Homeostasis

Labelling

Label the cell.

Drag labels to their correct position on the image

Mitochondria

Nucleus

CELLL MEMBRANE

ER

Golgi Body

Open Ended

Why is the cell membrane important for the survival of a cell?

Open Ended

What is homeostasis to you?

Multiple Choice

Which of the following is NOT a factor that must be kept in balance for survival?

• Temperature

• Blood pH

• Blood sugar

• Vitamin D levels

Open Ended

Why do you think the cell membrane is so important for maintaining homeostasis inside a cell?

Multiple Choice

What is diffusion?

• Movement from low to high concentration

• Movement from high to low concentration

• Movement of water only

• Movement of solids only

Multiple Choice

Which of the following best describes the meaning of 'semipermeable'?

• Only some things can go through it

• Everything can go through it

• Nothing can go through it

• It is made of two layers

Multiple Select

Select all correct statements about the cell membrane.

• It is also called the phospholipid bilayer.

• It allows only some molecules to pass through.

• It is completely impermeable to all substances.

• Small particles can diffuse through it easily.

Open Ended

What do you think 'bilayer' means? (Hint: Remember the prefix 'bi'!)

Multiple Choice

What are three other names for the cell membrane?

• Semipermeable membrane, phospholipid bilayer, plasma membrane

• Cell wall, cytoplasm, nucleus

• Mitochondria, ribosome, lysosome

• Chloroplast, vacuole, Golgi apparatus

Multiple Choice

Which part of the phospholipid bilayer is hydrophilic and which part is hydrophobic?

• The phosphate head is hydrophilic and the lipid tails are hydrophobic.

• The lipid tails are hydrophilic and the phosphate head is hydrophobic.

• Both the phosphate head and lipid tails are hydrophilic.

• Both the phosphate head and lipid tails are hydrophobic.

Multiple Choice

What are 3 other names for the cell membrane?

• Plasma membrane, phospholipid bilayer, selectively permeable membrane

• Cell wall, cytoplasm, nucleus

• Mitochondria, ribosome, lysosome

• Protein channel, lipid raft, carbohydrate chain

Multiple Select

Which of the following statements about channel proteins is/are correct?

• Channel proteins allow certain substances to enter or leave the cell.

• Channel proteins are shaped like a tunnel through the cell membrane.

• Channel proteins are only found in plant cells.

• Channel proteins are made of lipids.

Open Ended

How does the cell membrane help maintain homeostasis in a cell?

Multiple Choice

Which of the following best describes how a cell with too much potassium could maintain homeostasis?

• By using a channel protein to move potassium out of the cell

• By storing potassium in the nucleus

• By breaking down potassium into other elements

• By increasing the size of the cell

Open Ended

Why is the cell membrane also called the semipermeable membrane?

Open Ended

What is the function of a channel protein?

Multiple Choice

Which of the following organelles is responsible for producing energy in the cell?

• Nucleus

• Golgi Body

• Mitochondria

• Ribosome

Open Ended

Reflecting on today's lesson about cell organelles, which organelle do you think is the most important for the survival of the cell, and why?