1. BODY SYSTEM WORKBOOK Learning Target: Identify the function & organs in the nervous system Science Starter: Read pg. 442 (Excretory systeem) in reading packet and answer question #4

2. Announcements 1. Return all graded papers
2. Bring both workbooks, weekly homework & readings to class daily
3. Remember all test corrections and missing work is due by Friday at 3:30! Otherwise those grades will be entered as 0’s. (You will have 2 more grades this 6 weeks.)
4. HW 29 (white) Question of the Day

3. The Nervous System

4. Functions of the Nervous System
the center of all thought, learning and memory

5. Functions of the Nervous System
the center of all
thought, learning and
memory
regulates and
maintains
homeostasis (a state of balance)
examples: body temperature, heart rate, respiration, digestion

6. Functions of the Nervous System
the center of all
thought, learning and
memory
regulates and
maintains homeostasis
(a state of balance)
examples: body
temperature, heart rate, respiration, digestion
keeps us in touch with our internal and external environment

7. Two Divisions of the Nervous System
Central Nervous
System- brain and
spinal cord

8. Two Divisions of the Nervous System
Central Nervous System- brain and spinal cord
Three Main Parts of Brain:
Cerebrum-
interprets input from
senses and controls
voluntary muscles

9. Two Divisions of the Nervous System
Central Nervous System- brain and spinal cord
Three Main Parts of Brain:
Cerebrum- interprets
input from senses and
controls voluntary
muscles
Cerebellum- coordinates
actions of muscles and
helps keep your balance

10. Two Divisions of the Nervous System
Central Nervous System- brain and spinal cord
Three Main Parts of Brain:
Cerebrum- interprets
input from senses and
controls voluntary muscles
Cerebellum- coordinates
actions of muscles and
helps keep your balance
Brainstem- controls
homeostasis and
coordinates involuntary
muscles

11. What is this part of the brain called?
Cerebrum
Cerebellum
Brain stem
Spinal cord

12. What is the function of the brain stem?
Controls homeostasis & voluntary muscles
Controls senses & voluntary muscles
Controls balance & coordinates muscles
Controls homeostasis & involuntary muscles

13. When you feel hungry, what function is your nervous system trying to carry out?
Maintaining homeostasis
Moving your body
Sensing your environment
Keeping your balance

14. Two Divisions of the Nervous System
Peripheral Nervous
System- connects the
Central Nervous System
to the rest of the body

15. Two Divisions of the Nervous System
Peripheral Nervous System- connects the Central Nervous System to the rest of the body
Two Groups:
Somatic nervous system-
controls voluntary actions
and input from senses
(sound, sight, touch, etc.)

16. Two Divisions of the Nervous System
Peripheral Nervous System- connects the Central Nervous System to the rest of the body
Two Groups:
Somatic nervous system-
controls voluntary actions and
input from senses (sound,
sight, touch, etc.)
Autonomic nervous system-
controls homeostasis by
regulating the heart, breathing,
and digestion without
conscious thought

17. Which division of the nervous system is made up of the brain & spinal cord?
Autonomic nervous system
Somatic nervous system
Central nervous system
Peripheral nervous system

18. Which part of the Peripheral Nervous System controls processes that maintain homeostasis without you even thinking about it?
Autonomic nervous system
Somatic nervous system
Central nervous system
Peripheral nervous system

19. Nerve cells are called neurons
Impulse- a message carried by a neuron

20. Nerve cells are called neurons
Impulse- a message carried by a neuron
Synapse- the small space that an impulse jumps between neurons

21. Types of Neurons
Sensory neurons: in the skin, muscles, joints, and organs that can sense pressure, temperature, and pain 

22. Types of Neurons
Sensory neurons: in the skin, muscles, joints, and organs that can sense pressure, temperature, and pain 
neurons in nose & tongue sense tastes and smells
neurons in inner ear
sense sounds
rods and cones in eye
sense sight

23. Types of Neurons
Motor neurons: stimulate muscle cells throughout the body

24. Types of Neurons
Motor neurons: stimulate muscle cells throughout the body
includes muscles of the heart, diaphragm, intestines, and bladder

25. Types of Neurons
Interneurons: connect other neurons

26. Types of Neurons Interneurons: connect other neurons
all neurons in the central nervous system (brain, spinal cord) are interneurons

27. Reflex Reflex- an involuntary response to a stimulus
(change in environment)
that allows the body to
respond quickly without
thinking about it.

28. What is an impulse? A nerve cell A message carried by neurons
The space between two neurons
A reflex

29. What is this structure called?
Axon
Synaptic terminal
Nucleus
Dendrite

30. What does a motor neuron stimulate?
Brain cells
Sensory organs
Muscle cells
Sensory neurons

31. Which is not true about a reflex?
It is a quick response.
It is voluntary.
It does not require conscious thought.
It is a response to an external stimulus.

32. BONUS: What is a change in the environment that your body responds to called?
Stimulus
Response
Reflex
Sense

33. Reaction Time
1. Hold an arm out with palm down. Put a penny on the center of the back of your hand.
2. Slowly tilt your hand to the side so that the penny slides off. Try to catch the penny with the same hand.
3. We will repeat this 9 times to see if our reaction time or catches improves!