MEDICAL PHYSIOLOGY

PHYSIOLOGY

NEUROTRANSMISSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ send signals away from neurons whereas ____ receive signals from other neurons. Dendrites; axons Axons; synapses Synapses; dendrites Axons; dendrites
A
dendrites; axons
B
synapses; axons
C
synapses; dendrites
D
axons; dendrites
Explanation: 

Detailed explanation-1: -In a neuron or a nerve cell, the impulse travels through the axon towards the axonite. The dendrite of the receiving neuron picks up this impulse which is again transferred to another neuron or a cell. Hence, axon transfers the signal/impulse and the dendrite receives the impulse from other neurons.

Detailed explanation-2: -An axon is a long single fiber that transmits messages from the cell body to the dendrites of other neurons or to other body tissues, such as muscles. A protective covering called the myelin sheath, covers most neurons. Myelin insulates the axon and helps nerve signals travel faster and farther.

Detailed explanation-3: -Dendrite – The receiving part of the neuron. Dendrites receive synaptic inputs from axons, with the sum total of dendritic inputs determining whether the neuron will fire an action potential.

Detailed explanation-4: -The dendrites serve to receive incoming electrical signals from other neurons. Most neurons have a single axon to transmit outgoing signals. Axons vary in length from micrometers to over a meter. Portions of the axon are insulated by supporting cells with myelin, a phospolipid membrane.

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