Tabitha is seven months pregnant with her first child. She can't believe how big her “belly” has gotten, but is disturbed by the white streaks appearing on her abdomen. What region of the skin and what structures are responsible for the stretching to accommodate the pregnancy? What is causing the white streaks

The skin of human is made-up of three layers, the dermis, middle layer and the epidermis. What causes white streak is when the is stretched beyond limits due to elasticity that occur. This is as a result of when the skin undergo elasticity and it contracts and expand.

Explanation:

Pregnancy stretch marks are pinkish streak around the stomach, breasts and hip, these occur when the collagen and elastin stretch due to pregnancy weight gain. The medical term idstriae gravidarum', which is the Latin word for stripes of pregnancy

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.