Sensory receptors are ______ of sensory neurons specialized for receiving specific kinds of stimuli - ✔✔ dendrites
What are "free" nerve endings?
... [Show More] - ✔✔ dendrites whose terminal ends have little or no physical specialization
What are encapsulated nerve endings? - ✔✔ dendrites whose terminal ends are enclosed in a capsule of connective tissue
Sense organs (such as the eyes and ears) consist of sensory neurons with receptors for the special senses (vision, hearing, smell, taste, and equilibrium) together with - ✔✔ connective, epithelial, or other tissues
Exteroceptors occur where
Sensitive to? - ✔✔ at or near the surface of the skin and are sensitive to stimuli occurring outside or on the surface of the body
Interoceptors are also called
Sensitive to? - ✔✔ visceroceptors
respond to stimuli occurring in the body from visceral organs and blood vessels
Which receptors are the sensory neurons associated with the ANS? - ✔✔ interoceptors (aka visceroceptors)
Proprioceptors respond to - ✔✔ stimuli occurring in skeletal muscles, tendons, ligaments and joints
Which receptors collect information concerning body position and physical conditions of these locations? - ✔✔ proprioceptors
____receptors respond to physical force such as pressure (touch or blood pressure) and stretch - ✔✔ mechanoreceptors
____receptors respond to light - ✔✔ photoreceptors
____receptors respond to temperature changes - ✔✔ thermoreceptors
_____receptors respond to dissolved chemicals during sensations of taste and smell and to changes in internal body chemistry such as variations of O2, CO2, or H+ in the blood - ✔✔ chemoreceptors
_____ respond to a variety of stimuli associated with tissue damage. The brain interprets the pain - ✔✔ Nociceptors
The somatic (general) senses collect information about - ✔✔ cutaneous sensations and proprioceptive snesations
What are Merkel discs?
Located where? - ✔✔ receptors with free nerve endings that detect surface pressure (light touch). They are located deep in the epidermis
What are root hair plexuses? - ✔✔ receptors with free nerve endings that surround hair follicles and detect hair movmement
Corpuscles of touch (aka ____) are receptors with.... - ✔✔ aka Meissner's corpuscles
receptors with encapsulated nerve endings located in the dermal papillae (near the surface) of the skin that detects surface pressure (light touch)
What are pacinian corpuscles?
Located where? - ✔✔ encapsulated nerve receptors that detect deep pressure and are located in the subcutaneous layer (below the skin)
Proprioceptive stimuli are detected by - ✔✔ free nerve ending nociceptors
Proprioceptive stimuli are detected by what three receptors - ✔✔ Muscle spindles
Golgi tendon organs
Joint kinesthetic receptors
Where are muscle spindles located? - ✔✔ belly of muscle
Where are golgi tendon organs located? - ✔✔ at the junctions of tendons and muscles
Where are joint kinesthetic receptors located? - ✔✔ in synovial joints
What is the scientific name for eyelids? - ✔✔ palpebrae
Contraction of what muscle raises the upper eyelid - ✔✔ levator palpebrae
Each eyebrow is supported internally by a layer of - ✔✔ CT called the tarsal plate
The inner lining of the eyelid, the ______, is a mucous membrane that produces secretions that lubricate the eyeball - ✔✔ conjunctiva
The ________ apparatus produces and drains tears - ✔✔ lacrimal apparatus
In each eye, tears flow across the eyeball and enter what two openings - ✔✔ lacrimal puncta into lacrimal canals that lead to the lacrimal sac
Tears contain (2) - ✔✔ antibodies and lysozyme (a bacteria destroying enzyme)
The eyeball is a hollow sphere whose walls consist of what three layers - ✔✔ Fibrous tunic
Vascular tunic
Nervous tunic
The fibrous tunic consists of - ✔✔ avascular connective tissue called sclera and the cornea
What does the sclera do - ✔✔ maintains the shape of the eyeball
What does the iris do - ✔✔ Controls how much light enters the pupil
What does the pupil do - ✔✔ regulates the amount of light entering the eye and helps bring objects into focus
What is the aqueous humor? - ✔✔ the clear fluid filling the space in the front of the eyeball between the lens and the cornea. [Show Less]