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bios 252 A&P final

Which of the following structures are parts of the peripheral nervous system The sensory receptors, The spinal ganglia, Neuromuscular junctions, Peripheral nerves
Perception is the conscious interpretation of Internal sensations & External sensations
Receptor Level Sensor receptors
Circuit level Ascending pathways
Perceptual Level Neuronal circuits in cerebral cortex
Adaptation of sensory receptors are The receptor becomes less responsive and The receptor potentials decline in frequency or stops
Which receptors do not exhibit adaptation Pain & Proprioceptors
second order neurons Their soma resides in the dorsal horn of the spinal cord or medullary nuclei and transmits impulses to the thalamus or cerebellum
First order neuron Their soma reside in dorsal root or cranial ganglia, and conduct impulses from the skin to the spinal cord or brain stem
Third order neuron Their soma is located in the thalamus and conduct impulses to the somatosensory cortex of the cerebrum
The thalamus projects fibers to The frontal lobe, The red nucleus, The sensory association areas, The somatosensory cortex
The main aspects of sensory perception are perceptual detection; magnitude estimation; and spatial discrimination.
Chemoreceptors Smell, taste, changes in blood chemistry
Mechanoreceptors Touch, pressure, vibration, stretch, itch
Nociceptors Any pain causing stimuli
Photoreceptors Sight
Thermoreceptors Changes in temperature
Tor F = There are two (2) structural classifications of receptors. Most receptors are simple and include our special sense organs False. 2 classifications, most are simple. Complex contains special sense organs
Which of the following receptors (corpuscles or organs) deal with proprioception Golgi tendon organs, Joint kinesthetic receptors, Muscle spindles, Pacinian corpuscles, Ruffini’s corpuscles
TorF - The five basic taste sensations are: sweet, salt, sour, bitter, and umami. And are mapped in different parts of the tongue FALSE. Mapped all over tongue
TorF -Taste is 80% dependent on smell TRUE
T or F - There are six (6) straplike extrinsic eye muscles: four (4) rectus and two (2) oblique muscles True
T or F - Light is refracted by the following components of the eye: at the cornea; entering the lens; and leaving the lens TRUE
What is Emmetropic eye Focal point focused on retina
What is Hypertropic eye Focal point focused behind retina (far sighted)
What is myopic eye Focal point focused in front of retina (near sighted)
There are two (2) types of photoreceptors, rods and cones. Visual acuity is gained when we switch from the __________ to the __________ system Rods to cones
T or F - Depth perception is achieved because the eyes view the same image from slightly different angles true
Which part(s) of the ear are involved with equilibrium Inner ear
The auditory (or pharyngotympanic) tube is in which part of the ear Middle ear
T or F - The purpose of the malleus, incus, and stapes is to transmit vibratory motion from the eardrum to the round window False, it’s the oval window
T or F - The receptors in the crista ampullaris respond to angular movements of the head TRUE
T or F - Cranial nerves are identified by a number and a name TRUE
T or F - Spinal nerves are named according to the point they exit the vertebral column TRUE
T or F - There are 32 cervical nerves: 8 cervical; 12 thoracic; 5 lumbar; 6 sacral; and, 1 coccygeal FALSE -31. 8 cervical, 12 thoraic, 5 lumbar, 5 sacral & 1 coccygeal
T or F - There are two (2) areas of the spinal cord that are larger than the rest of the spinal cord. These areas are called the cervical enlargement and the lumbar enlargement TRUE
T or F - Spinal nerves are mixed nerves that arise from the spinal cord and come out in pairs, one out of each side of the vertebral column TRUE
T or F - The most important nerve of the cervical plexus is the phrenic nerve TRUE
Only one of the following statements about nerve plexuses is false Choose the FALSE statement.
All ventral rami form interlacing nerve networks called plexuses. False because all BUT T2-T12 Check book
T or F - The major nerves of the lumbar plexus are the femoral and obturator nerves TRUE
T or F - The longest and thickest nerve of the body is the sciatic nerve. It is the major nerve of the thoracic plexus FALSE No thoracic plexus. This part of sacral plexus
T or F - Dermatomes are the areas of the skin innervated by the cutaneous branches of spinal nerves. Each spinal nerve only innervates one area TRUE
T or F - All spinal nerves except C1 participate in dermatomes TRUE
T or F - The patellar reflex is an example of a stretch reflex TRUE
T or F - A stretch reflex needs the impulse to reach the brain and come back down to cause the reaction of the muscle(s) FALSE
What is an effector This is a muscle fiber or gland that responds to the efferent impulse
What is Integration Center It is either a monosynaptic or poly synaptic region within the CNS
What is Motor Neuron This conducts efferent impulses from the integration center to an effector
What is receptor Site of stimulus
What is sensory Neuron This transmits the afferent impulse to the CNS
T or F - The flexor reflex is initiated by a painful stimulus (actual or perceived) that causes automatic withdrawal of the threatened body part TRUE
T or F - Superficial reflexes are initiated by rough cutaneous stimulation FALSE, caused by gentle
Created by: rivabard



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