Nociceptors respond to?

The true source of pain can be difficult to
identify because:

Which inner ear structure contains the structures for hearing?

The outermost layer of the eye is the?

The bending of light rays so they focus precisely on the retina is called?

The sense of taste is called?

Which condition would cause a sensorineural hearing loss?

Rods are?

What condition results when the rate of absorption of aqueous humor through the canal of Schlemm is less than its production?

Which is a normal function of tears?

White, opaque, outermost layer of the eye

Transparent tissue lying over the iris that admits light into the eye

Ring of colored muscle that adjusts the diameter of the pupil

Thickened tissue that forms a collar around the lens and secretes aqueous humor

Thin layer of light-sensitive cells

Area producing the sharpest vision

Point where nerve fibers leave the retina

Patch of cells at the center of the retina

Where are photoreceptors (rods and cones) located?

The outer layer of the eye consists of what two tissues?

"fight or flight"

➫ prepares body for physical activity

➫ increases heart rate, blood glucose, & blood pressure

➫activates during high stress, fear, anger

"fee and breed"

➫ calming effect on the body

➫ important in digestion & reproduction

➫ calms heart rate but has no effect on blood pressure

➫ widen bronchial passages

➫ decrease movement of the large intestine

➫ constrict blood vessels

➫ activates goose bumps

➫ muscle relaxation

➫ increase stomach movement

➫ saliva production increases

this neurotransmitter carries messages from your brain to your body through nerve cells. it broken down very quickly so the PN is short lived

is released by postganglionic neurons of the sympathetic nervous system which binds to and activates the adrenergic receptors

constricts the blood vessels which leads to increased blood pressure. It also decreases swelling that allows muscles around the airways to relax (allowing the lungs to open)

➫ stimulates the skeletal muscle

➫ consists of one nerve fiber leading from CNS to target (no ganglia)

➫ has an excitatory effect on target cells

➫ operates under voluntary control

These receptors are activated by a change in temperature

These receptors react to various chemicals. This includes odors and tastes, as well as the concentration of various chemicals in the body (such as glucose or carbon dioxide).

These receptors respond to factors that change the position of a receptor, such as pressure, stretch, or vibration

These are pain receptors that respond to tissue damage from trauma, heat, chemicals, pressure, or a lack of oxygen.

Found only in the eyes, these receptors respond to light.

the visual receptors of the retina are composed of?

Fibers that secrete acetylcholine are called

Fibers that secrete NE (sometimes called noradrenaline) are called

➫ known as "visceral reflex"

➫ acts autonomously without awareness

➫ helps maintain homeostasis

➫ control BP, body temp, blood glucose, digestion

(basically, things we don't have to think about to regulate the body)

➫ a conscious awareness of incoming sensory info

➫ starts with a stimulus (a change in an environment)

➫ perception or awareness of the position and movement of the body

➫ allows us to understand our sense of position or orientation

➫ allows maintenance of posture and coordination of body movement

➫ first sensation to develop in the fetus

➫ is essential for growth and development

➫ adjusts to their environment in order to improve chances of survival

➫ When a stimulus is continuous, the firing frequency of the nerve begins to slow

➫ keeps our senses from being "overwhelmed"

➫ is only maintained by the sympathetic NS ; causing vessels to be slightly constricted

➫ pertains to blood vessels

➫ BP is maintained by constriction and dilation of BV

➫ sends impulses via the autonomic nervous system to alter blood vessel diameter and, therefore, blood pressure

cerumen is ear wax; waterproofs the ear canal

➫ is a neurotransmitter and hormone

➫ plays apart of "fight or flight"

➫ used to increase & maintain BP in limited short-term serious health situations

➫ stimulates the adrenal gland to start pumping into the bloodstream

➫ known as adrenaline rush or the fight or flight response

➫ sensation of smell

➫ results from detection of odors

TRUE OR FALSE??

visual receptors cannot undergo adaption?

located in the epithelia that covers the roof of the nasal cavity; superior nasal conchae and superior nasal septum

which vitamin is important to good eye health?

➫ is a genetic disorder

➫ one type of cone is not functioning

➫ men are more than likely to have this

➫ contains sclera and cornea

➫ thick, fibrous, tough, outlayer

➫ white of eye contain blood vessels and nerves

➫ helps maintain shape of the eye

➫ contains choroid, ciliary body, & iris

➫ supplies blood, O2, & nutrients to retina

➫ this layer has a dark blue pigment to absorb excess light

➫ contains retina, optic nerve, & blood vessels

➫ tear-shaped gland

➫secretes the aqueous portion of the tear film

➫ located in the upper, outer corner of the eye within the orbit

➫ provides nutrients to your eye

➫ helps eye keep its shape

➫ sticks to your retina at the back of your eye & allows light in

is the part of your eye that communicates with your brain so that you can see

➫ flows in and out of the front of your eye

➫ keep proper ocular pressure (eye pressure)

➫ maintained by having the same amount of fluid come in as the amount of fluid leaving the front of your eye

➫ ear drum

➫ separates the outer ear from the middle ear

➫ when sound reaches this part; it vibrates that is then transferred to the tiny bones in the middle ear

a narrow tube that connects the middle ear to the back of the nose

Where is the sense of sight located in the brain?

muscles control the movement of the eyes

eye muscle focus the eye, & control the iris to allow a specific amount of light to enter it

an organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to a sensory nerve

1. a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

1. the transparent layer forming the front of the eye.

a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center.

1. the raised disk on the retina at the point of entry of the optic nerve, lacking visual receptors and so creating a blind spot.

Boarder between middle ear and inner ear?

What are the receptors for hearing?

What is responsible for balance and equilibrium?

The ANS is controlled by?

True or false: Vitreous Humor is made continuosly and reabsorbed

What layer of the eye delivers blood to the sclera?

Color blindness is a deficiency in what?

What is the layer of the eye mainly responsible for sight?

Which cranial nerve carries impulses for hearing and balance (equilibrium)?

Which general sense is related to equilibrium?

True or false: Somatic Reflexes incorportate skeletal muscle movement?

The parasympathetic nervous system does what to the heart beat?

The sympathetic nervous system has what effect on the pupil?