B3.3 Muscle and Motility
10 review questions with answers for B3.3 Muscle and Motility, marked HL. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
The basic functional and contractile unit of skeletal muscle?
- Myofibril
- SarcomereRight answer
- Troponin
- T-tubule
All 10 questions and answers
The basic functional and contractile unit of skeletal muscle?
Answer: Sarcomere
A bundle of protein filaments within a muscle fiber?
Answer: Myofibril
The thin protein filament containing binding sites for myosin?
Answer: Actin
The thick protein filament with heads that bind to actin?
Answer: Myosin
The border of a sarcomere where actin filaments are anchored?
Answer: Z line
The modified ER in muscle cells that stores and releases calcium ions?
Answer: Sarcoplasmic reticulum
Invaginations of the muscle cell membrane that carry action potentials inward?
Answer: T-tubule
The protein that blocks myosin-binding sites on actin when the muscle is relaxed?
Answer: Tropomyosin
The regulatory protein that moves tropomyosin once calcium binds to it?
Answer: Troponin
The massive, spring-like protein that spans from the Z-line to the M-line?
Answer: Titin
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options are other answers from the same set.