BIO 201 EXAM 3 CERTIFICATION EVALUATION ACTUAL QUESTIONS AND ANSWERS FULL SOLUTION VERIFIED SUCCESS

BIO 201 EXAM 3 CERTIFICATION
EVALUATION ACTUAL QUESTIONS AND
ANSWERS FULL SOLUTION VERIFIED
SUCCESS

●● Thin filament proteins
Answer: Actin, tropomyosin, troponin


●● Troponin function
Answer: Binds Ca²⁺ and moves tropomyosin


●● Tropomyosin function
Answer: Blocks actin binding sites when relaxed


●● Titin function
Answer: Stabilizes thick filament and prevents overstretching


●● Contractile proteins
Answer: Actin and myosin


●● Regulatory proteins

, Answer: Troponin and tropomyosin


●● Sarcomere
Answer: Functional unit of muscle (Z disc to Z disc)


●● Striations caused by
Answer: Overlapping thick and thin filaments


●● Sarcoplasmic reticulum (SR)
Answer: Stores and releases Ca²⁺


●● T tubules
Answer: Carry electrical signal into muscle fiber


●● Triad
Answer: 1 T tubule + 2 terminal cisternae


●● Myoglobin function
Answer: Stores oxygen in muscle


●● Neurotransmitter at NMJ
Answer: Acetylcholine (ACh)