Nervous Tissues Flashcards
_________ act as a phagocyte
Microglial Cells
Synaptic Knobs are also called _____
End Bulbs and or terminal boutons
What are the events of a synaptic transmission from Earliest to latest?
Action Potential reaches synaptic knob
Voltage gated calcium channels open
Calcium enters the synaptic knob
Calcium triggers exocytosis of vesicles
Neurotransmitter diffuses across synaptic cleft
Neurotransmitter binds to postsynaptic receptors
The plasma membrane of the axon is called the __________.
Axolemma
Location with larger concentrations or ions in the extracellular
Sodium
Chloride
Location with larger concentrations or ions in the Intracellular
Potassium
Organic anions
What must happen in order for a chemical signal to change the membrane potential of a neuron? (Hint 2 things)
There must be a change in the number of open ion channels
There must be a change in Ion flow across the membrane
Dendrites transfer information _________the cell body.
toward
_______ are excitable cells that initiate and transmit electrical signals.
Neurons
A Substance synthesized at the cell body must undergo _____ transport to reach the synaptic knobs.
Anterograde
What is Retrograde?
Movement towards the cell body
What is Anterograde
Occurring along the nerve processes away from the cell body.
The epineurium is made of ______connective tissue
Dense irregular
Which two, are divisions of the SENSORY nervous system?
Somatic Division
Visceral Division
When chemically or voltage gated channels open, there is a change in ion_________across a membrane.
Flow
