Redraw the diagram. Name and label the parts indicated, below, Secretes neurotransmitter

The neuron can be characterised as the structural and functional unit of the nervous system. It is composed of dendrons, soma, axon hillock, axon, and synaptic knobs. Neurotransmitters carry the neural or electrical signal across the synapse to other neurons. Synaptic knobs secrete the neurotransmitter.

Redraw the diagram. Name and label the parts indicated, below, Branches of dendrons

The neuron can be characterised as the structural and functional unit of the nervous system. It is composed of dendrons, soma, axon hillock, axon, and synaptic knobs. Dendrites can be characterised as tree-like extensions found to be present at the beginning of the neuron. These structures receive information from other neurons and transmit electrical stimulation to the soma or the cell body of the neuron.

Complete the table by selecting suitable items from the box : A B C Disease Alzheimer's Parkinsons Epilepsy Cause __(a)__ __(b)__ __(d)__ Symptom Loss of memory __(c)__ Epilepsy frothy discharge Excess blood is lost even through minor injuries Loss of body balance Accumulation of insoluble proteins in the neural tissues of brain Production of dopamine reduces Irregular flow of electric charges in brain

Alzheimer's disease can be characterised as a chronic neurodegenerative disease that typically starts slowly and gradually degenerates over time. The accumulation of insoluble proteins in the neural tissues of the brain is responsible for this phenomenon. The most common symptom of this disease involves difficulty in remembering recent events. Parkinson's disease can be characterised as a neural disorder. It is caused due to loss of the neurotransmitter dopamine. This disease causes loss of body balance in the body of a human. In epilepsy, the functioning of the brain and the nervous system becomes abnormal. It is a disorder of the nervous system. Symptoms of Epilepsy are continuous muscular contraction, frothy discharge from the mouth, clenching of the teeth following which the patient falls unconscious. This condition arises due to result of the disrupted electrical activity of the brain. A B C Disease Alzheimer's Parkinsons Epilepsy Cause Accumulation of insoluble proteins in the neural tissues of brain Production of dopamine reduces Irregular flow of electric charges in brain Symptom Loss of memory Loss of body balance Epilepsy frothy discharge

Redraw the diagram. Name and label the parts that perform the given functions. Controls heartbeat, breathing etc.

Medulla oblongata can be characterised as the foremost caudal brainstem structure situated within the posterior-most part of the brainstem merging with the medulla spinalis. It is located anterior to the cerebellum within the brain stem, inferior to the pons. This structure regulates the heartbeat, breathing, and other physiological functions in the body of an individual.

Redraw the diagram. Name and label the parts that perform the given functions. Maintains equilibrium of the body.

The cerebellum is located in the hindbrain below the cerebrum. The cerebrum, cerebellum, and medulla oblongata are located in alignment connecting to the spinal cord and hence controlling movements. This structure helps in the maintenance of posture, balance, and equilibrium in the body of a human.

Suitably arrange the information under the given headings. Evokes sensations. Coordinates the repeated movements during walking and running. Impulses from the different parts of the body are transmitted to and from the brain Coordinates muscular activities and maintains equilibrium of the body. Brain Spinal cord

The brain and spinal cord play an essential role in the coordination of the impulses in the body of a human. Neurons help to relay the stimulus between different parts of the body. The brain evokes sensations and coordinates muscular activities and maintains the equilibrium of the body. The spinal cord coordinates the repeated movements during walking and running and relays impulses from the different parts of the body are transmitted to and from the brain. Brain Spinal cord Evokes sensations. Coordinates the repeated movements during walking and running. Coordinates muscular activities and maintains equilibrium of the body. Impulses from the different parts of the body are transmitted to and from the brain

Analyse the illustration and answer the following questions : Are all accidental responses controlled by (iii) ? Explain with an example.

A reflex arc is a pathway that controls a reflex in the body of a human. Sensory neurons pass through the spinal cord as most of them do not pass directly into the brain. This helps for faster reflex action. It allows the spinal motor neurons to get activated without the delay of signals through the brain. In the given diagram (iii) represents the spinal cord. Not all accidental responses are controlled by the spinal cord. For example, when light falls on our eyes or any object moves towards our eye we normally close our eyes. This response is under the control of the cerebrum.

Analyse the illustration and answer the following questions : Write the names of (i) and (ii).

A reflex arc is a natural pathway that controls a reflex. Sensory neurons pass through the spinal cord as most of them do not pass directly into the brain. This helps for faster reflex action. It allows the spinal motor neurons to get activated without the delay of signals through the brain. In the given diagram (ii) represents the interneuron and (i) represents the sensory neuron. The interneuron establishes the connection between two neurons.

Observe the picture and answer the following question How does myelin sheath form ?

The myelin covering is known as the myelin sheath and is broken up at points called the nodes of Ranvier. This structure plays an essential role in increasing the speed of the transmission of the signal. Some axons are covered with myelin which is a lipid substance and acts as an insulator. Myelin sheath is formed due to the repeated encircling of Schwann cells around the axon.

Observe the picture and answer the following question Name the part indicated as (i).

In the given diagram the axon is represented by (i). The neuron can be characterised as the structural and functional unit of the nervous system. It is composed of dendrons, soma, axon hillock, axon, and synaptic knobs. Axon can be characterised as the elongated fibre of the neuron that extends from the soma to the terminal endings and transmits the neural signal.

Suitably arrange the information under the given headings. Evokes sensations. Coordinates the repeated movements during walking and running. Impulses from the different parts of the body are transmitted to and from the brain Coordinates muscular activities and maintains equilibrium of the body. Brain Spinal cord

The brain and spinal cord play an essential role in the coordination of the impulses in the body of a human. Neurons help to relay the stimulus between different parts of the body. The brain evokes sensations and coordinates muscular activities and maintains the equilibrium of the body. The spinal cord coordinates the repeated movements during walking and running and relays impulses from the different parts of the body are transmitted to and from the brain. Brain Spinal cord Evokes sensations. Coordinates the repeated movements during walking and running. Coordinates muscular activities and maintains equilibrium of the body. Impulses from the different parts of the body are transmitted to and from the brain

Redraw the diagram. Name and label the parts that perform the given functions. Maintains equilibrium of the body.

The cerebellum is located in the hindbrain below the cerebrum. The cerebrum, cerebellum, and medulla oblongata are located in alignment connecting to the spinal cord and hence controlling movements. This structure helps in the maintenance of posture, balance, and equilibrium in the body of a human.

Redraw the diagram. Name and label the parts that perform the given functions. Controls heartbeat, breathing etc.

Medulla oblongata can be characterised as the foremost caudal brainstem structure situated within the posterior-most part of the brainstem merging with the medulla spinalis. It is located anterior to the cerebellum within the brain stem, inferior to the pons. This structure regulates the heartbeat, breathing, and other physiological functions in the body of an individual.

EASY

10th Kerala Board

IMPORTANT

Earn 100

Redraw the diagram. Name and label the parts indicated, below,

Carries impulses away from the cell body

Important Questions on Sensations and Responses

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10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2018>Q 7

Redraw the diagram. Name and label the parts indicated, below,

Question Image

Secretes neurotransmitter

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10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2018>Q 8

Redraw the diagram. Name and label the parts indicated, below,

Question Image

Branches of dendrons

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10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2019>Q 9

"Myelin sheath accelerates the speed of impulses through axon and provides nutrition to it."

How does myelin sheath form?

MEDIUM

10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2019>Q 10

Complete the table by selecting suitable items from the box :

	A	B	C
Disease	Alzheimer's	Parkinsons	Epilepsy
Cause	__(a)__	__(b)__	__(d)__
Symptom	Loss of memory	__(c)__	Epilepsy frothy discharge

Excess blood is lost even through minor injuries
Loss of body balance
Accumulation of insoluble proteins in the neural tissues of brain
Production of dopamine reduces
Irregular flow of electric charges in brain

EASY

10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2019>Q 11

Redraw the diagram.
Name and label the parts that perform the given functions.

Question Image

Relay station of impulses.

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10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2019>Q 12

Redraw the diagram.
Name and label the parts that perform the given functions.

Question Image

Controls heartbeat, breathing etc.

EASY

10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2019>Q 13

Redraw the diagram.
Name and label the parts that perform the given functions.

Question Image

Maintains equilibrium of the body.

EASY

10th Kerala Board

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 1 - Sensations and Responses>Kerala Board-2020>Q 14

Suitably arrange the information under the given headings.

Evokes sensations.
Coordinates the repeated movements during walking and running.
Impulses from the different parts of the body are transmitted to and from the brain
Coordinates muscular activities and maintains equilibrium of the body.

Brain	Spinal cord

Redraw the diagram. Name and label the parts indicated, below, Carries impulses away from the cell body

Important Questions on Sensations and Responses

Learn and Prepare for any exam you want !

Redraw the diagram. Name and label the parts indicated, below,

Carries impulses away from the cell body