Author Question: Explain the role of vitamin A in growth and reproduction. What will be an ideal ... (Read 42 times)

WWatsford · **on:** Aug 20, 2018

Explain the role of vitamin A in growth and reproduction.

What will be an ideal response?

Question 2

Naturally occurring vitamin K in foods is ___________________ _, whereas vitamin K produced by GI bacteria is ___________________ _.

Fill in the blank with correct word

Pariscourtney · **Reply #1 on:** Aug 20, 2018

Answer to Question 1

As mentioned, vitamin A also supports reproduction and regulates growth. In men, retinol participates in sperm development, and in women, vitamin A supports normal fetal development during pregnancy. Children lacking vitamin A fail to grow; given vitamin A supplements, these children gain weight and grow taller.

The growth of bones illustrates that growth is a complex phenomenon of remodeling. To convert a small bone into a large bone, some bone cells must undo parts of the bone before other cells can build new bone, and vitamin A participates in the dismantling. The cells that break down bone contain acid and enzymes that dissolve the minerals and digest the matrix. With the help of vitamin A, these bone-dismantling cells destroy selected sites in the bone, removing the parts that are not needed. After completing their work, the bone-dismantling cells die, leaving their excavation site to be rebuilt by the bone-building cells.

Answer to Question 2

phylloquinone (K1); menaquinone (K2)