Steroid Hormones | MCQs

Explanation

 Steroid hormones are hydrophobic molecules synthesized from cholesterol that are able to diffuse through the plasma membrane Examples of this group are sex hormones, such as testosterone, estrogen, progesterone, as well as thyroid hormones, such as glucocorticoids and vitamin D.

Explanation

Insulin is a hormone secreted by the beta cells of the pancreas.

It helps regulate blood glucose levels by promoting glucose uptake into cells.

Explanation

Cholesterol is a vital precursor in the biosynthesis of:

Vitamin D:

• Cholesterol converts to 7-dehydrocholesterol in the skin, which forms vitamin D₃ under UV light.

Steroid Hormones:

Cholesterol is the backbone for:

• Sex hormones (testosterone, estrogen, progesterone).
• Adrenal hormones (cortisol, aldosterone).

Explanation

 The endoplasmic reticulum (ER), particularly the smooth ER, is responsible for the production of steroids, along with lipid synthesis.