In discussing nuerites, neurons typically have one __, but many ___. A. Axon; dendrites B. Dendrites;axons C. Cell body; axons D. Dendrites; cell bodies
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- Which part of a neuron transmits an electrical signal to a target cell? Choose one answer. a. dendrites b. cell body С. ахоп d. somaWhich part of the neuron likely contains the most vesicles? a. Dendritesb. Cell bodyc. Nucleusd. Axone. Axon Terminal Which part of the neuron has the most voltage-gated calcium channels? a. Dendritesb. Cell bodyc. Nucleusd. Axone. Axon TerminalWhich of the following is not correct about myelin sheaths? Select one: O A. They insulate parts of the neuron axon but not the cell body and dendrites. O B. They are fatty membranes. O C. They are formed by glial cells, namely oligodendrocytes and Schwann cells. O D. They are responsible for saltatory conduction, the process in which the action potentials jump between nodes of Ranvier. O E. They increase the speed of action potential conduction along an axon by increasing the diamter of the axon.
- I. These forms the specialized junctions called synapse. A. Cell body B. Glial cells C. Synaptic terminal D. Neurotransmitters II. These are the gaps in the myelin sheath which is the site where signals are recharged as they travel down the axon. A. Neurotransmitters B. Axon hillock C. Dendrites D. Nodes of Ranvier III. These neurons form the local circuits that connect neurons in the brain A. Interneurons B. Axon hillock C. Dendrites D. Soma17) What part of a neuron contains the nucleus? a. Dendrite.b. Cell body (soma).c. Axon.d. Node of Ranvier. 18) Which type of glial cell is a macrophage ( phagocyte )?a. Microglia.b. AstrocYte.c. Oligodendrocyte. d. Schwann cell.What characteristic distinguishes dendrites from axons?a. Presence of branches at the tipsb. Direction of impulse transmission relative to cell bodyc. Whether they direct impulses toward or away from the braind. Presence of sodium channels in the cell membrane
- Match the description with the statement that best describes the following regions dendrites A. elongated projection that conducts electrical signals over long distances B. receives input from other neurons axon hillock C. "region of high denisty of voltage-gated channels, known as the trigger zone" ахon D. contains numerous vesicles containing neurotransmitter synaptic knobThe part of a neuron that contains the nucleus is the a. cell body b. dendrite c. axon d. glialWhich of the following is not correct about myelin sheaths? Select one: O A They insulate parts of the neuron axon but not the cell body and dendrites. O B. They increase the speed of action potential Onduction along an axon by increasing the diamter of the axon. O C. They are formed by glial cells, namely oligodendrocytes and Schwann cells. O D. They are responsible for saltatory conduction, the process in which the action potentials jump.between nodes of Ranvier O E. They are fatty membranes.
- A stimulus causes a change in permeability of neural membranes, which begins the process of transmitting an impulse. If the stimulus reaches the threshold potential of a neuron, an action potential is generated. Select the numbers of the statements below that occur once the threshold potential is reached. 1. Sodium ions flow into the neuron. 2. Sodium ions flow out of the neuron. 3. The membrane potential becomes positive. 4. The membrane potential becomes negative. 5. Voltage-gated potassium channels open. 6. Voltage-gated potassium channels close. 7. Potassium ions flow into the neuron. 8. Potassium ions flow out of the neuron. Place the numbers in order from the first event to the last event: andWhich of the following is true about the conduction of action potentials? a. Thicker axons are faster because there is more surface area on thicker axons. b. Myelin speeds conduction because the glial cells add voltage gated Na+ channels to the neuron. c. Diffusion of Na+ ions between the Nodes of Ranvier happens faster than the wave of opening and closing membrane proteins can travel. d. Neurons that don’t have myelin sheaths undergo saltatory conduction e. Action potentials move slowly.Which of the following is true of axons? Select one: O a. contain sensory areas O b. very thin and short C. originate at the axon hillock on the cell body d. transmit short electrochemical impulses