Control and Coordination Blog 1

CLASS 10 CHAPTER 7 

CONTROL AND COORDINATION
Day 1

Dear Learners,

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Note: Content written in blue should be recorded as notes in the Biology Notebook.

This is our first class for this chapter. At the end of it, you will be able to:

1. Define control and coordination.
2. Explain the structure and function of a neuron.
3. Draw structure of a neuron.
4. List different types of receptors. 

Happy Learning!😊

Introduction:

1. Movement in organisms

The ability of organisms to move certain body parts is movement.
When they move from one place to another, it is called locomotion.

2. CONTROL 

 The process by which various biochemical processes are regulated.

3. COORDINATION

It is a working of various systems in the body together.
It is controlled by the Nervous System and the Endocrine System.
Chemical Coordination is seen in plants and Animals.

4. STIMULUS

1. Any change in the environment to which an organism responds or reacts.

2. The response to stimuli is a characteristic feature in each living organism.

https://youtu.be/5jTMwIoMSUE (check this video on response to stimulus)

ANIMAL NERVOUS SYSTEM:

BASIC UNIT OF NERVOUS SYSTEM:

The basic unit of the Nervous System is a Nerve Cell or Neuron. It is the longest cell in the body. It is specialized to receive and transmit messages in the form of electrical impulses. 

(To be drawn in Bio notebook, Refer to Pg. No. 115)

Transmission of the Nerve impulse:

These are the messages that are transmitted in the Nervous system.

1. The information or any stimulus is received by the specialized tips of some nerve cells of the receptors.

2. These receptors are present in different sense organs:

 a. OLFACTORY RECEPTOR: present in Nose and detects smell.

 b. GUSTATORY RECEPTOR: present over Tongue and detects taste.

 c. PHOTORECEPTOR: present in eyes and detects light.

 d. PHONORECEPTOR: present in ears and detects sound.

 e. THERMORECEPTOR: present in the skin and detects a change in temperature.

3. The information received at the dendrite end of the nerve cell of the receptor starts a chemical reaction that generates chemical impulse.

4. The impulse travels from dendrite towards the cell body and through axon towards the nerve ending.

5. At the end of the nerve ending, the electrical impulse sets off the release of some chemicals called neurotransmitters.

6. These chemicals cross the gap or synapse (Junction between two nerve cells) and start a similar electrical impulse in the dendrite of the next neuron.

Neuromuscular Junction is the junction present between two nerve cells and a muscle cell.

                                       (To be drawn in Bio notebook, Refer to Pg. No. 115)

https://youtu.be/lRJd56BCidg (Check this video on Neuromuscular junction) 

Assignment

• Read pg. 114-115 of the N.C.E.R.T

I hope it helped!

See you for the Next Class!

Take care.😊😊😊