Amoeba Sisters - Cellular Transport

Identify 3 structures found all cells (eukaryote and prokaryote).

Which of the following is NOT an example of how living things maintain homeostasis?

• We are born as helpless babies who require protection and nurturing until we grow and develop into adults.

• We use hormones like insulin and glucagon to control the amount of blood sugar (glucose levels) in our bloodstream.

• When it is very cold outside, many of us decide to wear an extra layer to stay warm.

• We need to drink about 8 glasses of water to maintain a healthy level of hydration

How does the cell membrane help maintain homeostasis?

How many layers of lipids make up a cell membrane?

What kind of molecules are able to easily pass through the cell membrane?

• small and polar

• large and polar

• large and non-polar

• Small and non-polar

What does it mean when molecules are moving with their concentration gradient?

What is the key difference between simple diffusion and facilitated diffusion?

What similarities do simple diffusion and facilitated diffusion share?

Why does active transport require energy (ATP)?

• active transport moves molecules against the concentration gradient

• active transport moves molecules with the concentration gradient

What is endocytosis?

• a form of active transport that creates vesicles around large molecules to take them inside the cell

• a form of active transport that uses transport proteins to move molecules against their concentration gradient