XI - CH - 21 - Neuron - Part - 1

The two major divisions of human neural system are

• A) CNS and brain

• B) ANS and PNS

• C) CNS and PNS

• D) Brain and spinal cord

The major structural component of peripheral nervous system is

• A) spinal cord

• B) nerves

• C) visceral organs

• D) all of these

The nerve fibres of PNS are

• A) afferent

• B) efferent

• C) both afferent and efferent

• D) only motor

The basic structural components of a neuron are

• A) cell body and axon

• B) cell body and dendrites

• C) axon and dendrites

• D) cell body, axon and dendrites

The only similarity between the cell body and dendrites is the presence of

• A) golgi bodies

• B) Nissl’s granules

• C) nucleus

• D) mitochondria

A neuron with one axon and one dendrite is known

• A) unipolar

• B) bipolar

• C) nonpolar

• D) multipolar

A multipolar neuron contains multiple

• A) dendrites

• B) axons

• C) axons and dendrites

• D) synaptic bulbs

The myelinated neurons are found in

• A) cranial nerves

• B) spinal nerves

• C) nerves of ANS

• D) cranial and spinal nerves

Synapse is a junction between

• A) two neurons

• B) CNS and PNS

• C) spinal cord and nerves

• D) cell body and axon

The chemicals found in the synaptic cleft are known as

• A) prohormones

• B) hormones

• C) neurotransmitters

• D) proenzymes