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

The sympathetic nervous system is responsible for which of the following?

  1. Rest and Digest

  2. Fight or Flight

  3. Homeostasis

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sympathetic nervous system is responsible for the body's fight or flight response. This response is characterized by increased heart rate, blood pressure, and respiration, as well as decreased digestion and salivation.

Multiple choice

The parasympathetic nervous system is responsible for which of the following?

  1. Rest and Digest

  2. Fight or Flight

  3. Homeostasis

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The parasympathetic nervous system is responsible for the body's rest and digest response. This response is characterized by decreased heart rate, blood pressure, and respiration, as well as increased digestion and salivation.

Multiple choice

The enteric nervous system is responsible for which of the following?

  1. Controlling the digestive system

  2. Controlling the heart and lungs

  3. Controlling the brain and spinal cord

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The enteric nervous system is a division of the autonomic nervous system that innervates and controls the digestive system. It is also known as the brain of the gut.

Multiple choice

Which of the following is NOT a function of the autonomic nervous system?

  1. Controlling voluntary movement

  2. Controlling thought and emotion

  3. Controlling breathing

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

The autonomic nervous system does not control voluntary movement. Voluntary movement is controlled by the somatic nervous system.

Multiple choice

The autonomic nervous system is divided into two branches: the sympathetic nervous system and the ________ nervous system.

  1. parasympathetic

  2. enteric

  3. somatic

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

The autonomic nervous system is divided into two branches: the sympathetic nervous system and the parasympathetic nervous system.

Multiple choice

The sympathetic nervous system is responsible for the body's ________ response.

  1. fight or flight

  2. rest and digest

  3. homeostasis

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sympathetic nervous system is responsible for the body's fight or flight response.

Multiple choice

The parasympathetic nervous system is responsible for the body's ________ response.

  1. fight or flight

  2. rest and digest

  3. homeostasis

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The parasympathetic nervous system is responsible for the body's rest and digest response.

Multiple choice

The enteric nervous system is responsible for controlling the ________ system.

  1. digestive

  2. respiratory

  3. circulatory

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

The enteric nervous system is responsible for controlling the digestive system.

Multiple choice

The autonomic nervous system is responsible for controlling ________ functions.

  1. voluntary

  2. involuntary

  3. both voluntary and involuntary

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The autonomic nervous system is responsible for controlling involuntary functions.

Multiple choice

What is the name of the process by which new neurons are generated in the brain?

  1. Neurogenesis

  2. Synaptogenesis

  3. Neuroplasticity

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

Neurogenesis is the process by which new neurons are generated in the brain. This process occurs in certain regions of the brain, such as the hippocampus, and is thought to be important for learning and memory.

Multiple choice

What is the name of the process by which synapses are strengthened or weakened?

  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 synapses are strengthened as a result of repeated stimulation. This process is thought to be important for learning and memory.

Multiple choice

What is the name of the process by which synapses are eliminated?

  1. Long-term potentiation

  2. Long-term depression

  3. Synaptic pruning

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

Synaptic pruning is the process by which synapses are eliminated. This process occurs during development and is thought to be important for refining neural circuits and improving efficiency.

Multiple choice

What is the name of the process by which the brain forms new connections between neurons?

  1. Neurogenesis

  2. Synaptogenesis

  3. Neuroplasticity

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

Synaptogenesis is the process by which the brain forms new connections between neurons. This process occurs throughout development and is thought to be important for learning and memory.

Multiple choice

Which of the following is not a type of synaptic plasticity?

  1. long-term potentiation

  2. long-term depression

  3. short-term potentiation

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

Retrograde signaling is a form of communication between neurons in which the postsynaptic neuron sends a signal back to the presynaptic neuron. This is in contrast to synaptic plasticity, which is a change in the strength of a synapse as a result of experience.

Multiple choice

What is the process by which new neurons are generated in the brain called?

  1. neurogenesis

  2. synaptogenesis

  3. long-term potentiation

  4. long-term depression
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neurogenesis is the process by which new neurons are generated in the brain. This process occurs in two regions of the brain: the hippocampus and the subventricular zone.