Which best explains how muscle cells and skin cells are adapted for our environment? question 2 options: 1 muscle cells have more mitochondria than skin cells because the human body is made up of more muscle than skin. 2 muscle cells need more mitochondria than skin cells because skin cells require a cell wall. 3 skin cells need more energy, so they have less mitochondria than muscle cells. 4 muscle cells need more energy, so they have more mitochondria than skin cells.

The correct answer is option 4, that is, muscle cells require more energy, so they have more mitochondria in comparison to the skin cells.  

Mitochondria are the powerhouse of the cells. The synthesis of ATP takes place in them, that is, the energy currencies of the cell. The cells of the muscles need to work hard and thus require ample energy, for this, they need more concentration of mitochondria to generate a high energy yielding ATPs.  

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.