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

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.

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.

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.

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.

E M B I B E

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

Embibe Experts Solutions for Chapter: Sensations and Responses, Exercise 1: Kerala Board-2018

Author:Embibe Experts

Embibe Experts Biology Solutions for Exercise - Embibe Experts Solutions for Chapter: Sensations and Responses, Exercise 1: Kerala Board-2018

Attempt the free practice questions on Chapter 1: Sensations and Responses, Exercise 1: Kerala Board-2018 with hints and solutions to strengthen your understanding. EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Chapter: Sensations and Responses, Exercise 1: Kerala Board-2018 with Hints & Solutions

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.

EASY

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.