Cellular Transport and Homeostasis Quiz

What triggers the sensation of thirst in our bodies?

• A drop in body temperature

• Dehydration of cells

• A signal from the stomach

• A need for more oxygen

What is homeostasis?

• A balance among body systems for proper function

• A state of constant change in the body

• A process of rapid cell division

• A method of energy production in cells

Which of the following is NOT a method of passive transport?

• Osmosis

• Diffusion

• Facilitated diffusion

• Sodium-potassium pump

How do molecules move during diffusion?

• From low to high concentration

• Only within cell membranes

• From high to low concentration

• Randomly without any pattern

What is the main difference between diffusion and osmosis?

• Osmosis involves water moving across a semi-permeable membrane

• Diffusion only happens in liquids

• Diffusion requires energy

• Osmosis occurs in open spaces

Why is facilitated diffusion important for cells?

• It helps cells divide faster

• It speeds up the movement of water

• It allows large molecules to enter cells without energy

• It prevents molecules from leaving the cell

What role does insulin play in facilitated diffusion?

• It breaks down glucose

• It acts as a transport molecule for glucose

• It blocks glucose from entering cells

• It provides energy for glucose transport

What is a key characteristic of active transport?

• It moves substances with the concentration gradient

• It requires energy to move substances

• It is faster than passive transport

• It only occurs in plant cells

Which process is an example of active transport?

• Diffusion

• Osmosis

• Facilitated diffusion

• Sodium-potassium pump

Why is active transport necessary for cells?

• To maintain a constant temperature

• To move substances against the concentration gradient

• To allow water to enter cells freely

• To enable cells to divide