1. The Nervous System: An Intro
Biology 12

2. Joke of the day:

3. Brain Review

4. Use pages as well!

5. FRONTAL LOBE
Emotions, reasoning, planning, movement, and parts of speech.
Purposeful acts such as creativity, judgment, problem solving, and planning.

6. PARIETAL LOBE
Connect with the processing of nerve impulses related to the senses, such as touch, pain, taste, pressure, and temperature.
Language functions

7. TEMPORAL LOBE Responsible for hearing, memory, meaning, and language
Role in emotion and learning.
Interpreting and processing auditory stimuli

8. OCCIPITAL LOBE Involved with the brain's ability to recognize objects
Responsible for vision

9. What is the nervous system?
The system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli.
In vertebrates it consists of the brain, spinal cord, nerves, ganglia, and parts of the receptor and effector organs.
Consists of two main parts, the central nervous system (CNS) and the peripheral nervous system (PNS)

12. Central Nervous System
CNS
Coordinating centre for information coming in and going out
Includes brain and spinal cord

13. Peripheral Nervous System
PNS
Consists mainly of nerves, which are long fibres that connect the CNS to every other part of the body.
It is further subdivided into two systems:
Somatic
Autonomic

14. Somatic vs. Autonomic
Somatic nerves (voluntary) control skeletal muscle, bones, skin and senses.
Autonomic nerves (involuntary) control internal organs of the body.

15. One last subdivision……
Autonomic nerves can be divided into:
Sympathetic
“on” switch to prepare for stress
Parasympathetic
“off” switch to return to normal resting levels

16. Review: Divisions

17. Cells of the nervous system:
The nervous system is composed of trillions of nerve cells and other cells that maintain and support the nerve cells.
Glial cells: maintain and support neurons, they do not carry impulses.
Neurons: cells that conduct nerve impulses. They function electrically to create thought and action in our bodies (there are three types of neurons)

18. Neuron
Glial Cell

19. Types of Neurons:
Sensory neurons: sense and relay information from the environment to the CNS for processing, collecting information from sensory organs (ears, eyes, etc.)
Interneurons: link other neurons together, they relay information
Motor neurons:relay information from CNS to effectors (effectors include: mucsles, organs, etc.)

21. Nerves: Many neurons connected together form a nerve
Length is quite variable

22. To do: Nervous System WS Page 417 Page 437 Questions 1, 2