Living Things are Made of Cells
What are cells?
basic units of life
What is the function of mitochondria?
use oxygen to break down food and release energy
What is one of the most important properties of water for life?
its ability to dissolve other chemicals
What are the basic activities of living things?
getting food, using food, removing wastes, movement, sensing and responding, growth, development, and reproduction
Name an organ.
heart, lungs, stomach, liver, kidneys, eyes, roots, stems, and leaves
What is the function of a cell's nucleus?
store DNA, which controls many of the characteristics of living things
How does your body use carbohydrates and fats?
for energy
How do animals and plants get food?
Animals must eat plants or other animals. Plants use the energy from sunlight to make carbohydrates from carbon dioxide and water.
What are tissues made of?
groups of cells that are similar and act together to do a certain job
What is the function of chloroplasts?
capture light from the sun to make food
What do proteins do in your body?
provide energy, help build body parts, and control body activities, such as heart rate and the breaking down of food in the body
What is the difference in the way animals and plants move?
Animals can move from place to place. Plants cannot move from place to place, but are able to move their parts, such as their stems and leaves.
What are organs made of?
different kinds of tissues
What do plant cells and animal cells have in common?
cell membranes, cytoplasm, a nucleus containing DNA, ribosomes, mitochondria, vacuoles, endoplasmic reticulum, and Golgi bodies
What are vitamins and minerals?
nutrients that the body needs in small amounts only
Contrast growth and development.
Growth is an increase in size. Development means changing over time.
What is a function of cells?
covering and protection, movement, support, sending and receiving messages, transporting materials, and fighting diseases
How do plant cells differ from animal cells?
plant cells have cells walls and animal cells do not; all plant cells have only one nucleus; plant cells have chloroplasts and animal cells do not; plant cells use chloroplast to produce energy while animal cells use mitochondria; plant cells may have only one large vacuole while animal cells tend to have many small ones; plant cells do not have lysosomes as animal cells do
How can you get all the nutrients you need?
eating a variety of foods every day
What does "sensing and responding" mean?
picking up signals from the surroundings and then changing because of these signals