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Science Ch 2 Review
Question | Answer |
---|---|
smallest structure that carries out activities necessary for life | cell |
structure that performs a specific function within a cell | organelle |
all cells share these 3 features | cell membrane, nucleus, cytoplasm |
the outer covering of the cell | cell membrane |
In addition to the cell membrane plants have this outer covering | cell wall |
controls activities of a cell and carries genetic information | nucleus |
gel-like material that surrounds all parts of the cell within the cell membrane | cytoplasm |
Special organelle found in plants that combines energy from sunlight with water and CO2 to create glucose | chloroplast |
Process of combining energy from sunlight with water and CO2 to create glucose | photosynthesis |
the spread of particles evenly through a liquid or gas | diffusion |
the simplest kind of diffusion in which particles move from an area of high concentration to an area of low concentration | passive transport |
diffusion through a membrane in which certain particles are filtered out | osmosis |
movement of particles from an area of low concentration to an area of high concentration (requires energy) | active transport |
green pigment found in cloropolasts that allow them to capture energy from sunlight | chlorophyll |
this simple sugar is created during photosynthesis | glucose |
organelle in which respiration takes place | mitochondria |
this process is the opposite of photosynthesis | respiration |
the process which allows organisms to grow | cell division |
as cells divide they differentiate and ... | specialize |
a group of cells that have a common structure and function | tissue |
type of cells that cover surfaces | epithelial |
type of tissue that joins other tissues together | connective |
tissue that creates movement | muscle |
several types of tissue that work together to perform one or more functions | organ |
system that provides body with oxygen | circulatory system |
system that removes liquid wastes | urinary system |
system that supports body and enables movement | musculoskeletal system |
system that obtains nutrients from food | digestive system |
system that contols movements and other organs | nervous system |
largest organ in the human body | skin |
system that produces hormones to signal changes in the body | endocrine system |
chemicals produced by glands that act as messengers in the body | hormones |