MEDGAR EVERS COLLEGE OF THE CITY OF NEW YORK DEPARTMENT OF BIOLOGY STUDENT: Ahli

Question

MEDGAR EVERS COLLEGE OF THE CITY OF NEW YORK DEPARTMENT OF BIOLOGY STUDENT: Ahlia SS #: Stephens- . CLASS: BIO 252-050 EXAMINATION H QUESTIONS ARE MULTIPLE CHOICE. CIRCLE THE CORRECT ANSWER. Nissl bodies are in theof a neuron a soma b. dendrite c. myelin sheath d. telodendria e. synaptic knobs The resting potential of a neuron is approximately a. 70 microvolts /6)-70 millivolts c. 70 volts d. 70 electrovolts e. 70 megavolts e neuron doctrine refers to the fact that a. action potentials are all-or-none b. neurons do not fire unless they reach threshold c. neurons are organized into functional groups called neuronal pools d. nerve signals pass from neuron to neuron over junctions called sna e. once an action potential begins, it cannot be stopped

Explanation / Answer

1.Nissl bodies are in the soma of a neuron.

Thee are of rough endoplasmic reticulum with free ribosomes, where the protein synthesis takes place. These are present in the cell body.

2. the resting potential of a neuron is approximately -70 millivolts.

At rest, sodium ions are comparatively more out side the neuron. Whereas potassium ions are higher inside the neuron.

3. the neuron doctrine refers to the fact that

Nerve signals pass from neuron to neuron over junctions called synapsis.

Neuron doctrine is the concept that proposed that nervous system is made up of different individual cells and these cells are interconnected via synapses to form nervous system.

However, all the statements are true. Neural doctrine refers to the cells and their organization through synapses.

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