EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
7th Edition
ISBN: 8220102796409
Author: SALADIN
Publisher: YUZU
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Textbook Question
Chapter 12, Problem 2TYR
The highest density of voltage-gated ion channels is found on the_____of a neuron.
- a. dendrites
- b. soma
- c. nodes of Ranvier
- d. internodes
- e. axon terminals
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An action potential begins when______ . a. a neuron reaches threshold potential b. voltage-gated potassium gates open c. voltage-gated sodium gates close d. sodium–potassium pumps stop operating
Neurotransmitters are released from neurons due to the opening of ____________.
Select one:
a.
voltage gated Na channels
b.
voltage gated K channels
c.
voltage gated Ca channles
d.
voltage gated Cl channels
e.
voltage gated proton channels
A(n) ________ neuron has one axon and one dendrite extending directly from the cell body. a. unipolar b. bipolar c. multipolar d. pseudounipolar
Chapter 12 Solutions
EBK ANATOMY & PHYSIOLOGY: THE UNITY OF
Ch. 12.1 - Prob. 1BYGOCh. 12.1 - Prob. 2BYGOCh. 12.1 - Prob. 3BYGOCh. 12.1 - Prob. 1AYLOCh. 12.1 - Prob. 2AYLOCh. 12.1 - Prob. 3AYLOCh. 12.1 - Prob. 4AYLOCh. 12.2 - Prob. 4BYGOCh. 12.2 - Prob. 5BYGOCh. 12.2 - Prob. 6BYGO
Ch. 12.2 - Prob. 7BYGOCh. 12.2 - Prob. 1AYLOCh. 12.2 - Prob. 2AYLOCh. 12.2 - Prob. 3AYLOCh. 12.2 - Prob. 4AYLOCh. 12.2 - Prob. 5AYLOCh. 12.3 - Prob. 8BYGOCh. 12.3 - Prob. 9BYGOCh. 12.3 - Prob. 10BYGOCh. 12.3 - Prob. 1AYLOCh. 12.3 - Prob. 2AYLOCh. 12.3 - Prob. 3AYLOCh. 12.3 - Prob. 4AYLOCh. 12.4 - Prob. 11BYGOCh. 12.4 - Prob. 12BYGOCh. 12.4 - Prob. 13BYGOCh. 12.4 - Prob. 14BYGOCh. 12.4 - Prob. 15BYGOCh. 12.4 - Prob. 16BYGOCh. 12.4 - Prob. 17BYGOCh. 12.4 - Prob. 1AYLOCh. 12.4 - Prob. 2AYLOCh. 12.4 - Prob. 3AYLOCh. 12.4 - Prob. 4AYLOCh. 12.4 - Prob. 5AYLOCh. 12.4 - Prob. 6AYLOCh. 12.4 - Prob. 7AYLOCh. 12.4 - Prob. 8AYLOCh. 12.4 - Prob. 9AYLOCh. 12.5 - Prob. 18BYGOCh. 12.5 - Prob. 19BYGOCh. 12.5 - Prob. 20BYGOCh. 12.5 - Prob. 21BYGOCh. 12.5 - Prob. 1AYLOCh. 12.5 - Prob. 2AYLOCh. 12.5 - Prob. 3AYLOCh. 12.5 - Prob. 4AYLOCh. 12.5 - Prob. 5AYLOCh. 12.5 - Prob. 6AYLOCh. 12.5 - Prob. 7AYLOCh. 12.5 - Prob. 8AYLOCh. 12.5 - Prob. 9AYLOCh. 12.6 - Prob. 22BYGOCh. 12.6 - Prob. 23BYGOCh. 12.6 - Prob. 24BYGOCh. 12.6 - Prob. 25BYGOCh. 12.6 - Prob. 1AYLOCh. 12.6 - Prob. 2AYLOCh. 12.6 - Prob. 3AYLOCh. 12.6 - Prob. 4AYLOCh. 12.6 - Prob. 5AYLOCh. 12.6 - Prob. 6AYLOCh. 12.6 - Prob. 7AYLOCh. 12.6 - Prob. 8AYLOCh. 12.6 - Prob. 9AYLOCh. 12.6 - Prob. 10AYLOCh. 12.6 - Prob. 11AYLOCh. 12.6 - Prob. 12AYLOCh. 12.6 - Prob. 13AYLOCh. 12.6 - Prob. 14AYLOCh. 12 - The integrative functions of the nervous system...Ch. 12 - The highest density of voltage-gated ion channels...Ch. 12 - The soma of a mature neuron lacks a. a nucleus. b....Ch. 12 - The glial cells that fight infections in the CNS...Ch. 12 - Posttetanic potentiation of a synapse increases...Ch. 12 - An IPSP is_____of the postsynaptic neuron. a. a...Ch. 12 - Prob. 7TYRCh. 12 - Prob. 8TYRCh. 12 - Prob. 9TYRCh. 12 - Prob. 10TYRCh. 12 - Prob. 11TYRCh. 12 - Prob. 12TYRCh. 12 - Prob. 13TYRCh. 12 - Prob. 14TYRCh. 12 - Prob. 15TYRCh. 12 - A myelinated nerve fiber can produce action...Ch. 12 - Prob. 17TYRCh. 12 - Prob. 18TYRCh. 12 - Prob. 19TYRCh. 12 - Prob. 20TYRCh. 12 - Prob. 1BYMVCh. 12 - Prob. 2BYMVCh. 12 - Prob. 3BYMVCh. 12 - Prob. 4BYMVCh. 12 - Prob. 5BYMVCh. 12 - Prob. 6BYMVCh. 12 - Prob. 7BYMVCh. 12 - Prob. 8BYMVCh. 12 - Prob. 9BYMVCh. 12 - Prob. 10BYMVCh. 12 - Prob. 1TFCh. 12 - Prob. 2TFCh. 12 - Prob. 3TFCh. 12 - Prob. 4TFCh. 12 - Excitatory postsynaptic potentials lower the...Ch. 12 - Prob. 6TFCh. 12 - Prob. 7TFCh. 12 - Myelinated nerve fibers conduct signals more...Ch. 12 - Prob. 9TFCh. 12 - Prob. 10TFCh. 12 - Schizophrenia is sometimes treated with drugs such...Ch. 12 - Hyperkalemia is an excess of potassium ill the...Ch. 12 - Suppose a poison were to slow down the Na+-K+...Ch. 12 - Prob. 4TYCCh. 12 - Prob. 5TYC
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- Neurons contain ________, which can receive signals from other neurons. a. axons b. mitochondria c. dendrites d. Golgibodiesarrow_forwardWhen a neuron is at rest,_____ . a. it is at threshold potential b. voltage-gated sodium channels are open c. sodium–potassium pumps are operating d. it contains more sodium ions than the surrounding interstitial fluidarrow_forwardAction potentials are normally initiated at the axon hillock because a. there is a particularly high density of voltage-gated sodium channels there. b. threshold potential is lower there than at other sites along the plasma membrane. c. activation of sodium channels at the axon hillock results in a particularly strong inward current and consequent depolarization. d. all of these. e. none of these.arrow_forward
- Neurotransmitters are released by_____ . a. axon terminals c. dendrites b. a neuron cell body d. glial cellsarrow_forwardI. 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. Somaarrow_forwardChoose the item in column 2 that best matches each item in column 1 nodes of Ranvier resting membrane potential axon dendrite myelin sheath synapse nerve A. neuronal cell extension that propagates action potentials away from the cell body B. discontinuous insulation of an axon C. bundle of axons…arrow_forward
- VThe strengthening of synaptic connections by repetition is called _________ A.neuroplasticity B.neurogenesis C.apoptosis D.tuningarrow_forwardThe morphological difference between bipolar neurons and unipolar neurons is_ and that determines how they are classified. a. the type of neurotransmitter they contain b. one is a Golgi Type I and the other is a Golgi Type II c. the number of axons that they have d. the number of different types of neurotransmitters they contain e. none of the abovearrow_forwardMatch 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 knobarrow_forward
- When a neuron’s resting potential is occurring, the neuron is __________ charged on the inside. a. positively c. both positively and negatively b. negatively d. neutrallyarrow_forwardThe made-up drug leakyhose degrades myelin resulting in myelin becoming more porous and therefore a poor insulator. 2.) Which of the following would NOT be an effect of leakyhose? A. Propagation of the action potential would likely slow B. The action potential may degrade because it can’t properly be regenerated C. The action potential would not propagate but would rather reverse directions D. Saltatory conduction may be disrupted E. All of the above effects are consistent with the administration of leakyhosearrow_forwardEvent "D" in the diagram above is referred to as... O a. Polarization O b. Depolarization Oc. Refractory period d. Repolarization Use the following information to answer the next question Membrane potential (mv) Action potential of a neuron in response to a stimulus of -55 mV D A B Timearrow_forward
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