o power her movement, an electrical “signal” called a/n Blank 1 must first propagate down a Blank 2 neuron. A neurotransmitter signals the motor neuron to initiate an action potential. This occurs at the Blank 3 portion of the neuron (name a part of the neuron, not a segment).
Added by Jeffery C.
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The correct term for this electrical signal is "action potential." Show more…
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Use choices from the following word bank to fill in the blanks: Calcium ions, Myosin, Action potential, ATP, Acetylcholine, Troponin, Synaptic cleft, T-tubules, Motor end plate, Axon An action potential travels down the axon of the motor neuron until it reaches the motor end plate. The action potential causes the release of acetylcholine from the presynaptic terminal. Acetylcholine diffuses across the synaptic cleft and binds to its receptors on the motor end plate. This binding creates an action potential, which travels down the sarcolemma and down the T-tubules to the terminal cisternae of the sarcoplasmic reticulum.
Adi S.
Part II: Neuron Function In the space below detail the steps involved in the communication of a signal between two neurons, starting with the first step of the action potential and ending with neurotransmitter release from the presynaptic terminal. Note which ion channels are open and which are closed and which directions the particular ions are moving (into or out of the cell) at each step along the way. Use the figure to help you along. Please number your steps according to the numbers in the figure.
Supreeta N.
Muscle Contraction Worksheet Muscles will contract in response to a "message" from a motor neuron (nerve cell). Label the drawing with the correct parts of the neuron. Soma, axon, dendrite, terminal boutons (buttons), node of Ranvier, myelin sheath. Use this word list to fill in all the blanks below. Actin Action potential Acetylcholine Troponin Calcium channels Myosin Sarcoplasmic reticulum Tropomyosin Synaptic vesicles Transverse tubules Sarcolemma 1. An ______ travels down the length of the neuron's axon. 2. The Action Potential will cause ______ at the end of the axon to open. 3. Ca++ is in high concentration outside the cell & in low concentration inside the cell. Therefore, Ca++ diffuses into the axon. (Define diffusion. Does it require the input of energy?) 4. Ca++ influx causes ______ containing ______ (the neurotransmitter released at ALL skeletal muscles) to move to the axonal terminus, fuse onto the membrane, and release ACh from the neuron (exocytosis). 5. The binding of ACh to the ACh receptors on the motor end-plate initiates the formation of an action potential along the ______ of the muscle fiber!
Madhur L.
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