Whhat is being sloughed off during desqamation?
Stratum corneum cells
People with dark skin have
High tyrosinase activity and high melanin production
Albinism is what type of disease?
Homozygous recessive
What are freckles more visable with pure UV light?
Melanin reflecgs UV light
What cell is most abundent in the brain?
Glial cell
Depolarization is
When the transmembrane potential becomes more positive than the resting membrane potential
Kinesib facilitates
Transport of vesicles to the positive end of the cell
What would cause depolarization
Influx of sodium into the cell
What is a node of reanvier
Axolemma
What ion is the current in your axons?
K+
What are gap junctions?
Comminicating channels connecting 2 cells cytoplasms
The NMDA receptor is
Ligand-gaged calcium channel and a voltage gated calcium channel
What kind of neuron trasmit signals to the brain for your special senses
Bipolar
Whats the name of the cells that line the ventricles of the brain and the central canal of the spinal cord
Ependymal cells
Which of the following is most responsible for establishing a cells resting membrane potential
K+ leak channels
There is a higher concentration of K+ in ECF than in ICF
False
The sodium potassium pump pumps 3 sodium out and 2 potassium in
True
There is a lower consentration of sodium in the ICF than ECF
True
There is a lower concentration of cloride in the ICF than in ECF
True
Part of junctional complex
Demosomes, tight junction, adhering junction
The epidermis is avascular
True
Thin skin lacks lucidum
True
The hypodermis is a layer of skin visceral to the dermis
False
Stratum spinosum is parietal to basale
True
Meissners and pacinian corpuscles are tactile organs
True
Proper order of sequence
Cholecalciferol–calcidol–calcitriol (active Vit D)
The glial cells of the CNS responsible for the formation of the blood brain barrier
Astrocytes
Ependymal cells to venticles
Correct
Olifodendrocytes to pedicels
Incorrect
Schwann cells to PNS myelin
Correct
Astrocyes to most abundent cell in the brain
Correct
Microglial cells to phagocytosis
Correct
Properties of neurons
Excitablility, conductivity, secretion
Components of a chemical synapse
Ligand gated channels, presynaptix knob, synaptic cleft
Where is thick skin found?
Palms of hands and soles of feet