Download Muscle Cells

Muscle Cells
Skeletal Muscle
Smooth Muscle
Cardiac Muscle
Muscle cells are very active cells. There are three types of muscle cells in the body. One of
the types is the skeletal muscle. Skeletal muscles are responsible for moving your body in
many different ways though out the day. They are said to be voluntary. Voluntary means we
make them move. Another type is the smooth muscle cells. Smooth muscle cells are found in
structures such as the stomach, blood vessels, and intestines. Smooth muscles are not
consciously used. They are considered involuntary. Involuntary means not consciously used.
The last type of muscle tissue the body has is called cardiac muscle tissue. Cardiac muscle
tissue is found only in the heart. Cardiac muscle is involuntary and never stops working.
All three of these types of cells must use large amounts of energy. The energy is called ATP.
The ATP in a cell is made in the mitochondria. Mitochondria are also called the powerhouse of
the cell. The process that occurs in the mitochondria is called cellular respiration. Cellular
respiration makes ATP. All MUSCLE cells use large amounts of ATP. So that means that muscle
cells have MORE MITOCHONDRIA than any other cells in the body.
Questions:
1. What are the three hardest working types of cells in the body?
2. What organelle is found in abundance in the muscle cells? (hint: makes ATP)
3. What is the process that occurs in the mitochondria that makes the ATP?
4. Which group of body systems would muscle cells work most closely with?
a.
b.
c.
d.
Nervous, muscular, excretory
Skeletal, excretory, respiratory
Skeletal, muscular, digestive
Excretory, nervous, immune