Anatomy-Nervous Sys
Help!
|
|
||||
|---|---|---|---|---|---|
| What does a nerve fiber include? | axon and dendrite
🗑
|
||||
| What is a plexus | a network of nerves, veins, or lymph vessels
🗑
|
||||
| bundle of nerve processes (axons) in CNS | tract
🗑
|
||||
| bundle of nerve processes (axons) in the PNS | nerves
🗑
|
||||
| What three things make up the PNS | nerve, ganglion, and nucleus
🗑
|
||||
| collection of neuron cell bodies OUTSIDE the CNS | ganglion
🗑
|
||||
| collection of neuron cell bodies INSIDE the CNS | nucleus
🗑
|
||||
| the nerves that innervate skeletal muscles | somatic nervous system
🗑
|
||||
| sensory receptors and control visceral function | autonomic nervous system
🗑
|
||||
| neurons that detect changes in the environment and transmit info to brain or spinal cord | sensory (afferent) neurons
🗑
|
||||
| neurons that lie between sensory and motor pathways in CNS | interneurons
🗑
|
||||
| 90% of our neurons are ____________ | interneurons
🗑
|
||||
| neurons that process, store and retrieve info | interneurons
🗑
|
||||
| what is the most common neuronal classifcation | multipolar neuron
🗑
|
||||
| what is a bipolar neuron made of | one dendrite and one axon
🗑
|
||||
| cells in the CNS and PNS that support and protect neurons | neuroglial (glial) cells
🗑
|
||||
| what do oligodendrocytes do | form myelin in the CNS
🗑
|
||||
| what do astrocytes do | maintain blood-brain barrier and proper ion balances
🗑
|
||||
| where are ependymal cells found | line ventricles and form cerbrospinal fluid
🗑
|
||||
| what are microglia cells like | macrophages that eliminate microbes
🗑
|
||||
| cells that myelinate fibers of the PNS | schwann cells
🗑
|
||||
| cells that support PNS ganglia and hlp in regeration sometimes | satellite cells
🗑
|
||||
| what are the gaps between myelin segments called | nodes of Ranvier
🗑
|
||||
| highly responsible to stimuli | excitability
🗑
|
||||
| when action potential reaces end of nerve fiber, a neurotrasmitter is released | transmission
🗑
|
||||
| are living cells positive or negative on the inside | negative
🗑
|
||||
| how is a voltage gated channel opened | by electric current
🗑
|
||||
| how is a ligand gated channel opened | by chemicals
🗑
|
||||
| how is a mechanically gated channel opened | by vibrations, movement or touch
🗑
|
||||
| How is resting membrane potential maintained? | seletive permeable membrane and Na/K active pumps
🗑
|
||||
| How many mV is a membrane at resting potential | 70 mV
🗑
|
||||
| At resting potential, the membrane is more permeable to ________ and less permeable to __________ | Potassium, Sodium
🗑
|
||||
| How many mV is threshold potential | 55 mV
🗑
|
||||
| ____________ channels open once threshold is reached, thus causing depolarization | sodium
🗑
|
||||
| In order to repolarize the cell, _____________ gates open to let it out | potassium
🗑
|
||||
| Which type of potential is all-or-none, nondecremental and irreversible | action potential
🗑
|
||||
| when does the absolute refractory period occur in action potentials | right above threshold so no stimulus will trigger AP; when Sodium gates are opened
🗑
|
||||
| When does relative refractory period occur | during repolarization when potassium gates are opened - only strong stimulus will trigger AP
🗑
|
||||
| a nerve signal is a chain reaction of | acction potentials
🗑
|
||||
| impulse conduction can only travel ________ from soma because of refractory period | away
🗑
|
||||
| type of potential where the stronger the stimulus, the stronger the reaction | graded potentials
🗑
|
||||
| potential that causes lgiand or mechanical channels to open | graded potential
🗑
|
||||
| type of potential that is decremental and either excitatory or inhibitory | graded potentials
🗑
|
||||
| What two things determine the speed of a nerve signal | diameter of fiber and presence of myelin
🗑
|
||||
| where are slow nerve signals used | stomach and dilate pupils
🗑
|
||||
| where are fast nerve signals used | skeletal muscles and sensory signals for vision
🗑
|
||||
| which is faster: a chemical synapse or an electrical synapse | electrical synapse
🗑
|
||||
| electrical synapses are faster because the current spreads to second neuron directly through ___________ | gap junctions
🗑
|
||||
| what type of synapse is has two way transmission and synchronization | electrical synapse
🗑
|
||||
| Where are electrical synapses found | smooth and cardiac muscle only
🗑
|
||||
| chain of amino acids that act as neurotransmitters | neuropeptides or neuromodulators
🗑
|
||||
| a positive voltage change in which postsynaptic cell is more likely to fire | excitatory postsynapitc potentials (EPSP)
🗑
|
||||
| negative voltage change where postsynaptic cell is less likely to fire | inhibitory postsynaptic potentials (IPSP)
🗑
|
||||
| Is GABA excitatory or inhibitory | inhibitory
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
edeboo