B. Water moves in by osmosis. C. amino acids and sugars would have to be moved into the cell by active transport. The protein is most directly involved in active transport, it is the carrier molecule. Biology 103 Cell Quiz B 1. The muscular system and the skeletal system interact at joints.
Bones meet at joints and muscles attach to the bones on either side of the joint.
A. microfilaments B. chloroplasts C. cilia D. Golgi apparatus 4. Diagram and label the outer membrane of a mitochondrion. Water and amino acids are at high concentrations, while steroids are at a low concentration inside a cell. Water and amino acids are at low concentrations, while steroids are at high concentration outside the cell. The cell membrane is permeable to water and steroids, but is impermeable to amino acids.