Nervous System
This division consists of the brain and spinal cord.
What is the central nervous system (CNS)?
This lobe is primarily responsible for vision and visual interpretation.
What is the occipital lobe?
The decreased response to a constant stimulus, such as no longer noticing a scent, is called this.
What is adaptation?
This transparent, flexible eye structure focuses light onto the retina.
What is the lens?
This regulatory process reverses a change and returns a body condition toward its normal range.
What is negative feedback?
These cells support, protect, and nourish neurons.
What are neuroglia, or glial cells?
This cranial nerve carries sensory information for vision.
What is the optic nerve (cranial nerve II)?
The strength of a sensation is largely determined by this feature of nerve impulses.
What is the frequency of the nerve impulses?
These photoreceptors provide vision in dim light.
What are rods?
These thyroid hormones increase the body’s metabolic rate.
What are triiodothyronine (T3) and thyroxine (T4)?
This insulating covering increases the speed of impulse transmission along an axon.
What is the myelin sheath?
This cranial nerve controls most eye movements and pupil constriction.
What is the oculomotor nerve (cranial nerve III)?
Taste and smell are grouped together as this type of sense because both detect chemicals.
What are chemical senses?
The malleus, incus, and stapes are collectively called these.
What are the ossicles?
This pancreatic hormone lowers blood glucose by promoting glucose uptake into cells.
What is insulin?
A sensory pathway carrying information toward the CNS is described by this term.
What is afferent?
A patient has difficulty swallowing and impaired autonomic control. This longest cranial nerve may be affected.
What is the vagus nerve (cranial nerve X)?
Pain felt in a location different from its actual source is called this.
What is referred pain?
These inner-ear structures detect rotational or angular head movement.
What are the semicircular canals?
Damage to the posterior pituitary can reduce the release of this water-conserving hormone.
What is antidiuretic hormone (ADH)?
A patient touches a hot pan and pulls the hand away before consciously feeling pain. This rapid response is this process.
What is a flexor, or withdrawal, reflex?
A patient has right-sided weakness and difficulty producing speech. This cerebral lobe is most likely affected.
What is the left frontal lobe?
A sensation that persists briefly after the stimulus has been removed is called this.
What is an after-image?
Hearing and balance signals travel to the brain through this cranial nerve.
What is the vestibulocochlear nerve (cranial nerve VIII)?
What is cortisol?