16.3 Vocabulary

What is homeostasis?

• The process of cell division
• A self-regulating process maintaining internal stability
• The breakdown of glucose
• The movement of water molecules

Which statement best describes diffusion?

• Active movement against a concentration gradient
• The formation of new proteins
• Movement from high to low concentration
• The breakdown of complex molecules

What is the primary characteristic of an isotonic solution?

• Higher solute concentration than cell contents
• Lower solute concentration than cell contents
• Equal solute concentration to another solution
• No solute concentration

Which components make up cell membranes?

• Only proteins and water
• Lipids, proteins, and sugars
• Just phospholipids
• Only carbohydrates

What defines a hypertonic solution?

• Equal solute concentration
• Lower solute concentration than cell contents
• No solute concentration
• Higher solute concentration than cell contents

What is osmosis?

• Movement of proteins across membranes
• Net movement of water across a semipermeable membrane
• Transport of glucose molecules
• Movement of ions through channels

What are aquaporins?

• Protein channels specifically for water transport
• Lipid molecules in cell membranes
• Energy molecules for cell transport
• Waste products of cellular respiration

Which process describes endocytosis?

• Release of substances from cells
• Movement of water molecules
• Cell engulfing substances in vesicles
• Breaking down of protein

What is the function of facilitated diffusion?

• Active transport against concentration gradient
• Using proteins to help passive transport
• Creating new molecules
• Breaking down complex substances

How is phagocytosis defined?

• Release of waste products
• Division of cells
• Movement of water
• Cell engulfing particles by membrane extension