BIO 669 Neuro I Questions And Answers With Complete Updates

BIO 669 Neuro I Questions And Answers With Complete
Updates

, BIO 669 Neuro I Questions And Answers With Complete
Updates


3 components of a neuron - cell body/soma, dendrites, axons
II II II II II II II II II II II




II IIDensely packed cell bodies in the CNS are II II II II II II II II . - nuclei II II II II




II IIDensely packed cell bodies in the PNS are II II II II II II II II . - ganglia
II II II II




II II
are the receiving part of the neuron. They receive incoming signals II II II II II II II II II II II



II and send signals to the neuron
II . They eventually converge into the
II II II II II II II II II II II



II . - Dendrites, cell body, axon hillock II II II II II II II II II




II II II are able to be affected by external stimuli. - Dendrites
II II II II II II II II II II II




II II - take the signal to the end of the cell and carry impulses AWAY from the cell
II II II II II II II II II II II II II II II II



body toward another neuron or effector. - axons
II II II II II II II II II II




II IIThe II is a cone-shape where the axon leaves the cell body. II II II II II II II II II II II



II The axon hillock determines whether there is enough
II II II II II II II II II



II to develop and sustain an AP to send down the axon hillock. - axon II II II II II II II II II II II II II II II II



II hillock, excitatory graded potentials II II II




As dendrites bring signals into the
II II II II II II II II
II II
II some may be II II



II -more likely to generate signal or II II II II II II -prevent signal from II II



II being developed. - neuron cell body, excitatory, inhibitory
II II II II II II II II II




The initial segment of the axon is the area of the axon having the
II II II II II II II II II II II II II II II II threshold
II



for stimulation, so the AP
II II at this point. - lowest, begin II II II II II II II II II II II II




During the
II II state, an imbalance of ions is created and maintained by ion
II II II II II II II II II II II II II



pumps and lack of permeability to ions. - resting state
II II II II II II II II II II II II




The concentration of ions are given in
II II II II II II II II II . The separation or
II of ions
II II II II II



and charges creates an
II II II II II
II
. Little to no difference in II II II II II



charges between inside and outside
II II II II II II . - mOsm,mM II II II II



polarization
electrical potential II



depolarization

II IIThe II refers to the inside of the cell, a -70mV -the charge II II II II II II II II II II II II



II associated with the inside of the cell means that the inside aka the II is more II II II II II II II II II II II II II II



II than the extracellular environment. - membrane potential, cytoplasm, more
II II II II II II II II II II II



II negative