Science Starter Why do muscles get bigger when someone works out?

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Presentation transcript:

Science Starter Why do muscles get bigger when someone works out? How do muscles get “energy”? What does it mean for a muscle to contract?

Today’s Agenda Science Starter Microscopic Structure of a Muscle Sarcomere Labeling Sheet Midterm Grades Exit Quiz

Unit 4: Skeletal & Muscular System 4 Unit 4: Skeletal & Muscular System 4.5 Microscopic Structure of a Muscle

Microscopic Structure of a Muscle Fill out the note sheet using the slides around the room Mrhoutzscience.weebly.com You will have 15 minutes to complete If you are done early there is a worksheet at the front to complete https://www.youtube.com/watch?v=y7X7IZ_ubg4

Sarcomere Labeling Sheet Label & Color all of the structures on the sheet Be sure to memorize all of the major parts of a muscle (especially the sarcomere!) If you finish with this, take a look at your midterm and fill out the unit tracker

Midterm Grades Quarter 1 grades are finalized and submitted (they can’t be changed at this point!) Midterm Exam is out of 66 points, yes short-response were part of this total! Fill out the tracker as usual and turn it in, you can keep your midterm exam in your binder

What is rigor mortis? A few hours after a person or animal dies, the joints of the body stiffen and become locked in place. This stiffening is called rigor mortis. Depending on temperature and other conditions, rigor mortis lasts approximately 72 hours. The phenomenon is caused by the skeletal muscles partially contracting. The muscles are unable to relax, so the joints become fixed in place.

Exit Quiz Label the diagram using the following terms: 1. 2. 1. Tendon 2. Epimysium 3. Bone 4. Myofibril 5. Fascicle 6. Myofilament 3. 6. 4. 5.