Tag: structure of neuron

Questions Related to structure of neuron

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

The function of an axon is 

  1. Transformation of nerve impulse

  2. Reception of stimuli from neurons

  3. Reception of external stimuli

  4. Conduction of nerve impulse

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An axon is also known as a nerve fiber. It is a long, slender projection of a nerve cell, or neuron, that conducts electrical impulses away from the neuron's cell body. The function of the axon is to transmit information to different neurons, muscles and glands.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

What used to be described as Nissl granules in a nerve cell are now identified as?

  1. Cell metabolites

  2. Fat granules

  3. Ribosomes

  4. Mitochondria

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A Nissl granule is a large granular body found in neurons. These granules are rough endoplasmic reticulum (RER) with rosettes of free ribosomes and are the site of protein synthesis.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Dendrites are associated with which system?

  1. Nervous system

  2. Digestive system

  3. Muscular system

  4. Blood vascular system

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dendrites are the branched projections of a neuron, that act to propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Nissl granules are found in 

  1. Liver cells

  2. Nerve cells

  3. Kidney

  4. Heart

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A Nissl body is also known as Nissl or tigroid substance. It is a large granular body found in neurons. These granules are rough endoplasmic reticulum (RER) with rosettes of free ribosomes and are the sites of protein synthesis.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

"Nodes of Ranvier" are found in 

  1. Brain

  2. Heart

  3. Axon

  4. Eye

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The node of Ranvier is a periodic gap in the insulating sheath on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses. These interruptions in the myelin covering were first discovered in 1878 by French histologist and pathologist Louis Antoine Ranvier, who describes the nodes as constrictions. They are present in myelinated nerves.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

Power of regeneration is lowest in 

  1. Brain cell

  2. Liver cell

  3. Bone cell

  4. Muscle cell

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. In a typical human, the cerebral cortex is estimated to contain 15-33 billion neurons, each connected by synapses to several thousand other neurons. These  neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells. These brain cells are the only cells which do not have the ability to regenerate.

Therefore, the correct answer is option A.

Multiple choice biology plant and animal tissues nervous system in animals structure of neuron structure and function of neuron

What is the function of neuron?

  1. It helps in conducting impulses.

  2. It helps in regulating control and coordination in the animals.

  3. Both A and B.

  4. None of the above.

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A neuron is an electrically excitable cell. It processes and transmits information through electrical and chemical signals. These signals between neurons occur via synapses, specialized connections with other cells. Neurons can connect to each other to form neural networks. Neurons are the core components of the nervous system, which includes the brain, spinal cord which together comprise the central nervous system (CNS) and the ganglia of the peripheral nervous system (PNS). Specialized types of neurons include: sensory neurons which respond to touch, sound, light and all other stimuli affecting the cells of the sensory organs that then send signals to the spinal cord and brain, motor neurons that receive signals from the brain and spinal cord to cause muscle contractions and affect glandular outputs and interneurons which connect neurons to other neurons within the same region of the brain or spinal cord in neural networks.
Therefore, the correct answer is option C.