CK-12 Biology Chapter 3

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According to cell theory, all organisms are made up of what?

cells

What are some ways things move in and out of the cell?

diffusion, osmosis, active transport and passive transport

What is cytoplasm?

everything that is inside the plasma membrane

What does philic mean

liking

What does phobic mean

not liking

Where are proteins formed?

ribosomes

What are ribosomes?

the place in the cytoplasm where proteins are made

What is osmosis?

A special kind of diffusion, the higher concentration is still spreading to the lower concentration - but it has to pass a membrane in order to get there

What is the difference between active transport and passive transport?

Active transport requires energy

According to the cell theory, how many life functions occur within cells?

All of the life functions

According to the cell theory, where do all cells come from?

Already existing cells

What does a nucleus hold?

DNA

What type of cell has a nucleus?

Eukaryotic

What does the cytoskeleton do?

Helps the cell holds its shape

What instructions does the DNA carry?

Instructions for making protein in the cells

Cells have different shapes. What for?

It helps them with their different jobs

What is a plasma membrane?

It is a thin coat that surrounds the cell

What does the cell membrane do?

It protects the cell! It also lets some things in, and keeps some things out

What three things does the cytoplasm do?

It pushes against the plasma membrane to hold it in place. It holds the cell organelles. It provides a place for things to happen inside the cell.

How is the golgi apparatus like a post office?

It receives things, packages and labels them, then sends them on

What is homeostasis?

It's like reacting to changes, and trying to keep things the same. Like your own personal thermostat!

What is the plasma membrane filled with?

Jelly like cytoplasm

What is cell transport?

Moving things in and out of the cell

Which kind of cell has long tendrils that reach out?

Nerve cell

What are the systems that help the body keep its "thermostat" the same (homeostasis)?

Nervous, Endocrine, Digestive, Excretory, Musculoskeletal, and Immune systems

Do all cells have the same shape?

No

What is the control center of the cell?

Nucleus

What are the parts that all cells have in common?

Plasma membrane, cytoplasm, ribosomes and DNA

What type of cell does not have a nucleus?

Prokaryotic

What is an example of diffusion?

Putting food coloring in a glass of water. The food coloring spreads out all throughout the glass

Who named the blob in the middle of a cell the "nucleus"?

Robert Brown

Who discovered cells in a cork?

Robert Hooke

Who discovered cells in a piece of cork?

Robert Hooke

Which three scientists developed the cell theory?

Schwann, Schleiden and Virchow

The microscope helps us see cells. How many years ago was it created?

350 years

Which part of the cell is like a barrier to the outside?

The cell membrane

All living cells have some things in common. What are they?

They obtain and use energy, respond to their environment, and reproduce

What are some things that cells do?

Use energy, respond to their environment, reproduce

What does hydro mean?

water


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