View
215
Download
0
Tags:
Embed Size (px)
Citation preview
Sensory receptors Rely on the transfer of matter and energy
Molecular transfer Chemical receptors
Energy transfer
Conduction – The transfer of heat (kinetic energy) by physical contact between molecules. Includes mechanical waves and pressure waves
Convection – The transfer of kinetic energy by moving groups of molecules from one area to another
Radiation- The transfer of energy via electromagnetic waves. These include visible light, x-rays, UV- light.
Sensory: smell
Smell Receptor Types: Ethereal
Floral Camphoraceous
Peppermint Putrid (rotten)
Musk (Animal or sweat) Pungent
Hair Cells
Mechanosensory Directionally sensitive Fabulously sensitive –
Can respond tosub-nanometer displacement!
synapticvesicles
Proprioceptors
Body position, motion
Muscle contraction
Tendon stretch
Ligament movement
What type of receptor?
This receptor detects what kind of energy transfer?
Proprioceptors are located within muscles, tendons, and joints.
TOUCH AND RELATED SENSES 1. All Regions of our bodies are sensitive to TOUCH. 2. YOUR LARGEST SENSE ORGAN IS YOUR SKIN. 3. MECHANORECEPTORS located throughout the Skin make it possible to sense touch, pressure, and tension. 4. In humans, the receptors for touch are concentrated in the face, tongue, and fingertips. 5. Body hair also plays an important role in the ability to sense touch. Large numbers of Mechanoreceptors are found in the skin at the base of hair follicles. 6. Our Skin has several different types of Sensory Receptors that are just below the surface of the Skin. 7. Two Types respond to Heat or Cold - THERMORECEPTORS; Two others respond to TOUCH - MECHANORECEPTORS; one Type responds to TISSUE DAMAGE WHICH CAUSES PAIN - PAIN RECEPTORS. 8. Sensory receptors for Hot or Cold are scattered directly below the surface of the skin. There are THREE to FOUR WARM Receptors for every COLD Receptor. 9. Sensory Receptor can be more concentrated in different places of our bodies. 10. The MOST TOUCH-Sensitive areas are the FINGERS, TOES, AND LIPS. 11. Pain Receptors are located throughout the skin. The Sensation of Pain can be experienced as either Prickling Pain (FAST PAIN) or Burning and Aching Pain (SLOW PAIN). Pain receptors are Stimulated by mechanical, thermal, electrical, or chemical Energy.
Sense Energetic transfer used
Sight Radiation -- electromagnetic waves
Hearing Conduction – mechanical (sound) waves
Taste Convection – movement of molecules via bulk flow
Smell Convection – movement of molecules via diffusion and bulk flow
Touch/heat All Three!
Touch Receptor types
Touch receptor type What it senses
Pain receptorsIntense pressure or heat – imminent or actual tissue damage
Thermoreceptors Heat
MechanoreceptorsPressure, vibration, Body position
Receptor type Senses Using Them
Pain Receptors Touch
Thermoreceptor Touch
Mechanoreceptors Touch, Hearing
Chemoreceptors Taste, Smell
Electromagnetic receptors Sight
What you should be able to do: Identify which energetic process is responsible for transmitting
information to each sense organ. Explain how the property of sensation derives from a pattern of
responses from cells that sense different stimuli (Colors from 3 types of cones, taste from 4-5 types of receptors, etc.).
Explain how receptor specificity for chemoreception works. Explain the importance of sensory information to survival. Identify the location of sensory cells for each sense (Taste bud,
nasal passages, skin). Identify which senses detect energy patterns and which detect
patterns in matter.