MEDICAL PHYSIOLOGY

PHYSIOLOGY

SYNAPTIC PHYSIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Dendrites are-
A
branched nerve fibers that convey local potential changes toward the cell body of a neuron.
B
the long threadlike part of a nerve cell along which impulses are conducted from the cell body to the axon terminal endings.
C
what controls the functions of the neuron.
D
what insulates the axon and helps impulses propagate faster.
Explanation: 

Detailed explanation-1: -A typical neuron has a cell body containing a nucleus, one or more branching filaments called dendrites which conduct nerve impulses towards the cell body and one long fibre, an axon, that carries the impulses away from it.

Detailed explanation-2: -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-3: -Dendrites are usually, but not always, short and branching, which increases their surface area to receive signals from other neurons. The number of dendrites on a neuron varies. They are called afferent processes because they transmit impulses to the neuron cell body.

Detailed explanation-4: -Dendrites (from Greek déndron, “tree"), also dendrons, are branched protoplasmic extensions of a nerve cell that propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project.

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