Phys Ch. 12 Word Scramble
|
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
| Question | Answer |
| During an action potential, voltage gated K channels open after voltage gated Na channels. What effect does this have on the membrane potential? | It becomes less positive and more negative |
| A change in membrane potential insufficient to cause an action potential is known as a __ __. | subthreshold value |
| What must happen in order for a chemical signal to change the membrane potential of a neuron (2)? | there must be a change in the number of open ion channels and in ion flow across the membrane |
| The main activity of __ is nerve impulse conduction. | axons |
| Rank the conduction velocity of the groups of nerve fibers from fastest to slowest: A. type A fibers B. type C fibers C. type B fibers | A. type A fibers, C. type B fibers, B type C fibers |
| The regulation of the response of neurons to neurotransmitters is known as __. | neuromodulation |
| The opposition to the movement of electrical charge is known as __. | resistance |
| The "E" in EPSP stands for __, meaning that the potential makes the inside of the postsynaptic cell more __. | excitatory, positive |
| A flow of electrical current called a(n) __ __ is generated within the initial segment of a neuron. | action potential |
| A positive change in the membrane potential is called __. | depolarization |
| During the __ __ an axon is either incapable of generating an action potential, or requires a larger than normal stimulus | refractory period |
| Which electrical event immediately follows the binding of neurotransmitter molecules to chemically gated ion channels? | postynaptic potential |
| The all or none law refers to the fact that action potentials will only occur if the initial segment reaches __. | threshold |
| If several EPSPs occur at different synapses, they undergo __ __ at the initial segment. | spatial summation |
| The relative difference in charge across the plasma membrane of a resting neuron is known as the __ __ __. | resting membrane potential |
| Flow of which ion is the most common cause of repolarization? | K |
| A nerve impulse that "jumps" from node to node is called __ conduction. | saltatory |
| Acetylcholinesterase removes acetylcholine from the synaptic cleft via __. | hydrolysis |
| Which type of axon requires more ATP to function? A. myelinated axon B. unmyelinated axon | B. unmyelinated axon |
| Neuronal pools are made of: A. motor neurons B. interneurons C. sensory neurons | B. interneurons |
| Creating and transmitting __ currents is central to the function or neuron physiology. | electrical |
| The chemical concentration gradients of Na and K are maintained by the __ __. | Na/K pump |
| The presence of a __ sheath increases the rate of impulse conduction. | myelin |
| Graded potentials that occur in postsynaptic neurons are specifically called postsynaptic __. On the distal side of a synaptic cleft. | potentials |
Created by:
khinson