Tag: structure of neuron

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Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Neurons have a unique property that makes them to communicate with other cells via

  1. Nerve code

  2. Glacial cells

  3. Synapses

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

Synapse is a gap between two neurons which is filled with a neurotransmitter such as acetylcholine. It functions to transfer one neuronal signal to other by acting as a bridge. It allows the electrical signal to be converted into a chemical signal. So, the correct answer is option C.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

The gap between two neurons is known as

  1. Dendrite

  2. Synapse

  3. Axon

  4. Impulse
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Neuron is the structural and functional unit of nervous system. It consists of dendrites, axon and soma. Dendrites are the small extension of nerve cells that receives signals from sensory receptors or other neurons.
The long extension of cell body of nerve cell is called as axon that serves to conduct the nerve impulse away from the cell body.
Two neurons are never physically connected to each other and synapse place where two neurons are in close connection to facilitate transmission of information from one neuron to the next one.
The extracellular space between two neurons is known as synaptic cleft. Nerve impulse is all or none response of nerve fibres and is defined as wave of change in polarity of neuron membrane, caused by movement of ions across the membrane.
So, the correct answer is option B. 
Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Which of the following chemical is released in synapse?

  1. Acetylcholine

  2. Choline

  3. Acetyl CoA

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

Neurotransmitters are the chemicals that transmit the nerve impulse across the synapse. Acetylcholine is the neurotransmitter produced by cholinergic neuron. It is secreted by both pre- and post-ganglionic parasympathetic cholinergic neurons in synapse.

Thus, the correct answer is option A.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

The word synapse was coined in 

  1. 1897

  2. 1997

  3. 1797

  4. 1957
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The term synapse was first introduced in 1897 by neurophysiologist Charles Sherrington. The gap between two neurons across which impulses are conducted is known as a synapse. Synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell. It is important for neuronal function. 
Thus, the correct answer is option A.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

A place where a signal passes from one nerve cell to next is described as 

  1. Synaptic cleft

  2. Synapsis

  3. Synapse

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

The gap between two neurons across which impulses are conducted is known as a synapse. Synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell. It is important for neuronal function. 
Thus, the correct answer is option C.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Which structure of nervous system permits a neuron to pass impulse to another neuron?

  1. Nerve fiber

  2. Dendrites

  3. Synapse

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

The gap between two neurons across which impulses are conducted is known as a synapse. Synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell. It is important for neuronal function. 
Thus, the correct answer is option C.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Which of the following is the component of the synapse?

  1. Presynaptic component

  2. Postsynaptic component

  3. Both A and B

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

The gap between two neurons across which impulses are conducted is known as a synapse. The presynaptic is the region of the axonic end of one neuron and the post synaptic is the dendritic end of the other neuron. It is a structure that permits a neuron to pass an electrical or chemical signal to another cell and acts as a communication point between the neuron and the target organ. 
Thus, the correct answer is option C.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

The point of communication and target cell is

  1. Synapse

  2. Nodes of Ranvier

  3. Dendrites

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

The gap between two neurons across which impulses are conducted is known as a synapse. The presynaptic is the region of the axonic end of one neuron and the post synaptic is the dendritic end of the other neuron. It is a structure that permits a neuron to pass an electrical or chemical signal to another cell and acts as a communication point between the neuron and the target organ. It is important for neuronal function. The nerve impulses are transmitted and received with the help of this regions. 
Thus, the correct answer is option A.

Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Presynaptic ending contains 

  1. Mitochondria

  2. Lysosomes

  3. Centrioles

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The synapse consists of :
1) presynaptic ending that contains neurotransmitters, and supporting cell organelles like mitochondria and endoplasmic reticulum. 
2) postsynaptic ending contains receptor sites for neurotransmitters. and 3)synaptic cleft is the space between the presynaptic and postsynaptic endings.
The function of mitochondria in presynaptic endings is the calcium homeostasis.
  • Hence Presynaptic ending contains Mitochondria.
  • So, the correct answer is 'Mitochondria'.