Lesson 5 - Cell membrane and Homeostasis

Cell Membrane and Homeostasis

Multiple Choice

What is the outer covering of all cells called?

• Cell membrane

• Cytoplasm

• Nucleus

Multiple Choice

What can homeostasis be compared to?

• balance

• cell wall

• transport

• staying still

Multiple Choice

Homeostasis mechanisms...

• keep everything exactly the same.

• usually operate by positive feedback systems.

• act to keep the internal environmental conditions outside the normal range

• is the ability to maintain a relatively stable internal environment

Multiple Choice

Another term for equilibrium is...

• Not enough
• Too little
• Homeostasis
• Too much

Multiple Choice

ALL living cells must maintain homeostasis so all living cells MUST have this in common

• Nucleus
• Cell Membrane
• Cell Wall
• Mitochondria

Multiple Choice

What is this image?

• cell membrane
• mitochondria
• golgi apparatus
• endoplasmic reticulum

Multiple Choice

What is the purpose of the cell membrane?

• It only serves as protection

• It decides what comes in and out of the cell

• its the jelly substance found in cells

Multiple Choice

What does "bilayer" mean?

• one layer
• two layers
• laminated
• bilateral

Multiple Choice

The cell membrane is sometimes referred to as the plasma membrane or

• cytoplasm

• phospholipid bilayer

Drag and Drop

What is surrounding the cell membrane? Well, on the outer side of the cell membrane there is cellular fluid called ​

Placeholder

and on the inner side of the cell membrane is another jelly-like substance called the ​

Placeholder

.

Drag these tiles and drop them in the correct blank above

matrix

cytoplasm

Multiple Choice

A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails. 

• phospholipid 
• Carbohydrate
• Cholesterol 
• Protein 

Multiple Choice

Is the phosphate head hydrophilic or hydrophobic?

• hydrophilic

• hydrophobic

Multiple Choice

There are two parts of the cell membrane. What is the head made out of?

• phosphate

• lipids

Multiple Choice

Is the lipid tail hydrophilic or hydrophobic?

• hydrophilic

• hydrophobic

Multiple Choice

There are two parts of the cell membrane. What is the tail made out of?

• phosphate

• lipids

Multiple Choice

A phospholipid has 2 parts. What are they called? 

• Hydrophilic Head, Hydrophobic Tail 
• Hydrophobic Head, Hydrophilic Tail 

Multiple Choice

Maintaining a constant internal state in a changing environment.

• Homeostasis
• Active Transport
• Mitosis
• Photosynthesis

Multiple Choice

How does a cell maintain homeostasis?

• Regulates what enters and leaves the cell
• Flexibility
• Protective barrier
• Structure and support

Multiple Choice

Describes the arrangement of the cell membrane as bendable and made of many parts. 

• The Fluid Mosaic Model 
• The Major Mobility Model 
• The Crazy Cell Model
• The Maze Model

Multiple Choice

What forms the channels and pumps in the phospholipid bilayer?

• carbohydrates
• proteins
• hydrophilic heads 
• lipids

Multiple Choice

What is embedded in the phospholipid bilayer?

• proteins
• salt
• water

Multiple Choice

What is the cell membrane made out of?

• phospholipids and proteins

• carbohydrates and proteins

• lipids and cytoplasm