Which structures carry out life functions within cells?

A. organ systems

B. organelles

C. organs

D. tissues

The illustration above shows a process performed by a cell to maintain homeostasis. What is this process?

A. mitosis

B. photosynthesis

C. the removal of wastes

D. the intake of nutrients

Cells are specialized to do certain jobs. For instance, muscle cells are in constant motion and require a lot of energy to work. Muscle cells contain more of which organelle?

A. cell wall because it produces energy for the cell

B. chloroplasts because they produce energy for the cell

C. cell membrane because it produces energy for the cell

D. mitochondria because they produce energy for the cell

Which organelle may often be referred to as the "gate keeper" because it controls what goes in and out of the cell?

A. the cytoplasm

B. the nucleus

C. the cell membrane

D. the mitochondrion

Which of the following is a function of the mitochondria in a cell?

A. The mitochondria fold proteins into new shapes.

B. The mitochondria create the most energy for the cell.

C. The mitochondria regulate what enters and exits the cell. D. The mitochondria use the sun to undergo photosynthesis

The muscular system requires cells that can produce a lot of energy. Which organelle is responsible for producing energy in a muscle cell?

A. nucleus

B. lysosome

C. membrane

D. mitochondrion

Which BEST describes the role of mitochondria in maintaining homeostasis for the cell?

A. Mitochondria control what crosses into and out of the cell.

B. Mitochondria manufacture and deliver proteins for the cell.

C. Mitochondria aid in the movement of organelles around the cell.

D. Mitochondria produce most of the energy that is used by the cell.