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 role of aging in synaptogenesis?

  1. It can lead to a decrease in the number of synapses

  2. It can lead to a decrease in the strength of synapses

  3. It can lead to a change in the location of synapses

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

Aging plays a role in all three aspects of synaptogenesis: it can lead to a decrease in the number of synapses, it can lead to a decrease in the strength of synapses, and it can lead to a change in the location of synapses.

Multiple choice

What is the role of injury in synaptogenesis?

  1. It can lead to a decrease in the number of synapses

  2. It can lead to a decrease in the strength of synapses

  3. It can lead to a change in the location of synapses

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

Injury plays a role in all three aspects of synaptogenesis: it can lead to a decrease in the number of synapses, it can lead to a decrease in the strength of synapses, and it can lead to a change in the location of synapses.

Multiple choice

What is the role of stress in synaptogenesis?

  1. It can lead to a decrease in the number of synapses

  2. It can lead to a decrease in the strength of synapses

  3. It can lead to a change in the location of synapses

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

Stress plays a role in all three aspects of synaptogenesis: it can lead to a decrease in the number of synapses, it can lead to a decrease in the strength of synapses, and it can lead to a change in the location of synapses.

Multiple choice

Which neurotransmitter is responsible for transmitting signals between neurons?

  1. Dopamine

  2. Serotonin

  3. Glutamate

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

Glutamate is the neurotransmitter responsible for transmitting signals between neurons.

Multiple choice

Which of the following is an example of a sensory receptor?

  1. Photoreceptors

  2. Mechanoreceptors

  3. Thermoreceptors

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

Sensory receptors are specialized cells that convert sensory information into electrical signals that can be interpreted by the brain. Photoreceptors are sensory receptors that respond to light, mechanoreceptors are sensory receptors that respond to mechanical stimuli, and thermoreceptors are sensory receptors that respond to temperature.

Multiple choice

Which of the following is not a sensory system?

  1. Vision

  2. Hearing

  3. Smell

  4. Taste

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

Memory is not a sensory system. It is a cognitive process that allows us to store and retrieve information.

Multiple choice

Which of the following is not a type of mechanoreceptor?

  1. Hair cells

  2. Pacinian corpuscles

  3. Meissner's corpuscles

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

Thermoreceptors are not mechanoreceptors. They are sensory receptors that respond to changes in temperature.

Multiple choice

Which of the following is not a type of proprioceptive receptor?

  1. Muscle spindles

  2. Golgi tendon organs

  3. Joint receptors

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

Vestibular receptors are not proprioceptive receptors. They are sensory receptors that help us to maintain balance.

Multiple choice

Which of the following is not a type of nociceptor?

  1. Free nerve endings

  2. Nociceptors

  3. Thermoreceptors

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

Thermoreceptors are not nociceptors. They are sensory receptors that respond to changes in temperature.

Multiple choice

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

  1. Brain

  2. Spinal cord

  3. Nerves

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

The heart is part of the cardiovascular system, not the central nervous system.

Multiple choice

Which of the following is a type of motor neuron?

  1. Alpha motor neuron

  2. Beta motor neuron

  3. Gamma motor neuron

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

Alpha, beta, and gamma motor neurons are all types of motor neurons.

Multiple choice

What is the resting membrane potential of a neuron?

  1. -70 mV

  2. -50 mV

  3. -30 mV

  4. -10 mV
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The resting membrane potential of a neuron is typically around -70 mV, which is the difference in electrical potential between the inside and outside of the neuron.

Multiple choice

What is the role of neurotransmitters in neural signaling?

  1. To transmit signals between neurons

  2. To regulate the release of hormones

  3. To control the excitability of the neuron

  4. To generate action potentials
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neurotransmitters are chemical messengers that are released by neurons to transmit signals to other neurons, muscles, or glands.

Multiple choice

The somatic nervous system is divided into how many parts?

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The somatic nervous system is divided into two parts: the afferent division and the efferent division.

Multiple choice

What is the function of the afferent division of the somatic nervous system?

  1. Sending sensory information to the brain and spinal cord

  2. Sending motor commands from the brain and spinal cord to the muscles

  3. Controlling the heart rate

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

The afferent division of the somatic nervous system is responsible for sending sensory information, such as touch, pain, and temperature, from the body to the brain and spinal cord.