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

Which region of the spinal cord is responsible for transmitting motor signals from the brain to the muscles?

  1. Dorsal horn

  2. Ventral horn

  3. Lateral horn

  4. Central canal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The ventral horn of the spinal cord contains motor neurons that transmit signals from the brain to the muscles, enabling voluntary movement.

Multiple choice

What is the name of the protective covering surrounding the spinal cord?

  1. Meninges

  2. Myelin sheath

  3. Dura mater

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

The meninges, consisting of three layers (dura mater, arachnoid mater, and pia mater), protect and support the spinal cord.

Multiple choice

Which of the following is NOT a type of neuron found in the spinal cord?

  1. Motor neurons

  2. Sensory neurons

  3. Interneurons

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

Astrocytes are not neurons but glial cells that provide support and nourishment to neurons in the central nervous system.

Multiple choice

Which part of the spinal cord is responsible for transmitting sensory signals from the body to the brain?

  1. Dorsal horn

  2. Ventral horn

  3. Lateral horn

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

The dorsal horn of the spinal cord contains sensory neurons that receive and transmit sensory information from the body to the brain.

Multiple choice

What is the term for the process by which nerve impulses are transmitted along the spinal cord?

  1. Conduction

  2. Synapsis

  3. Neurotransmission

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

Conduction is the process by which nerve impulses are transmitted along the spinal cord through the axons of neurons.

Multiple choice

What is the term for the protective layer surrounding the individual nerve fibers in the spinal cord?

  1. Myelin sheath

  2. Neurilemma

  3. Schwann cells

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

The myelin sheath is a fatty layer that surrounds the axons of neurons in the spinal cord, providing insulation and increasing the speed of nerve impulse conduction.

Multiple choice

Which of the following is NOT a function of the spinal cord?

  1. Reflex actions

  2. Voluntary movement

  3. Temperature regulation

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

Hormone production is not a function of the spinal cord.

Multiple choice

Which of the following is NOT a part of the central nervous system?

  1. Brain

  2. Spinal cord

  3. Nerves

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

Sensory receptors are part of the peripheral nervous system, not the central nervous system.

Multiple choice

Which of the following is NOT a type of neuron?

  1. Sensory neuron

  2. Motor neuron

  3. Interneuron

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

Glial cells are not neurons, but rather cells that support and protect neurons.

Multiple choice

The process by which sensory receptors convert stimuli into electrical signals is called:

  1. Transduction

  2. Synapsis

  3. Action potential

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

Transduction is the process by which sensory receptors convert stimuli into electrical signals.

Multiple choice

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

  1. Photoreceptor

  2. Mechanoreceptor

  3. Thermoreceptor

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

Nociceptors are pain receptors, not sensory receptors.

Multiple choice

The process by which information is transmitted from one neuron to another is called:

  1. Synapsis

  2. Action potential

  3. Neurotransmission

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

Synapsis is the process by which information is transmitted from one neuron to another.

Multiple choice

Which of the following is NOT a part of the peripheral nervous system?

  1. Nerves

  2. Sensory receptors

  3. Spinal cord

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

The brain is part of the central nervous system, not the peripheral nervous system.

Multiple choice

Which of the following is a part of the nervous system?

  1. Brain

  2. Spinal cord

  3. Nerves

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

The nervous system consists of the brain, spinal cord, and nerves.

Multiple choice

What is the term for the strengthening of synaptic connections between neurons as a result of repeated activation?

  1. Long-term potentiation

  2. Long-term depression

  3. Synaptic pruning

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

Long-term potentiation (LTP) is a process by which synaptic connections between neurons are strengthened through repeated activation, leading to enhanced signal transmission.