44) The letters below stand for the following terms: A- Axon D Dendrite S-Synaps
ID: 3515671 • Letter: 4
Question
44) The letters below stand for the following terms: A- Axon D Dendrite S-Synapse CB-Cell Body Thus, a typical sequence of structures between a receptor and an effector ls a. D-CB-A-S-D-CB-A b. A-D-CB-S-A-D-CEB c. D-CB-A-S-A-CB-D d. D-A-S-CB-D-A-CB 45) You have set up 2 electrical recording instruments that will record any electrical changes that occur. One is placed at each end of a single neuron 10 cm long. If at the first pair of electrodes, the magnitude of the action potential is recorded at 100 mV, what will be the end? magnitude of the action potential when it reaches the second pair of electrodes at the other a. 10 mV b. less than 100 mV but cannot be more exact c. 100 mv d. pore than 100 mV but cannot be more exact e. 1000 mV 46-50 refers to the diagram below. -70 -90 Milliseconds 46) What is the resting potential? a. +50mV b. 0mV c. -50mV d. -70mV 47) What is the threshold potential? b. OmV a. +50mV c. -50mV d. -70mV 48) During which interval (a,b,c,d,e) would the transmitter substance be active? 49) During which interval would Na ions be entering the neuron?_ 50) During which interval would k ions be leaving the neuron?Explanation / Answer
Question 44
Answer is A
D- CB - A - S - D - CB - A
The dendrite acts as inputs for the signals and axons are the outputs to the signals.
The sequence events are
Signals from Dendrites to Cell body to Axon to Synapse to Dendrites to the cell body to the axon.
Question 45
Answer is C
The magnitude of an action potential is 100 mV that is from -70 mV to +30 mV. The magnitude of action potential does not vary throughout the length of the neuron.
Question 46- 50
46.
Answer is D
-70 mV. The resting membrane potential.
47. Answer is C
-50 mV, the threshold potential.
48. Answer is b interval the transmitter substance is active.
49. Answer is b-c interval sodium ions enter into neuron (depolarization)
50. Anser is d-e interval potassium ions leaving the neuron (repolarization)
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