Life Science January 23, 2015

All cells have an outer covering called a membrane. Agree (Plant cells have this between the cell wall and the inside) Phospholipid bilayer

The inside of a cell is like jello. Agree This gel like substance is called cytoplasm.

Most human cells are about the same size as a bacterium. Agree

Some human cells can be as long as one meter long. Agree

Some cells can change shape. Agree

One way to group cells is by the presence or absence of a nucleus. Agree Eukaryotic vs. Prokaryotic

Most cells in your body have the same function Most cells in your body have the same function. Only when they are grouped into tissues do they have different jobs. Agree

All cells have an outer covering made of cellulose, the same woody material that a tree has. Disagree Only plant cells

One of the main components of the cell membrane is fat. Agree Phospholipids “lipid” means fat containing

Many substances can move through the cell membrane to enter a cell. Agree A process called diffusion

Cells have a skeleton. Agree Cytoskeleton a series of intercellular proteins that help a cell with shape, support, and movement. A dynamic structure, parts of often which are destroyed, renewed or newly constructed.

Organelles are “little organs”. Agree Organelles carry out specific functions within the cell. Mitochondria Endoplasmic reticulum Ribosomes Lysosomes Vacuole Golgi Body

Cells have a “director” like a boss, who tells everyone their job Cells have a “director” like a boss, who tells everyone their job. This boss is the mitochondrion. Disagree Mitochondria are know as the “powerhouses” of the cell because they convert energy in food molecules to energy the cell can use to carry out its functions. The nucleus is the cell’s control center, directing all of the cell’s activities.

All the instructions for the functions of a cell are found in the DNA. Agree The general term is chromatin, but DNA is in chromatin. We will study this more in cell reproduction, the next unit.

There are really only three main differences between an animal and plant cell. Agree: Chloroplasts, Cell Wall and Vacuole (Plants cells have one that is large, animal cells have many)

Chloroplasts in animals cells use sunlight, carbon dioxide and water to make food. Agree Photosynthesis

Cells contain power plants, called mitochondria that release energy. Agreed Most of the cell’s energy is produced within these rod-shaped organelles.

Cells have to get pre-made protein to build new cells from their food. Disagree Ribosomes are small structures function as factories to produce proteins. They may be attached to the endoplasmic reticulum, or they may float in the cytoplasm.

Cells have a subway system to move materials from one part of the cell to another. Agree Golgi Body

Cells have parts dedicated to manufacturing, transporting, packaging, storing, and recycling proteins and other materials. Agree

A cell can eat itself up from the inside out when it gets too old. Agree Lysosomes can recycle all matter by breaking it down in a useable form for the cell.

Cells combine to make tissues, tissues make organs, organs make systems and systems make an organism. Agree