Hondros Bio 253
Layers of the skin correct answersepidermis, dermis, hypodermis
Stratum Corneum correct answersProtective durable overcoat, waterproof, tough, relatively insensitive to biological, chemical and physical assault.
Stratum Lucidum correct answersvisible only in thick skin, few layers thick, dead clear cells
Stratum Granulosum correct answers3-5 layers of thick keratinocytes flastten out
Stratum Spinosum correct answersoverlies the stratum basale, cells come from the basale, filaments u the cells that resist tension, keratinocytes have a spiny appearance, contain langerhen cells
Stratum Basale correct answersDeepest layer, single row if renewing keratinocytes that
are getting ready to push up, melaninocytes, small portion of merkel cells
Parts of a neuron correct answersCell body, Dendrites, Axon
Cell body correct answersProvide protein for maintaining and regenerating nerves
Dendrites correct answersEach neuron had one or more dendrites, branch from the cell
body, bring impulses in, distal ends of dendrites of sensory neurons are receptors
Axon correct answersEach neurons has one axon, axon hillock integrates incoming signals. axons carry impulses away and communicates
Afferent neurons correct answersBrings signal to CNS, *sensory
Efferent neurons correct answersCarry signals away, *motor
Reflex Arc correct answersReceptor, afferent, interneuron, efferent, effector, response
Membrane potential correct answersSlight deficiency of positively charged ions on the inside of the membrane
Saltatory conduction correct answersIn myelinated fibers, action potentials in the membrane occor only at the nodes of Raniver
Continuous conduction correct answersIn unmyelinated fibers Acetylcholine correct answerschemical structure, found in junctions with motor effectors
(skeletal muscles, glands, many parts of the brain
Brain stem correct answersMedulla oblongata, pons, midbrain
Diencephalon correct answersHypothalamus, Thalamus
Cerebellum correct answersCompares motor commands of cerebrum with proprioceptor information, acts with cerebral cortex to produce skilled movements, controls balance and posture
Frontal lobe correct answersReasoning, planning, parts of speech, movements, emotions, and problem solving
Parietal lobe correct answersmovement, orientation, recognition, perception of stimuli, lanuagae
Temporal lobe correct answersperception and recognition of auditory stimuli, memory, and speech
Occipital lobe correct answersvisual processing
Olfactory nerve (CN I) correct answerssense if smell
Optic nerve (CN II) correct answerssense of sight
Oculomotor nerve (CN III) correct answerseye movement, regulation of size of pupil, accommodation, proprioception (muscles sense)
Trochlear nerve (CN IV) correct answerseye movement, proprioception
Trigeminal nerve (CN V) correct answerssensation of head and face, chewing movements, proprioception
Abducens nerve (CN VI) correct answersabduction of eye, proprioception
Facial nerve (CN VII) correct answersfacial expressions, secretion of saliva, tears, and taste
Vestibulocochlear (CN VIII) correct answersbalance of equilibrium sense, hearing
Glossopharyngeal nerve (CN IX) correct answerssensations of tongue, swallowing movements, secretions of saliva, aid in reflex control of blood pressure and respiration
Vagus nerve (CN X) correct answerssennsation and movements of organs supplied, slow heart, increases peristalsis, contracts muscles for voice production
