Integrated Science- biology
Terms
undefined, object
copy deck
- What is the first level of organization of living things?
- the cell
- Each cell has a special shape so that it can carry out a particular activity,this is called ..
- cell specialization
- What is a tissue and what level of organization is this?
- A tissue is a group of struturely similar cells performing a similar activity.This the second level of organization.
- Two or more tissues working together to carry out a common function is called ...what level of organization is this and give 2 examples
- an organ,third level,animals-lungs,kidney,plants-stems,leaves.
- What is a system ,what is the level of organization ?Give 2 examples.
- A system is 2 or more different organs working together to carry out a common function
- What is the responsibility of the digestive system?
- It is responsible for the breaking down of complex,insoluble foods to simple soluble forms.
- Name three organs in the digestive system.
- oesophagus,intestines,liver
- Name 3 organs in the respiratory system.
- nostrils,trachea,lungs
- What is diffusion?
- Diffusion is the net movement of particles from an area of high concentration to an area of low concentration along a diffusion gradient.
- What is a diffusion gradient?
- Diffusion gradient is the difference in concentration between 2 regions before diffusion occurs.
- Where does diffusion take place?
- Diffusion can take place in gases and liquids.
- When does a diffusion gradient occur?
- When there is a difference in the number of molecules or concentration of molecules between two regions
- _________ is very important in the movement of molecules and ions in and out of the cell.
- diffusion
- Explain an example of diffusion in humans
- Diffusion occurs in lungs.Carbon dioxide diffuses from the blood where it is at higher concentration into the lungs where it's concentration is lower.
- Give an example of diffusion in amoeba.
- In amoeba waste such as ammonia are at a higher concentration in the cell than in it's surrounding environment-water.Hence ammonia diffuses from the cell into the surrounding medium.
- Why is diffusion also important in digestion?
- Some of the products in digestion are aborbed from ileum (small intestines)of mammals by diffusion.
- How does diffusion help plants?
- Plants need carbon dioxide for photosynthesis.This diffuses from the air into the leaves through the stomata.This is because carbon dioxide is in a higher concentration ouside the leaves therefore it moves into the leaves where it is in a lowerconcentration
- The net movement of molecules (usually water) from an area of high concentration to an area of low concentration across a selectively permeable membrane is called..
- Osmosis
- Selectively permeable means..
- only water and some substances can pass through the membrane but other substances cannot.
- There are three types of processes that facilitate movement in different organisms,they are..
- diffision,osmosis and active transport.