Eye
Where are the photoreceptors in the eye?
Retina
Where are the mechanoreceptors for hearing?
Cochlea of the inner ear
What is a pain receptor called?
nociceptor
Name one reflex in a baby.
Moro or startle reflex Sucking and rooting reflexes Stepping reflex Fencing reflex Curling toes when sole is touched
What is the term for hearing?
audio-
What cranial nerve serves the eye?
The optic nerve CN II
Where are the mechanoreceptors for balance?
In the semicircular canals
What are the names of the two skin layers in the skin?
Dermis and epidermis
What are reflexes for?
Survival and protection
What are 2 terms for skin?
dermato- cutaneo-
What is the job of the iris/pupil?
To control the amount of light entering the eye.
Where do ear infections (otitis media) most commonly happen?
Middle ear-come up from the throat through the eustachian tube.
Explain a first, second, third degree burn
First removes epidermis Second burns into the dermis Third burns through the dermis to the subcutaneous fat
Name three reflexes.
Knee jerk Ankle jerk Pupillary reflex Muscle spindle Golgi tendon
What are 3 terms for eye?
oculo- opto- ophthalmo-
What is the job of the lens?
To focus the image on the retina.
What is the pathway for balance?
Semicircular canal mechanoreceptor to vestibular nerve to acoustic (vestibulocochlear) nerve to thalamus a. to brain stem to cerebellum or b. to parietal lobe
What are four functions of the skin?
Protection from infection Temperature regulation Sensations Remove waste in sweat glands Synthesis of vitamin D
What type of tissue is usually the effector in a reflex arc?
Muscle Tissue
What is the term for eyelid?
blepharo-
What is the pathway of light?
Through cornea and pupil and lens to retina to optic nerve to optic chiasma to the thalamus to the occipital lobe.
What is the pathway for hearing?
Outer ear canal to tympanic membrane to malleus to incus to stapes to cochlea (Organ of Corti) to cochlear nerve to acoustic (vestibulocochlear) nerve to thalamus to temporal lobe.
What type of sensations are felt in the skin?
Light touch Deep pressure Pain Heat
What are the five parts of a reflex arc?
Receptor to sensory (afferent) neuron to interneuron to motor (efferent) neuron to effector.
What are the two terms for condition of vision?
Opia and opsia