1. Regulation and the Nervous System

2. What is “REGULATION”?
To maintain a stable internal environment in a changing external environment; to keep the body “regular.”

3. Nervous system
The body’s way of sending internal electrochemical messages from place to place

4. Functions of the nervous system:
Response to stimuli
Control of voluntary muscles and voluntary reflexes.
Control of involuntary muscles (smooth muscle, cardiac muscle, glands) and autonomic reflexes (heart rate, blood pressure, glandular secretion, etc.)
Integration of body processes
Responsible for conscious thought and perception, emotions, personality, the mind

5. 1) Stimulus and Response

6. Stimulus: Detectable change in the environment
Sensor: Structures that can detect change
Nerve impulse: Electrochemical signal.
Effector: Muscle or gland.
Response: Change in that gland or muscle.

7. The Sensor: Sensory Organs
Eyes
Ears
Nose
Tongue
Skin/lips

8. 2) Control of Voluntary Muscles and Voluntary Reflexes
The Sensory organs and nerves, along with the voluntary muscles and their nerves make up the peripheral nervous system

9. The Neuron
(Cyton)

10. The Neuron

11. The Synapse

12. The Nerve Impulse: The Sensory Neuron

13. The Nerve Impulse: Interneurons

14. The Nerve Impulse: The Motor Neuron
Effector

15. Reaction Time Lab

16. Holding our breath caused our heart rate to go up
3) Control of involuntary muscles (smooth muscle, cardiac muscle) and autonomic reflexes (heart rate, blood pressure, etc.)
Holding our breath caused our heart rate to go up

17. 4) Integration of body processes

18. 5) Responsible for conscious thought and perception, emotions, personality, the mind

19. The Brain Cerebrum: Cerebellum Medulla: Corpus Callosum
The Brain and Spinal cord make up the Central Nervous System.
Cerebrum:
The “thinking” part; memory and cognition.
Cerebellum
Balance and coordination
Medulla:
Involuntary activity (heart rate, breathing)
Corpus Callosum
Connects left and right brain hemispheres