Cellular Transport and Macromolecules

What is the main difference between dynamic and static equilibrium?

• Static equilibrium involves constant changes; dynamic equilibrium does not.

• Dynamic equilibrium involves balance through ongoing changes, while static equilibrium does not involve change.

• Both terms mean the same thing.

• Static equilibrium only occurs in living systems.

Which of the following is an example of the body maintaining homeostasis?

• Sweating when it’s hot.

• Holding your breath underwater.

• Getting a sunburn.

• Standing still.

What is a key difference between positive and negative feedback loops?

• Positive feedback opposes change; negative feedback amplifies it.

• Negative feedback opposes change; positive feedback amplifies it.

• Both types stop the stimulus.

• Only negative feedback occurs in living systems.

Which of the following is an example of a positive feedback loop?

• Childbirth.

• Regulation of blood sugar.

• Sweating to cool down.

• Shivering to warm up.

How does the cell membrane help maintain homeostasis?

• By controlling the flow of substances in and out of the cell.

• By breaking down harmful toxins.

• By storing energy.

• By creating new organelles.

Which of the following is a type of passive transport?

• Endocytosis

• Osmosis

• Exocytosis

• Protein Pumps

What type of transport requires energy?

• Osmosis

• Facilitated diffusion

• Active transport

• Diffusion

Which substance is commonly transported by osmosis?

• Glucose

• Water

• Sodium

• Potassium

Which type of transport involves moving substances against the concentration gradient?

• Diffusion

• Facilitated diffusion

• Active transport

• Osmosis

Which process involves the cell engulfing large particles?

• Exocytosis

• Endocytosis

• Facilitated diffusion

• Osmosis