cold), possible mechanoreceptors (pressure). Found in most body tissues; most dense in connective tissues (ligaments, tendons, dermis, joint capsules, periostea) and epithelia (epidermis, cornea, mucosae, and glands)
Modified free dendritic endings: Merkel discs
Unencapsulated. Location types: exteroceptors Stimulation types: Mechanoreceptors (light pressure); slowly adapting. Found in the basal layer of epidermis of skin
Root hair plexuses
Unencapsulated. Location types: exteroceptors Stimulation types: Mechanoreceptors (hair deflection); rapidly adapting. Found in and surrounding hair follicles.
Encapsulated. Location types: exteroceptors Stimulation types: Mechanoreceptors (light pressure, discriminative touch, vibration of low frequency). Found in the dermal papillae of hairless skin, particularly nipples, external genitalia, fingertips, soles of feet, eyelids
krause's end bulbs
Encapsulated. Location types: exteroceptors Stimulation types: Mechanoreceptors (probably modified Meissner's corpuscles). Found in the connective tissue of mucosae (mouth, conjuctive of eye) and of hairless skin near body openings (lips).
Encapsulated. Location types: exteroceptors, interoceptors, and some proprioceptors. Stimulation types: Mechanoreceptors (deep pressure, stretch, vibration of high frequency); rapidly adapting. Found in subcutaneous tissue of the skin; periostea, mesentery tendons, ligaments, joint capsules, most abundant on fingers, soles of feet, external genitalia, and nipples.
Encapsulated. Location types: exteroceptors and proprioceptors. Stimulation types: Mechanoreceptors (deep pressure and stretch); slowly adapting. Deep in dermis, hypodermis, and joint capsules.
THIS SET IS OFTEN IN FOLDERS WITH...
The Action Potential
Endocrine Exam 1
YOU MIGHT ALSO LIKE...
Special Senses: Receptors, Ex: 22 Genera…
A & P II - Chapter 13.1
A&PII: Lab Table 22.1
OTHER SETS BY THIS CREATOR
Special Sense: Ear and Hearing
Special Sense: Eye and vision
Special Sense: Sense