Y3V-T1-LSN6

• Biologie
• Voortgezet speciaal onderwijs
• Leerroute 3

 Anatomy & Homeostasis

Y3V-T1-LSN6

Homeostasis & Temperature regulation

Learning Goals LSN5:

• I know what the nervous, skeletal & muscular systems are and can explain their function.
• I can explain how these organ systems work together.
• I can identify various organs in each system and explain their functions. 

A person suffers nerve damage in their arm. How does this affect the muscular and skeletal systems?

1. The muscles will still contract normally, and the skeleton moves as usual.
2. The skeleton produces more nerves to replace the damaged ones.
3. The muscles may not receive signals to contract, so the skeleton cannot move properly.
4. The muscles strengthen independently to compensate for nerve loss.

When you lose your balance and quickly catch yourself, which best explains the systems at work?

1. The nervous system detects imbalance, then signals muscles to contract and adjust skeletal position
2. The skeletal system signals the nervous system to stop the fall.
3. The muscular system senses the imbalance and tells the nervous system to move the bones.
4. The muscular system stiffens bones so balance cannot be lost.

Learning Goals LSN6:

• I know what homeostasis is
• I know how the body can keep homeostasis
• I can name and explain an example of homeostasis in at least 1 other animal 
• I know examples of homeostasis in the human body.
• I know how our body regulates temperature.
• I can name and explain how cold blooded animals differ from humans in regulating their body temperatures.

Key words:

• Integumentary system
• Constrict
• Dilate
• Shivering
• Evaporate
• Goosebumps

• homeostasis
• negative feedback
• positive feedback
• sensor
• controlor
• effector

Homeostasis

All organs and organ systems working together,creating a balance inside your body.

Negative and positive feedback loops are used to maintain this balance. 

What needs to be balanced in your body?

Negative feedback loop

The sensor registers an imbalance, the controller tells the effector how to respond. This returns to a balance.

High

Low

Low

High

too high

too low

Hypothalamus

Positive feedback loop

The sensor registers an imbalance, the controller tells the effector how to respond. This creates a snowball effect.

Does positive feedback help to keep the body in homeostasis?

Give examples when positive feedback is necessary in the body

Examples of positive feedback

• Childbirth
• Breast feeding
• Digestion
• Blood clothing

Learning Goals LSN6:

• I know what homeostasis is
• I know how the body can keep homeostasis
• I can name and explain an example of homeostasis in at least 1 other animal 
• I know examples of homeostasis in the human body.
• I know how our body regulates temperature.
• I can name and explain how cold blooded animals differ from humans in regulating their body temperatures.

Homework

• Read the following pages in your textbook:p.98-99.
• Make exercises on the hand-out