Biology

Nervous System and Neurons

1,224 Questions

The nervous system and neurons section covers the structural and functional aspects of the human nervous system. Topics include nerve fibers, the myelin sheath, and sympathetic nervous system functions. This material is crucial for general science preparation in various competitive exams.

Neuron structureMyelin sheath productionSympathetic nervous systemCranial and spinal nervesParasympathetic functions

Nervous System and Neurons Questions

Multiple choice

What is the significance of axonal regeneration in nerve repair?

  1. Restoring Neural Connectivity

  2. Promoting Functional Recovery

  3. Preventing Neurodegeneration

  4. All of the Above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Axonal regeneration is crucial for nerve repair as it enables the restoration of neural connectivity, promotes functional recovery, and prevents neurodegeneration.

Multiple choice

Which cell type is responsible for myelin production in the central nervous system?

  1. Oligodendrocytes

  2. Schwann Cells

  3. Astrocytes

  4. Microglia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oligodendrocytes are the primary cells responsible for myelin production in the central nervous system, forming the myelin sheath around axons.

Multiple choice

Which surgical procedure involves the transplantation of peripheral nerve segments to bridge gaps in damaged nerves?

  1. Nerve Grafting

  2. Nerve Transfer

  3. Neurolysis

  4. Neurectomy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nerve grafting involves transplanting a segment of healthy nerve from one part of the body to bridge gaps in damaged nerves, promoting nerve regeneration.

Multiple choice

Which type of neural stem cell is found in the adult brain and spinal cord?

  1. Radial Glial Cells

  2. Subventricular Zone Cells

  3. Hippocampal Neural Stem Cells

  4. All of the Above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radial glial cells, subventricular zone cells, and hippocampal neural stem cells are all types of neural stem cells found in the adult brain and spinal cord, contributing to neurogenesis and tissue repair.

Multiple choice

What is the term for a surgical procedure that involves repairing a nerve injury?

  1. Neurorrhaphy

  2. Laminectomy

  3. Discectomy

  4. Craniotomy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neurorrhaphy is a surgical procedure that involves repairing a nerve injury. It is typically performed by suturing the severed nerve ends together to restore nerve function.

Multiple choice

What is the basic unit of a neural network?

  1. Neuron

  2. Synapse

  3. Dendrite

  4. Axon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A neuron is the basic unit of a neural network. It receives inputs from other neurons, processes them, and produces an output.

Multiple choice

Which of the following is not a part of the nervous system of a chicken?

  1. Brain

  2. Spinal cord

  3. Nerves

  4. Muscles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Muscles are part of the muscular system, not the nervous system.

Multiple choice

Which of the following is NOT a type of mechanoreceptor?

  1. Tactile receptors

  2. Proprioceptors

  3. Thermoreceptors

  4. Photoreceptors
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photoreceptors are sensory cells that respond to light. They are not mechanoreceptors, which are sensory cells that respond to mechanical stimuli such as touch, pressure, and vibration.

Multiple choice

Which of the following is NOT a type of olfactory receptor cell?

  1. Rods

  2. Cones

  3. Bipolar cells

  4. Olfactory sensory neurons
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rods are photoreceptor cells in the retina, not olfactory receptor cells. Olfactory sensory neurons are the primary sensory cells responsible for detecting odors.

Multiple choice

How does MS affect the body?

  1. It causes inflammation and damage to the myelin sheath, which insulates nerve fibers

  2. It causes the immune system to attack and destroy nerve cells

  3. It causes the brain and spinal cord to shrink

  4. It causes the muscles to weaken and atrophy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

MS causes inflammation and damage to the myelin sheath, which insulates nerve fibers. This damage disrupts the transmission of nerve signals, which can lead to a variety of symptoms, including muscle weakness, fatigue, numbness, tingling, and difficulty with balance and coordination.

Multiple choice

Which of the following is NOT a type of sensory receptor?

  1. Photoreceptor

  2. Mechanoreceptor

  3. Thermoreceptor

  4. Nociceptor

  5. Vestibular receptor
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Vestibular receptors are not sensory receptors, but rather organs of balance located in the inner ear.

Multiple choice

Which of the following is NOT a type of pain receptor?

  1. Nociceptor

  2. Mechanoreceptor

  3. Thermoreceptor

  4. Photoreceptor

  5. Vestibular receptor
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Photoreceptors are not pain receptors, but rather sensory receptors responsible for detecting light.

Multiple choice

Which of the following is NOT a type of sensory neuron?

  1. Photoreceptor

  2. Mechanoreceptor

  3. Thermoreceptor

  4. Nociceptor

  5. Vestibular neuron
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Vestibular neurons are not sensory neurons, but rather neurons involved in the vestibular system.

Multiple choice

What is the basic unit of a neural network?

  1. Neuron

  2. Synapse

  3. Dendrite

  4. Axon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A neuron is the basic unit of a neural network, responsible for processing information and transmitting it to other neurons.

Multiple choice

What is the primary physiological signal measured by electroencephalography (EEG)?

  1. Electrical activity of neurons

  2. Magnetic fields generated by neurons

  3. Changes in blood oxygenation levels

  4. Electrical activity of muscles
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

EEG measures the electrical activity of neurons in the brain, typically from the scalp.