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BIO 201 RIO SALADO EXAM 3/ BIO 2O1
ANATOMY AND PHYSIOLOGY NEWEST 2 025
ACTUAL EXAM COMPLETE 100 QUESTIONS
AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
(BRAND NEW VERSION!)
Myelination of the nerve fibers in the central nervous system is the job of the oligodendrocyte. T/F the correct answer is True If bacteria invaded the CNS tissue, microglia would migrate to the area to engulf and destroy them. T/F the correct answer is True Neurons in the CNS are organized into functional groups. T/F the correct answer is True Efferent nerve fibers may be described as motor nerve fibers.T/F the correct answer is True Voltage is always measured between two points and may be called the potential between these two points. T/F the correct answer is True The all-or-none phenomenon as applied to nerve conduction states that the whole nerve cell must be stimulated for conduction to take place. T/F
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the correct answer is False. The all-or-none phenomenon states that the action potential either happens completely or it doesn't happen at all.Enkephalins and endorphins are peptides that act like morphine.T/F the correct answer is True Action potentials can be generated by virtually all cells of the body because all cells possess cell membranes. T/F the correct answer is False. Only cells with excitable membranes, such as neurons and muscle cells, can generate action potentials.Acetylcholine is not a biogenic amine. T/F the correct answer is True In myelinated axons the voltage-gated sodium channels are concentrated at the nodes of Ranvier. T/F the correct answer is True During depolarization, the inside of the neuron's membrane becomes less negative. T or F the correct answer is True A graded potential that is the result of a neurotransmitter released into the synapse between two neurons is called a postsynaptic potential. T or F the correct answer is True
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Strong stimuli cause the amplitude of action potentials generated to increase. T or F the correct answer is False. As stated in the all-or-none phenomenon, an action potential occurs either completely or it doesn't happen.A synapse formed between the axonal ending of one neuron and the cell body of another neuron is called an axosomatic synapse.T or F the correct answer is True The two major classes of graded potentials are transmitter potentials and receptor potentials. T or F the correct answer is False. The two classes of graded potentials are generator potentials and post-synaptic potentials A stimulus traveling toward a synapse appears to open calcium channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane. T or F the correct answer is True Sensory neurons have long dendrites, while motor neurons have long axons. T or F the correct answer is True Large-diameter nerve fibers conduct impulses much faster than small-diameter fibers. T/F the correct answer is True
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Saltatory conduction occurs because of the presence of salt (NaCl) around the neuron. T or F the correct answer is False. Saltatory conduction refers to the signal jumping from node to node along the axon.The nodes of Ranvier are found only on myelinated, peripheral neural processes. T or F the correct answer is True A positive feedback cycle is the main force in the generation of graded potentials at receptor ends. T or F the correct answer is False. Positive feedback occurs after depolarization begins.Cell bodies of sensory neurons are located in ganglia lying outside the central nervous system. T or F the correct answer is True The oligodendrocytes can myelinate several axons. T or F the correct answer is True What component of the neuron conducts impulses toward the nerve cell body?the correct answer is Dendrites Where are neurotransmitters released from?the correct answer is Axon Terminal What component of the neuron conducts impulses away from the cell body?