BRAIN_CENTRAL NERVOUS SYSTEM - SCIENCE 10

BRAIN

1. SCIENCE 10 Quarter 3 Week 3

2. THE NERVOUS SYSTEM

3. NERVOUS SYSTEM: THE CONTROL SYSTEM OF THE BODY The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. It is considered as the body’s storage center of information and also the body’s control system.

4. STIMULUS RESPONSE NERVOUS SYSTEM i s a change in the environment, detected by a receptor i s a change in the organism, right after a stimulus detector Ex. Cold weather due to change in temp. Ex. a person’s reaction is to wear a jacket or thick clothes

5. FUNCTIONS: It is mainly responsible for controlling and coordinating all the organ systems by sending messages from the brain through nerve signals. It makes sure that all the parts of the body are working together efficiently to maintain homeostasis . HOMEOSTASIS – the process of maintaining the internal environment in equilibrium.

6. THE NERVE CELL The nerve cell is the basic unit of the nervous system and it is also called as neuron . There are billions of neurons in the body. A neuron has a cell body containing the nucleus. In the cell body there are root-like structures called the dendrites and axons . Dendrites carry impulses toward the cell body while axons carry impulses away from the cell body. The gap between neurons is called synapse .

7. Cell Body – is the support center of neuron. Myelin Sheath – is a protective layer around some axons and helps speed up the signal messages. The signal messages travel as electrical signals, and as they reach the end of a neuron, chemicals called neurotransmitters are stimulated. It is through neurotransmitters that the nervous system can regulate the body’s activities.

8. PARTS OF A NEURON

9. AFFERENT NERVOUS SYSTEM E FFERENT r eceive messages f rom the senses and send them to the CNS NEURON r eceive messages f rom the CNS t o the different p arts of the body

10. CENTRAL NERVOUS SYSTEM (CNS) MAJOR DIVISIONS & PARTS OF THE NERVOUS SYSTEM PERIPHERAL NERVOUS SYSTEM (PNS) - serves as the main processing center of the nervous system . It consists of two main components: Brain Spinal cord connects the central nervous system to the organs and limbs. It has two main divisions: Somatic NS Autonomic NS

11. THE CENTRAL NERVOUS SYSTEM

12. GROUP ACTIVITY

13. “ WHAT’S IN YOUR BRAIN?” Directions: Class will be grouped into four (4). Each group will be assigned on the four lobes of the brain. GROUP 1 – FRONTAL LOBE (BLUE ) GROUP 2 – PARIETAL LOBE (RED) GROUP 3 – OCCIPITAL LOBE (YELLOW) GROUP 4 – TEMPORAL LOBE (ORANGE) TASK : Color the LOBE assigned in your group. Cut and paste it on the appropriate portion on the diagram. Put the correct label and describe your work based on the format

14. LOBES LOCATION FUNCTION FRONTAL LOBE PARIETAL LOBE OCCIPITAL LOBE TEMPORAL LOBE

15. CENTRAL NERVOUS SYSTEM (CNS)

16. ANATOMY OF THE BRAIN

17. THREE PARTS OF THE BRAIN

18. LOBES LOCATION FUNCTION FRONTAL LOBE Directly behind the forehead Responsible for cognitive functions and movement. PARIETAL LOBE Positioned superior to the occipital lobe and posterior to the frontal lobe Responsible for processing touch, pain,temperature , and movement OCCIPITAL LOBE Sit at the back of the head Responsible for vision TEMPORAL LOBE Sits behind the ears and is considered as the second largest lobe Responsible for speech, hearing,and memory THE FOUR LOBES

19. THE SPINAL CORD