Chapter 10 Flashcards
Name two types of temp receptors and describe
Warm receptors- most sensitive to temp above 77 and unresponsive above 113
Cold receptors- most sensitive to temp between 50-68
What’s the difference between meissners corpuscles and pacinian corpuscles
Meissners- receptors for light touch
Pacinian- receptors for heavy pressure
Only part that can’t feel pain?
Brain
Only receptor that provides sensation
Pain receptors are only receptors in viscera that provide sensation
When visceral pain feels as if it is coming from some part of body other than part being stimulated
Referred pain
Why does referred pain occur
Sensory impulses from skin and viscera travel on common nerve pathways
What are the two pain nerve fibers and how are they different
Acute pain fibers- conduct impulses rapidly, associated w sharp pain, and sensed as coming only from skin
Chronic pain fibers- conduct impulses slowly, produce a dull, aching pain, and is felt in deeper tissues
What makes a person aware of pain
When pain impulses reach thalamus
What is the function of enkephalins and endorphins
Released in response to extreme pain and provide natural pain control
Explain what happens to odor molecules before we smell them
Odor molecules enter nose as gases but must dissolve in watery fluids that surround the cilia
3 places taste buds are located
Surface of tongue, roof of mouth, and walls of throat
Name primary sensations
Sweet, sour, salty, bitter
Outer, funnel-like structure
Auricle
Function of auricle
Helps collect sound waves and directs them into auditory canal
Eardrum
Tympanic membrane
3 tiny bones which transmit vibrations to inner ear
Ossicles
Opening in the wall of the tympanic cavity which leads to inner ear
Oval window
Function of the auditory tube
Eustachian tube connects middle ear to throat and helps maintain air pressure on both sides of ear drum
Complex system of chambers and tubes composed of bony and membrane labyrinth
Labyrinth
3 canals that provide us with a sense of equilibrium
Semicircular canals
Spiral shaped canal which functions in hearing
Cochlea
Bony chamber located between semicircular canals and cochlea
Vestibule
Contains the hearing receptors stimulated by vibrations in the fluids of inner ear
Organ of corti
Nature of sound
Air at sea level, temp 77, sound travels 775 mph.
Speed of sound is much slower than speed of light
State the 3 characteristics of sound
Loudness
Pitch
Quality
What’s the difference between static and dynamic equilibrium
Static- maintains stability of head and body when motionless
Dynamic- maintains stability when in motion
What does smell and taste adaptation mean
Smell or taste is really strong at first, but you get used to it
