Nutrition & Energy Balance

I could use some help on these questions. Any help would be appreciated.

1) Which of the following are mainly involved in the metabolic homeostasis?

A) adipose tissue, liver, skeletal muscle, and neural tissue
B) bones, muscles, integument and heart
C) heart, lungs, kidneys, brain, and pancreas
D) blood, lymph, cerebrospinal fluid, hormones, and bone marrow


2) Low-density lipoproteins are absorbed by cells through the process of _____.

A) simple diffusion
B) receptor-mediated endocytosis
C) active transport
D) facilitated diffusion
E) osmosis