Sense organs Flashcards
Sense organs that monitor muscle contractions and joint movements are called _____________.
Proprioceptors
Of the two types of pain, which is transmitted by myelinated fibers?
Fast pain
All the organs that produce tears and drain them from the eye are collectively called the __________.
Lacrimal
The space between the cornea and lens of the eye is filled with fluid called ______________.
Aqueous humor
Rod cells are lacking from an area of the retina called the ___________, and cone cells are smallest and most closely spaced there.
Fovea centralis
Location where some optic nerve fibers from each eye cross over to the opposite side of the brain.
Optic chiasma
Receptor cells for daylight and color vision.
Cones
Endogenous peptide with powerful analgesic effects
Enkephalin
The ear is classified as a
Mechanoreceptor
The sensation of pain results partly from the stimulation of pain receptors by
Bradykinin
Enkephalin blocks the release of ___________ by afferent nerve endings in the spinal cord.
Substance P
The __________ admits air to the middle ear cavity to equalize pressure on both sides of the tympanic membrane.
Auditory tube
