Calcium and Vitamin D. Adults older than 70 need more calcium and vitamin D to help maintain bone health than they did in their younger years. ...
Answer:
Explanation:
Muscle contraction is stimulated by the movement of an action potential moving along a nerve fiber to the muscles. This event follow some series of process before being stimulated.
1. The impulse arrives at the synapse and travels through the transverse tubules.
2. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4. Tropomyosin molecules bind to exposed active sites, linking actin and myosin.
5. Thin filaments are pulled over the thick filaments.
6. The muscle fiber shortens and contracts.
Answer:Ridge push
Explanation: hope this helps <3
Theory because a theory has to be backed up by several experiments
Some examples of electric fields in science are light, X- rays, radio waves, microwaves, etc.
