Question

label each of the three cell parts with its main function.
control which substances
enter and leave the cell
direct cell activities by
sending instructions to
different parts of the cell
break down sugar and
release energy that the cell
can use
fill the space between the
cell membrane and the
nucleus
sort and package proteins
and other substances
make lipids and steroid
hormones and help the
ribosome make proteins

Explanation:

• Nucleus: Directs cell activities by sending instructions to different parts of the cell.
• Cytoplasm (the part that fills the space between the cell membrane and the nucleus): It is a jelly - like substance that fills the space between the cell membrane and the nucleus.
• Cell membrane: Controls which substances enter and leave the cell.
• Mitochondria (the red - bean - shaped organelles that break down sugar and release energy): Breaks down sugar and releases energy that the cell can use.
• Endoplasmic reticulum (if there is a structure that makes lipids and steroid hormones etc., assume it's rough or smooth ER. Smooth ER makes lipids and steroid hormones): Makes lipids and steroid hormones and helps the ribosome (if we consider ribosomes attached to rough ER, but generally ribosomes make proteins on their own. However, if we assume the function of making proteins is for ribosomes and the lipid - making part is for ER)
• Golgi apparatus: Sorts and packages proteins and other substances.

Answer:

• Nucleus: Direct cell activities by sending instructions.
• Cytoplasm: Fill the space between cell membrane and nucleus.
• Cell membrane: Control substance entry and exit.
• Mitochondria: Break down sugar, release energy.
• Endoplasmic reticulum (smooth): Make lipids and steroid hormones.
• Golgi apparatus: Sort and package proteins and substances.