Tag: biology

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Questions Related to biology

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

A minute gap across which impulse pass by neurotransmitter is called as a 

  1. Cleft

  2. Synapse

  3. Nerve impulse

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

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

Area of coming together of two neuron ends or between a dendron and axon ends is?

  1. Junction

  2. Synapsis

  3. Synapses

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

  • In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target effector cell. 
  • Synapses are stabilized in position by synaptic adhesion molecules (SAMs) projecting from both the pre- and post-synaptic neuron and sticking together where they overlap. Hence. Area of coming together of two neuron ends or between a dendron and axon ends is synapses.
So, the correct answer is 'synapses'.

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

A small gap that helps neurotransmitter to pass nerve impulse is called as

  1. Neuron

  2. Synapse

  3. Ganglia

  4. None of the above
Reveal answer Fill a bubble to check yourself
B 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. 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
The junction between two neurons is called as a synapse.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction.

So, the correct answer is 'True'.
Multiple choice biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

In which region nerve impulses are transmitted and received? 

  1. Nodes of Ranvier

  2. Dendrites

  3. Axon

  4. Synapse
Reveal answer Fill a bubble to check yourself
D 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. 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 D.

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

Which of the following statements explain the meaning of synapse.

  1. Junction of two nerve cells.

  2. Junction of two muscle cells.

  3. Junction of two bone cells.

  4. Junction of two sperm cells.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Synapse, also called neuronal junction, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector)
  • . A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction. 

So, the correct answer is 'Junction of two nerve cells'.

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

What do will the microscope gap between a pair of adjacent neurons over which impulse passes?

  1. Synapse

  2. Axon

  3. Dendrite

  4. Cell body

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • When a nerve impulse reaches the synapse at the end of a neuron, it cannot pass directly to the next one instead it triggers the neuron to release a chemical neurotransmitter. The neurotransmitter drifts across the gap between the two neurons.

So, the correct option is'Synapse'

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.