Answer:
Speed
Explanation: To calculate speed is distance divided by timeand the outcome is miles per hour
Answer:
b, the definition of an ion is a charged atom or molecule
Answer:
Water soluble hormones bind to a cell surface localized receptor initiating a signaling cascade using intracellular second messengers for example epinephrine.
Hormone binding activates the G-protein and G-protein activates the adenylyl cylase and it catalyzed the conversion of ATP to cAMP which is second messenger in this pathway. cAMP activate the protein kinase and then protein kinase activate certain cytoplasmic protein which alter the activity of cell.
Answer:
Organs are the body's recognizable structures
a few examples would be the heart, liver, stomach, eyes, etc.
hope this helps :)