Level 5 Science Ch. 2

What part of a cell allows certain materials to enter the cell and other materials to exit the cell?

• nucleus

• vacuole

• cytoplasm

• cell membrane

Which process do most cells use to get energy?

• digestion

• excretion

• respiration

• photosynthesis

Red blood cells look like small, smooth, flexible saucers. How does this shape help them perform their function?

• The shape gives the cells more strength

• The shape allows the cells to cover a surface

• The shape helps the cells move through blood vessels

• The shape enables the cells to quickly send signals to the brain

In which body part would you find cells with ahir-;like structures?

• heart

• brain

• lungs

• mouth

Which choice below shows the order of organization in an animal from simplest to most complex?

• organ system, organ, tissue, cell

• cell, tissue, organ, organ system

• tissue, cell, organ system, organ

• cell, organ, tissue, organ system

What makes up muscle tissue?

• a single muscle cell

• a group of muscle cells

• a group of muscle organs

• groups of muscle organs and nerve cells

Which two organ systems work together to move the body?

• muscle system and skeletal system

• muscle system and digestive system

• nervous system and digestive system

• respiratory system and nervous system

A cell has branch-like structures. Which organ did this cell most likely come from?

• skin

• brain

• heart

• lungs

Which choice below produces energy for plant and animal cells?

• nucleus

• cytoplasm

• vacuole

• mitochondria

Which of the following statements is true about all cells in plants and animals?

• All cells have the same shape

• All cells have chloroplasts

• All cells have a cell membrane that can be compared to your skin

• All cells have a tough cell wall surrounding the cell membrane