Front of the room Door Ryan C. Maddie Charlie Max Coren Nate Olivia Bella Ali Nick James Mary Garrett Max Curran Kaleb Alec Annie Brandon Maya Ryan B. Brady Juliana Austin January Period 2 Seating Plan
The Muscular System Textbook Reading: Chapter 36.2
Key Questions How does structure meet function in your muscles? – How many kinds of muscles does your body have? Where? – How are muscles set up? – What is a striations? How do muscles use energy?
The Muscular System List as many muscles as you can! Can you organize your list into muscle pairs? What kinds of muscles did you list?
Skeletal Muscles Work in pairs to move bones across a joint “Antagonistic Pairs” pull bones by contraction – One contracts as the other relaxes
Some types of motion Flex – Extend Abduction – Adduction
Chicken Wing dissection Is a chicken’s wing homologous to a human arm?
Other types of muscles?
At a lab bench, set up microscope and look at the 3 different types of muscle. What is the difference?
Key Tissue Differences Striated Skeletal MuscleSmooth Muscle
Warm up– use your notes to answer Sketch an ATP molecule. Label where the energy is stored. Describe what takes place when ATP is converted to ADP and vice versa. Create a Venn diagram to compare and contrast the structural difference between ATP and ADP.
What is a Striation? A striation is a “striped” pattern on muscle fibers due to overlapping thick and thin filaments (proteins) inside the muscle cells Be sure to sketch a striation in your notes!
What happens to striations when you contract your muscle? Muscle fiber at rest Muscle fibers in contraction
Up Close! Thick fibers have “arms” that attach to thin fiber and pull themselves along sliding the thin fibers closer together. This is called the Sliding Filament Theory
Sliding Filament Theory in Action Find and view 3 videos that show the Sliding Filament theory in action Create a URL list and print it for your table to add to your notes
Put it in your own words! Explain the sliding filament theory in 4-6 steps to describe what changes take place in a muscle when it contracting. Be prepared to share with the class!