Intro to nervous system 1 - Borges
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Functional units of the nervous system are ___________. | Neurons
🗑
|
||||
| Axons are unbranched except _______. | at their ends
🗑
|
||||
| Most cells in the brain are ______ cells. | glial
🗑
|
||||
| ___________ provide structural and metabolic support, and participate in the blood brain barrier. | Astrocytes
🗑
|
||||
| Myelin forming cells in the CNS are _________. | Oligodendrytes
🗑
|
||||
| Myelin forming cells in the PNS are _________. | Schwann cells
🗑
|
||||
| Disease during which the myelin sheaths are gradually degraded by the immune system. | Multiple Sclerosis
🗑
|
||||
| Macrophages in the brain | Microglia
🗑
|
||||
| Form tracks for migrating neurons during development. | Radial Glia
🗑
|
||||
| The resting potential arises from uneven distribution of ions across the membrane. Outside is mainly ____. | Na+
🗑
|
||||
| The resting potential arises from uneven distribution of ions across the membrane. Inside is mainly ____. | K+
🗑
|
||||
| The sodium-potassium pump helps maintain the concentration gradient. Ion movement by the sodium-potassium pump moves how many, and which ion from the inside to the outside. | 3 Na+
🗑
|
||||
| The sodium-potassium pump helps maintain the concentration gradient. Ion movement by the sodium-potassium pump moves how many, and which ion from the outside to the inside. | 2 K+
🗑
|
||||
| When Na+ leaks down its concentration gradient, in which direction does it move? | Outside to inside
🗑
|
||||
| When K+ leaks down its concentration gradient, in which direction does it move? | Inside to outside
🗑
|
||||
| When a cell becomes depolarized, which side is more positive? | outside
🗑
|
||||
| How can a cell become depolarized? | Open Na channels, Na enters the cell; Open Ca channels, Ca enters the cell; Close K channels
🗑
|
||||
| When a cell is hyperpolarized, which side is more positive? | The outside
🗑
|
||||
| When a cell is hyperpolarized, which side is more negative? | The inside
🗑
|
||||
| When a cell becomes depolarized, which side is more negative? | The inside
🗑
|
||||
| How can a cell become hyperpolarized? | Open K channels and K exits the cell; open Cl channel and Cl enters the cell
🗑
|
||||
| _________ is the sudden reversal of the membrane potential and is an all or none response. | Action potential
🗑
|
||||
| What is the threshold potential voltage? | The voltage at which gated Na+ channels open and reverse the MP to about +50 mV
🗑
|
||||
| ________ is the period during which no action potentials can be initiated and all sodium channels are inactivated. | Absolute refractory period.
🗑
|
||||
| _______ is the period during which some sodium channels are inactivated by not all. | Relative refractory period
🗑
|
||||
| Why is there one-way movement of the neuronal signal? | The refractory period does not allow an action potential to occur.
🗑
|
||||
| The _______ the diameter, the faster the conduction of a nerve. | Larger
🗑
|
||||
| The larger the diameter, the _____ the conduction of a nerve. | conduction
🗑
|
||||
| The action potential jumps from node to node in myelinated nerves. This is called ________. | Saltatory conduction
🗑
|
||||
| Which is faster, myelinated nerves or nonmyelinated nerves? | Myelinated nerves
🗑
|
||||
| Which cells make myelin in the CNS? | Oligodendrytes
🗑
|
||||
| Which cells make myelin in the PNS? | Schwann cells
🗑
|
||||
| What two types of junctions are there between neurons? | Electrical synapses and chemical synapses
🗑
|
||||
| The cytoplasm of 2 cells is connected by _______ through which ions can travel from cell to cell. | gap junctions
🗑
|
||||
| Neurotransmitter receptors are located on the __________ membrane. (presynaptic / postsynaptic) | Postsynaptic
🗑
|
||||
| How are neurotransmitters removed from the synaptic cleft | Re-uptake or enzymatic breakdown
🗑
|
||||
| What breaks down acetylcholine into acetate and choline? | Acetylcholinesterase
🗑
|
||||
| What kind of receptors bind norepinephrine? | Adrenergic receptors
🗑
|
||||
| How is norepinephrine degraded? | Mono-aminoxidase (MAO) or taken back up into synaptic vessels in the presynaptic cleft
🗑
|
||||
| This is also known as excitatory postsynaptic potential (EPSP). | Depolarization
🗑
|
||||
| What kind of neurotransmitters open cation channels leading to Na+ influx and depolarization? | Glutamate and acetylcholine
🗑
|
||||
| the current associated with EPSP is called ________. | Excitatory postsynaptic current (EPSC)
🗑
|
||||
| The voltage-gated Na+ channel threshold potential is about _________. | -40 mV
🗑
|
||||
| Axon potentials are triggered at the ___________. | Axon hillock
🗑
|
||||
| Hyperpolarization is called _________________. | Inhibitory postsynaptic potential (IPSP)
🗑
|
||||
| What does neurotransmitters such as GABA do? | Open Cl- channels that hyperpolarize the postsynaptic membrane which decrease the tendency of the receiving cell to develop action potentials.
🗑
|
||||
| Which way does chloride usually flow? | inwards
🗑
|
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:
P1StudyStack
Popular Physiology sets