Which lipid stores energy efficiently in adipose tissue?

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Multiple Choice

Which lipid stores energy efficiently in adipose tissue?

Energy storage in adipose tissue relies on triglycerides because they are highly energy-dense and stored without adding significant weight from water. A triglyceride consists of a glycerol backbone with three fatty acids; when energy is needed, enzymes break them down to fatty acids and glycerol, and the fatty acids are oxidized to produce ATP. This form packs a lot of energy per unit mass, making it ideal for long-term storage. Other lipids have different roles: phospholipids are mainly structural components of cell membranes, steroids include cholesterol and signaling hormones, and carotenoids are lipid-soluble pigments, not primary energy reserves.

Energy storage in adipose tissue relies on triglycerides because they are highly energy-dense and stored without adding significant weight from water. A triglyceride consists of a glycerol backbone with three fatty acids; when energy is needed, enzymes break them down to fatty acids and glycerol, and the fatty acids are oxidized to produce ATP. This form packs a lot of energy per unit mass, making it ideal for long-term storage. Other lipids have different roles: phospholipids are mainly structural components of cell membranes, steroids include cholesterol and signaling hormones, and carotenoids are lipid-soluble pigments, not primary energy reserves.

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