Quiz 1: Special Sensory Organs Flashcards
1
Q
Auricle
A
- Skin elastic cartilage
- Collects sound and directs it to external acoustic meats
2
Q
External acoustic meatus
A
- Bony cartilaginous canal that runs from the auricle to the tympanic membrane
- Transmits sound to the tympanic membrane and produces ear wax to prevent foreign particles from entering the middle and inner ear
3
Q
Tympanic Membrane (eardrum)
A
- An oval and semitransparent membrane that moves in response to air vibrations
- It transmits these vibrations to the ossicles via the malleus bone
4
Q
Auditory Ossicles
A
- The three smallest bones in the body called the malleus, incus, and stapes
- Articulate with each other via synovial joints and transmit vibrations from tympanic membrane to the oval window
5
Q
Oval Window
A
- Membrane covering the entrance to the inner ear
6
Q
Auditory Tube
A
- Connects the middle ear with the nasopharyngeal
- Equalizes pressure on both sides of the tympanic membrane, preventing rupture under high pressures
7
Q
Cochlea
A
- Snail/spiral shaped organ that contains fluid and hair cells
- Displacement of the hair cells due to vibrations/pressure from the middle ear transmits impulses to the brain
8
Q
Otolith Organs (Utricle and Saccule)
A
Detective linear acceleration and changes in head position
9
Q
Semicircular canals
A
- Detect rotation accelerations to head position
10
Q
Cornea
A
- Outer part of eye
- Clear, dome shaped outer layer of the eye that covers the rest of the structures
- Transmits and focuses light
11
Q
Iris
A
- Pigmented diaphragm with a central opening (pupil)
- Contains smooth muscle that alters size of pupil to regular amount of light entering eye
12
Q
Lens
A
- An ellipsoid structure located posterior to the iris
- Transmits and focuses light onto the retina
- Adjusts the focus of the eyes on different distances in a process called ACCOMODATION
13
Q
Cilliary Body
A
Contains smooth muscle that alters the shape of the lens to allow for accomodation
14
Q
Retina
A
- Highly vascularized and innervated back wall of the eye located opposite the pupil and lens
- Converts light that enters into your eye into electrical signals your optic nerve sends to your brain which creates images you see