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 process by which the brain eliminates weak or unused synaptic connections?

  1. Neuroplasticity

  2. Synaptogenesis

  3. Long-term potentiation

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

Synaptic pruning is the process by which the brain eliminates weak or unused synaptic connections, optimizing neural circuitry and enhancing efficiency.

Multiple choice

What is the term for the formation of new neurons in the brain?

  1. Neuroplasticity

  2. Synaptogenesis

  3. Long-term potentiation

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

Neurogenesis is the process by which new neurons are formed in the brain, primarily in certain regions such as the hippocampus.

Multiple choice

Which of the following is not a function of the peripheral nervous system?

  1. Sensory perception

  2. Motor control

  3. Homeostasis

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

Cognition is a function of the central nervous system, not the peripheral nervous system.

Multiple choice

The peripheral nervous system is divided into two main parts. Which of the following is not one of them?

  1. Somatic nervous system

  2. Autonomic nervous system

  3. Central nervous system

  4. Enteric nervous system
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The central nervous system is not a part of the peripheral nervous system.

Multiple choice

The somatic nervous system is responsible for:

  1. Controlling voluntary muscle movement

  2. Regulating heart rate

  3. Digesting food

  4. Controlling blood pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The somatic nervous system is responsible for controlling voluntary muscle movement.

Multiple choice

The autonomic nervous system is divided into two branches. Which of the following is not one of them?

  1. Sympathetic nervous system

  2. Parasympathetic nervous system

  3. Enteric nervous system

  4. Somatic nervous system
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The somatic nervous system is not a branch of the autonomic nervous system.

Multiple choice

The sympathetic nervous system is responsible for:

  1. Preparing the body for "fight or flight"

  2. Conserving energy

  3. Digesting food

  4. Controlling blood pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sympathetic nervous system is responsible for preparing the body for "fight or flight".

Multiple choice

The parasympathetic nervous system is responsible for:

  1. Conserving energy

  2. Preparing the body for "fight or flight"

  3. Digesting food

  4. Controlling blood pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The parasympathetic nervous system is responsible for conserving energy.

Multiple choice

Which of the following is not a type of peripheral nerve?

  1. Sensory nerve

  2. Motor nerve

  3. Mixed nerve

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

Autonomic nerves are not a type of peripheral nerve.

Multiple choice

Sensory nerves are responsible for:

  1. Carrying sensory information from the body to the brain

  2. Carrying motor commands from the brain to the body

  3. Controlling digestion

  4. Regulating heart rate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sensory nerves are responsible for carrying sensory information from the body to the brain.

Multiple choice

Motor nerves are responsible for:

  1. Carrying motor commands from the brain to the body

  2. Carrying sensory information from the body to the brain

  3. Controlling digestion

  4. Regulating heart rate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Motor nerves are responsible for carrying motor commands from the brain to the body.

Multiple choice

Mixed nerves contain both:

  1. Sensory and motor fibers

  2. Sensory and autonomic fibers

  3. Motor and autonomic fibers

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

Mixed nerves contain both sensory and motor fibers, as well as sensory and autonomic fibers.

Multiple choice

The peripheral nervous system is responsible for:

  1. Connecting the central nervous system to the rest of the body

  2. Controlling voluntary muscle movement

  3. Regulating heart rate

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

The peripheral nervous system is responsible for connecting the central nervous system to the rest of the body, controlling voluntary muscle movement, and regulating heart rate.

Multiple choice

Which branch of the autonomic nervous system is responsible for the 'fight-or-flight' response?

  1. Sympathetic

  2. Parasympathetic

  3. Enteric

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

The sympathetic branch of the autonomic nervous system is responsible for the 'fight-or-flight' response, which prepares the body for physical exertion and increases arousal.

Multiple choice

What is the term for the tumor that arises from the nerve that connects the inner ear to the brain?

  1. Otosclerosis

  2. Ménière's disease

  3. Acoustic neuroma

  4. Perilymph fistula
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acoustic neuroma is the tumor that arises from the nerve that connects the inner ear to the brain.