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Description
Flashcards by elinor.smith, updated more than 1 year ago
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Created by elinor.smith
almost 10 years ago
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| Question | Answer |
| Definition of Osmosis | the movement of water from an area of high water concentration to an area of low water concentration through a selectively permeable membrane. |
| Definition of Diffusion | the movement of particles in a gas or liquid which move from where they are in a high concentration to a low concentration down a concentration gradient. |
| Respiratory system equation | glucose+oxygen -> carbon dioxide+ water+energy |
| movement through the respiratory system | mouth/nose trachea Bronchus bronchioles alveoli where the oxygen is exchanged for carbon dioxide. |
| what are chemical reactions of photosynthesis within the cells controlled by? | Enzymes |
| equation for photosynthesis | water+carbon dioxide-> Glucose+oxygen |
| specialised cells. plants and cells=? allows them to do what? adapts to its function by..? | plants and cells = multicellular become specialised e.g red blood cells. by having a large surface area for efficient absorption of oxygen. |
| function of the nucleus | stored DNA and controls the cell. |
| Function of the cell membrane | it controls what goes in and out of the cell. |
| Function of cytoplasm | where chemical reactions take place |
| Function of chloroplast | where photosynthesis takes place |
| Function of the cell wall | helps plants keep their shape |
| Function of the vacuole | contains cell sap and helps cells keep their shape |
| What does the Nucleus contain? | Genes |
| what is the cell wall only found in? | plants |
| what two structures are not seen in an animal cell? | vacuole and chloroplast |
| what are types of hormones? | testosterone, oestrogen, insulin and thyroxin |
| what is muscle tissue made of? | actin + myosin |
| what types of enzymes are there? | lipase, protease, amylase, urease and catalase |
| why does food need to be digested? | molecules like starch, fat and protein are insoluable and to be absorbed they need to be small and soluable |
| why do smokers cough? | they take in things like tar,dust, bacteria and other particles that clogs up. |
| what does the cilia do? | it beats the mucus up in waves up the trachea, which the smokers then cough up. |
| what is a boiled enzyme? | denatured |
| what do enzymes work best at? | a particular PH |
| what is the lock and key theory? | its when a substrate molecules joins with a enzyme. a reaction happens and the substrate molecules breaks off into two substrate molecules called proteins. |
| Antibodies =? | a specialised protein involved in defending the body from foreign invaders. |
| what are contractile proteins responsible for? | movement (muscle contraction) |
| what are enzymes referred to? | a catalyst (speed up a chemical reaction and can be used over and over) |
| what are hormonal proteins? | they are messenger proteins that help to coordinate certain bodily activities. |
| what happens when you test a leaf in starch? | the leaf gets soaked in water to soften it. then its soaked in alcohol. the alcohol removes the chlorophyll from the leaf which is then soaked in Iodine. the leaf turns black where photosynthesis has happened |
| what is a transect used for? | to measure the change in species distribution. |
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