Question

• moves molecules from _areas of low_ concentration to _areas of high_ concentration.
• example: na⁺/k⁺ pump.
• substances actively transported include: _suggar_, _aas_, na⁺, k⁺, ca²⁺, h⁺.
• endocytosis = movement into the cell.

o pinocytosis = \cell _drinking_.\.
o phagocytosis = \cell _eating_.\.
o receptor - mediated endocytosis = highly ____ uptake.

• exocytosis = movement _material out_ the cell.

Explanation:

This text describes active transport in cells which moves molecules against the concentration - gradient (from low to high concentration), gives examples of substances actively transported and types of endocytosis (pinocytosis, phagocytosis, receptor - mediated endocytosis) and exocytosis. Receptor - mediated endocytosis is highly specific uptake.

Answer:

The blanks are filled as follows:

• Moves molecules from areas of low concentration to areas of high concentration.
• Substances actively transported include: sugar, amino acids (AAs), $Na^+$, $K^+$, $Ca^{2+}$, $H^+$.
• Pinocytosis = "cell drinking."
• Phagocytosis = "cell eating."
• Receptor - mediated endocytosis = highly specific uptake.
• Exocytosis = movement of material out of the cell.