Anatomy and Physiology II Practice Test

Vitamins are classified into two categories based on their solubility: fat soluble and water soluble. Fat-soluble vitamins are those that dissolve in fats and oils, which allows them to be stored in body tissues.

The vitamins that fall under the category of fat-soluble include vitamins A, D, E, and K. These vitamins are absorbed along with dietary fats and can be stored in the liver and fatty tissues for later use. The presence of dietary fat is crucial for their absorption; without adequate fat intake, the body may not effectively absorb these essential nutrients.

While vitamins K and E are indeed fat soluble, the complete list includes A and D as well. Therefore, while K and E are part of the correct grouping, it's important to recognize that vitamins A and D are also included in the fat-soluble category. This broader understanding of fat-soluble vitamins, which encompasses A, D, E, and K, is vital for grasping the role these nutrients play in various physiological functions, such as vision, bone health, blood coagulation, and antioxidant protection.