The brain and spinal cord make up the __________ nervous system.
What is central nervous system?
100
Neurons that conduct impulses to the spinal cord and brain.
What afferent neurons?
100
This sensory receptors responds to movement.
What is mechanoreceptor?
100
The blind spot.
What is the optic disk?
100
gloss
What is tongue?
200
The fiber of a neuron that carries impulses toward the cell body.
What are dendrites?
200
The cranial nerve concerned with the sense of smell is the
What is olfactory nerve?
200
The following receptor cells helps the retina function in dim light.
What are rods?
200
The receptor cell responsible for sharp images.
What are cones?
200
Fluid that circulates in the brain and spinal fluid?
What is CSF?
300
Neuron fibers that conduct impulses away from the cell body.
What are axon?
300
The eye’s receptor layer, containing rods and cones.
What is the retina?
300
The anatomic name for the external part of the ear.
What is pinna?
300
Watery fluid that fills most of the eyeball anterior to the lens.
What is aqeous humor?
300
This connects the middle ear cavity with the throat, allows pressure to equalize on both sides of the tympanic membrane, and is a continuous mucous membrane from the pharynx to the middle ear cavity.
What is the eustachian tube?
400
Nerve impulse conduction is faster in axons coated with this.
What is a myelin sheath?
400
The oculomotor nerve controls movement of this.
What is the eye?
400
The cranial nerve that supplies motor impulses to the tongue is the
What is hypoglossal.
400
The part of the brainstem that contains relay centers for the eye and ear reflexes is the
What is the midbrain?
400
The ossicles of the ear.
What are malleus, incus, stapes
500
Chemicals that transmit a signal across a synapse.
What is neurotransmitter?
500
This division of the nervous system is controlled voluntarily and all its effectors are skeletal muscles.
What is somatic nervous system?
500
Vital centers that regulate respiration and the heart are located in this part of the brain.
What is the medulla oblongata?
500
This part of the brain functions to maintain muscle tone and balance and coordinating voluntary muscles.
What is the cerebellum?
500
This part of the ear directs sound waves into the ear, contains ceruminous glands and vibrates as sound waves enter the ear.