NERVOUS SYSTEM

6. transmitter removal that consists of enzymatic breakdown of the neurotransmitter
9. depolarization during an action potential is an example of a _______ feedback loop
10. the status that a neuron must achieve before a voltage-gated sodium channel can be deactivated
12. Sodium ions rush into a cell during the _____ phase of an action potential
14. the space between two neurons that can be electrical or chemical
15. this part of a neuron is where the nucleus is located
16. results in a more positive membrane polarization
17. the _____ equation describes the equilibrium potential for a particular ion
19. these channels are always open, allow ions to flow freely, and are not gated
20. fibers that innervate skeletal muscles are part of this nervous system
21. this portion of a neuron receives incoming information from distal neurons
23. proteins that make up gap junctions
25. this pathway refers stimulus information from sensory receptors to the CNS

1. results in a more negative membrane polarization
2. this portion of the ear consists of the oval window, cochlea, and vestibular apparatus
3. SSRIs like Zoloft work by blocking the re-uptake of _______
4. there are two types: absolute and relative
5. refers to a voltage-gated sodium channel that is closed and not capable of opening
7. this location on a neuron is where an action potential begins
8. this transmitter activates secondary messenger systems
11. this type of potential can vary in magnitude, is spread by passive current, and dies out over short distances
12. at ________ potential, neither sodium nor potassium ions are at their equilibrium
13. this division of the peripheral nervous system is associated with the fight/flight response
18. a component of a neuron that acts as insulation
22. describes when the synaptic output of one neuron is put onto many neurons
24. this ion enters the synaptic knob and causes neurotransmitter release via exocytosis