Biology

Nervous System and Neurons

1,164 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 primary cause of fibromyalgia, a chronic condition characterized by widespread pain and tenderness?

  1. Injury

  2. Autoimmune Disorder

  3. Genetics

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

The exact cause of fibromyalgia is unknown, but it is thought to involve a combination of genetic, environmental, and psychological factors.

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 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 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.

Multiple choice

What is the primary physiological signal measured by transcranial magnetic stimulation (TMS)?

  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

TMS involves applying magnetic pulses to the brain, which can temporarily disrupt neuronal activity and induce electrical responses in nearby neurons.

Multiple choice

What is the term for the process of strengthening synaptic connections between neurons?

  1. Long-term potentiation (LTP)

  2. Long-term depression (LTD)

  3. Synaptic pruning

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

LTP is a process that strengthens synaptic connections between neurons, leading to increased signal transmission.

Multiple choice

What is the term for the process of weakening synaptic connections between neurons?

  1. Long-term potentiation (LTP)

  2. Long-term depression (LTD)

  3. Synaptic pruning

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

LTD is a process that weakens synaptic connections between neurons, leading to decreased signal transmission.

Multiple choice

What is the significance of Marmas in Varma Adi?

  1. Vital Points

  2. Energy Channels

  3. Nerve Centers

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

Marmas are vital points in the human body that are believed to be connected to energy channels and nerve centers. Varma Adi practitioners aim to manipulate these points to achieve desired effects.

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 not sensory receptors. They are nerve endings that respond to pain.

Multiple choice

What are the four main types of sensory receptors?

  1. Mechanoreceptors, thermoreceptors, photoreceptors, and chemoreceptors

  2. Mechanoreceptors, thermoreceptors, photoreceptors, and nociceptors

  3. Mechanoreceptors, thermoreceptors, photoreceptors, and proprioceptors

  4. Mechanoreceptors, thermoreceptors, photoreceptors, and interoceptors
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The four main types of sensory receptors are mechanoreceptors, thermoreceptors, photoreceptors, and chemoreceptors.

Multiple choice

What is the mechanism by which electrical stimulation of the vagus nerve promotes tissue regeneration?

  1. By activating the release of growth factors

  2. By reducing inflammation

  3. By enhancing cell migration

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

Electrical stimulation of the vagus nerve promotes tissue regeneration by activating the release of growth factors, reducing inflammation, and enhancing cell migration.

Multiple choice

Which neurotransmitter is primarily responsible for transmitting signals between neurons?

  1. Acetylcholine

  2. Glutamate

  3. Dopamine

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

Glutamate is the primary excitatory neurotransmitter in the brain. It is responsible for transmitting signals between neurons, facilitating communication and information processing within the nervous system.