1: seniors in high school because that is when everyone is wanting to be the most popular.
2: ????
3:???
Explain the role of Calcium(Ca+) in askeletal muscle contraction. Role of calcium { Ca++}: By BONDING to the TROPONIN it causes the TROPOMYOSIN to MOVE from its blocking position on the active sites on the actin filaments SO the CROSS BRIDGES CAN ATTACH.
Answer:
I'm confident it's D. Fluid can build up in the lungs
