Anatomy Chapter 23
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Anatomy Chapter 23
What are structures that detect stimuli?
What type of receptors is relatively simple in structure and distributed throughout the skin and organs?
What type of receptor is complex in structure and located in the head?
special sense receptors
Based on the origin of the stimulus, what type of receptor detects stimuli from the external environment?
Based on the origin of the stimulus, what type of receptor detects stimuli from the internal environment?
Based on the origin of the stimulus, what type of receptor responds to stimuli dealing with the position of the body?
What type of receptor is found in the body wall?
somatic sensory receptors
What type of receptor is found in the viscera?
visceral sensory recptors
Based on the modality of ths timulus, what type of receptor detects specific molecules?
Based on the modality of the stimulus, what type of receptor responds to changes in temperature?
Based on the modality of the stimulus, what type of receptor responds to light?
Based on the modality of the stimulus, what type of receptor responds to touch, pressure, vibration, or stretch?
Based on the modality of the stimulus, what type of receptor responds to changes in pressure within the body?
Based on the modality of the stimulus, what type of receptor responds to pain?
What type of pain involves the perception of pain in an amputated or excised part of the body?
What type of pain occurs when impulses from certain viscera are perceived as originating not within the organ, but in the dermatomes of the skin?
What is the probable cause of referred pain?
common neural pathways
What is gustation?
What are gustatory receptors?
What is the sense of smell?
What cranial nerve carries impulses from olfactory receptors?
I - olfactory nerve
Whay layer of specialized stratified squamous epithelium forms a continuous lining of both the external, anterior surface of the eye and the internal surface of the eyelid?
What are the slightly curved rows of thick, short hairs at the superior edges of the orbits along the orbital ridges?
What is the function of eyebrows?
keep sweat from dripping in the open eye
What structures extend from the margins of the eyelids and prevent large foreign objects from coming into contact with the anterior surface of the eye?
What are the movable anterior protective coverings over the surface of the eyes?
What is the fibrous core of the eyelids?
What are the sebaceous glands within the eyelids?
What are the small, redidish bodies at the medial commissure of each eye?
What glands lie within the lacrimal caruncle?
What structures produce tears?
What openings drain tears from the eye into the nose?
What structure drains tears from the lacrimal puncta?
What structure collects tears and sits in the lacrimal fossa of the lacrimal bones?
What structure drains tears into the nose?
What is the external layer of the eyeball?
What is the avascular, transparent, anterior portion of the fibrous tunic of the eye?
What is the white of the eye?
What is the middle layer of the eye wall?
What region of the vascular tunic is posterior and is the most extensive and houses a vast network of capillaries to supply the retina?
What portion of the vascular tunic of the eye is a muscular ring that works to focus images on the retina?
What portion of the vascular tunic of the eye is the most anterior and is what we commonly refer to when we speak of the color of the eye?
What is the opening within the iris?
What layer of the eye contains photoreceptors?
neural tunic or retina
What posterior portion of the eye do neurons extend through and form a round structure frequently referred to as the blind spot?
What rounded, yellowish region has a concentration of cones and lies lateral to the optic disc?
What is the area of sharpest vision on the retina?
What is the strong, deformable, transparent structure of the eye that focuses images on the retina?
What dense, elastic structure bounds the lens of the eye?
What structures attach to the lens capsule at its periphery where they transmit tension to change the shape of the lens?
What structure of the eye changes the shape of the lens?
The lens divides the interior of the eye into two spaces. What are these?
anterior & posterior cavities
The iris divides the anterior cavity of the eye into two spaces. What are they?
anterior & posterior chambers
What fluid fills lies between the lens and the cornea of the eye?
What structure forms aqueous humor?
epithelium of the ciliary body
What structure reabsorbs aqueous humor?
scleral venous sinus
What gelatinous matter fills the posterior cavity of the eye?
What cranial nerve carries impulses from the retina to the brain?
II - optic nerve
The optic nerves converge anterior to the pituitary gland to form what structure?
What are the three anatomic regions of the ear?
external, middle & inner
What is the skin-covered, elastic cartilage supported projecting portion of the external ear?
auricle or pinna
What is the structure made of soft tissue and cartilage lining the external auditory meatus?
external auditory canal
What is the delicate, funnel-shaped epithelial sheet that is the partition between the external and middle ear?
What glands lie within the external auditory canal?
What space lies within the middle ear?
What stricutre communicates the middle ear cavity with the atmosphere and thus allow the pressure of the middle ear cavity to equal that of the atmosphere and the outer ear?
The auditory tube connects the middle ear cavity with what other anatomical structure?
Collectively, what are the three small bones of the middle ear called?
What small bone is attached to the deep surface of the tympanic membrane?
Which of the three ear ossicles lies between the other two?
What small bone is attached to the oval window?
What are the bony spaces or cavities of the inner ear?
What are the fluid-filled tubes of the inner ear?
What portion of the inner ear lies between the cochlea and the semicircular canals?
What are the three half-circle-shaped structures of the inner ear?
What is the snail-shaped portion of the inner ear?
What cranial nerve transmits impulses from the inner ear to the brain?
VIII - vestibulocochlear nerve