State 2 preventive actions a person could take to reduce the chance of a heart attack

Ascientist is examinin the cell is disrupted when she damages one specific type of macromolecule g the function of macromolecules in a cell she notices that movenent of large molecules into and out of

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

Why do mountaineers become breathless as they reach high altitudes