Tag: life processes: control and coordination

Questions Related to life processes: control and coordination

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

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

  1. Synapse

  2. Axon

  3. Dendrite

  4. Cell body

  5. None of these

Show answer
Correct Option: A
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'

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

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

  1. Nerve code

  2. Glacial cells

  3. Synapses

  4. Schwinn cells

Show answer
Correct Option: C
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.

The gap between two neurons is known as

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

  1. Dendrite

  2. Synapse

  3. Axon

  4. Impulse

Show answer
Correct Option: B
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. 

Which of the following chemical is released in synapse?

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

  1. Acetylcholine

  2. Choline

  3. Acetyl CoA

  4. None of the above

Show answer
Correct Option: A
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.

The word synapse was coined in 

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

  1. 1897

  2. 1997

  3. 1797

  4. 1957

Show answer
Correct Option: A
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.

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

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

  1. Synaptic cleft

  2. Synapsis

  3. Synapse

  4. Symport movement

Show answer
Correct Option: C
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.

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

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

  1. Nerve fiber

  2. Dendrites

  3. Synapse

  4. Axon

Show answer
Correct Option: C
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.

Which of the following is the component of the synapse?

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

  1. Presynaptic component

  2. Postsynaptic component

  3. Both A and B

  4. Nerve impulse

Show answer
Correct Option: C
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.

The point of communication and target cell is

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

  1. Synapse

  2. Nodes of Ranvier

  3. Dendrites

  4. Sense organs

Show answer
Correct Option: A
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.

Presynaptic ending contains 

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

  1. Mitochondria

  2. Lysosomes

  3. Centrioles

  4. All of the above

Show answer
Correct Option: A
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'.