labus Question 46 1 pts Neurotransmitters are released from knob-like terminals at the end of the 1 dendrites. cell body. axon. Online myelin sheath. ring - Previous Next Quiz saved at 8:11pm Submit Quiz
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Neurotransmitters are the chemical messengers neurons use to communicate with each other or to cause muscle contraction. The axon terminal releases neurotransmitters at the synapse. This process produces excitatory or inhibitory responses in the receiving neuron. Neurotransmission can be halted by __________ of the neurotransmitter back into the axon terminal-a process by which the synaptic vesicle reabsorbs the neurotransmitter.
QUESTION 32 The point of connection between two communicating neurons is called the _____. axon hillock dendrite synapse cell body QUESTION 33 The part of a neuron that receives information from other neurons is called: Axon Cell body Axon hillock Dendrite QUESTION 34 Neurotransmitters cross synapses via: Saltatory conduction Nodes of Ranvier Active transport Diffusion QUESTION 35 The operation of the sodium-potassium "pump" moves _____. sodium and potassium ions into the cell sodium and potassium ions out of the cell sodium ions into the cell and potassium ions out of the cell sodium ions out of the cell and potassium ions into the cell QUESTION 36 Two fundamental concepts about the ion channels of a "resting" neuron are that the channels _____. are always open, but the concentration gradients of ions frequently change are always closed, but ions move closer to the channels during excitation open and close depending on stimuli, and are specific as to which ion can traverse them open in response to stimuli, and then close simultaneously, in unison QUESTION 37 The fastest possible conduction velocity of action potentials is observed in _____. thin, non-myelinated neurons thin, myelinated neurons thick, non-myelinated neurons thick, myelinated neurons QUESTION 38 At a neuromuscular junction, what process releases acetylcholine into the synaptic cleft? osmosis active transport diffusion exocytosis
Marlyn J.
Select the correct answer and write it on the line provided. The ______ are the root-like structures of a nerve that receive impulses and conduct them to the cell body. axons dendrites $\quad$ ganglions $\quad$ neurotransmitters
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