HUMAN NUTRITION

Detailed explanation-1: -One major class of lipids is the steroids, which have structures totally different from the other classes of lipids. The main feature of steroids is the ring system of three cyclohexanes and one cyclopentane in a fused ring system as shown below. There are a variety of functional groups that may be attached.

Detailed explanation-2: -Structurally, steroids are derivatives of a reduced 3-ring phenanthrene molecule with a fourth (”D”) ring added. The carbons of the A, B, C, and D rings are conventionally numbered 1 through 17. Steroid hormones interact with cellular receptors.

Detailed explanation-3: -Steroids such as cholesterol and cortisol are composed of four fused hydrocarbon rings. Cholesterol is the most common steroid. Cholesterol is mainly synthesized in the liver and is the precursor to many steroid hormones such as testosterone and estradiol, which are secreted by the gonads and endocrine glands.

Detailed explanation-4: -Four fused hydrocarbon rings comprise steroids such as cholesterol and cortisol. Cholesterol is the most common steroid. The liver synthesizes cholesterol and is the precursor to many steroid hormones such as testosterone and estradiol, which gonads and endocrine glands secrete. It is also the precursor to Vitamin D.