31 terms

Biology 7.4 homeostasis and cells

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the basic living unit of all organisms
What are cells?
unicellular organisms
What type of organisms dominate life on Earth?
a relatively constant internal physical and chemical condition
What is homeostasis?
unicellular organisms grow, respond to the environment, transform and reproduce
How do unicellular organisms maintain homeostasis>
both
Are unicellular organisms are included in prokaryotes or eukkaryotes?
some algae found in oceans, lakes, and streams
What is an example of a unicellular organism with chloroplast?
bacteria
What type of prokaryotes cells are almost everywhere?
protozoans
What is an example of a eukaryotes celled organism?
they do not live on their own, they work together
What makes the multicellular cells in the human body different for other unicellular organisms?
the cells of multicellular organisms become specialized for particular tasks and communicate with one another
How do multicellular organisms maintain homeostasis?
they are specialized
WHat makes each cell of a multicellular organism different?
it has a specific way to move, react, and produce substances
what does it mean for a cell to be specialized?
organized into tissues
How are multicellular organisms organized?
into organs
How are the tissues organized?
organ systems
How are the organs organized?
a tissue
What is a group of similar cells that perform a particular function called?
organ
What is formed when the tasks are too complicated to be carried out by just one type of tissue?
muscles
WHat is an individual tissue in the human body?
nervous and connective
What type of tissues make up the muscles in the human body?
organs
What completes specialized tasks in the human body?
organ systems
What is a group of organs that work together to perform a specific function?
stomach, pancreas and intestines
What organs make up the organ system called the digestive system?
specialization and interdependence
What are the two remarkable attributes of living things that are need for organs to work?
through chemical signals received through receptors
How do cells communicate in large organisms?
speed up or slow down the activities of the cells that receive them and cause them to change
What do the chemical signals do?
cellular junctions
What is the connection formed between the cells in organs like the heart and the liver?
receptor
What responds to the cells signal?
pacemaker
What changes the signals in the heart through an electrical signal?
from least complex to most complex(cells, tissues, organs, and organ systems)
What are levels of organization
They came from prokaryotic cells
Where do scientist believe eukaryotic cells come from?
because they have no cell wall and can burst
Why is osmotic pressure more dangerous to animal cells than plant cells?