Materials are able to move across a cell membrane through one of two methods: active transport or passive transport. what is the difference between active transport and passive transport?

Passive transport: When materials move across cell membranes without using cell energy (ATP). Diffusion, facilitated diffusion, and osmosis are examples Moves small molecules like water, oxygen, carbon dioxide and glucose. ... Movement of materials across the cell membrane that requires the use of cell energy (ATP).

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.