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Description
Flashcards by Ilyass Jalloh, updated more than 1 year ago
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Created by Ilyass Jalloh
over 9 years ago
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| Question | Answer |
| B2 Tissues , Organs and Organ Systems | AQA Additional Science |
| What is Diffusion ? | spreading of particles in a gas from areas of high concentration to areas of lower concentration |
| When is diffusion faster ? | when there is a greater difference in concerntration |
| What are tissues ? | small group of cells |
| What are tissues ? | a group of cells with similar structure & function |
| What is the function of muscular tissues ? | to contract and bring about movement |
| What is the function of glandular tissues ? | to produce substances such as enzymes & hormones |
| What is the function of epithelial tissues ? | to cover some parts of the body |
| What are organs made up of ? | tissues |
| What is the role of muscular tissues in the stomach ? | to churn the contents of food |
| What is the role of glandular tissues in the stomach? | to produce digestive juices ( acid & enzymes) |
| What is the role of epithelial tissues in the stomach ? | to cover the inner & outer surfaces of the stomach |
| What does the digestive sytem include ? | glands & stomach & small intestine liver large intestine |
| What is the function of glands in the digestive sytem ? | pancreas & salivary produce digestive juices |
| What is the function of the stomach in the digestive system? | to Digest food |
| What is the function of the small intestine in the digestive sytem ? | to Digest & absorb soluble food |
| What is the function of the large intestine in the digestive system ? | to Absorb water from undigested food, producing faeces |
| What are the main plant organs ? | Roots Stems Leaves |
| What is the function of epidermal tissues in a plants ? | to cover the plant |
| What is the function of Mesophyll in plants ? | to carry out photosyntheses |
| What is the function of Xylem and phloem in plants ? | to transport substances around the plant |
| What are leaves adapted for in plants ? | to absorbing sunlight for photosynthesis. |
| What are the main ways that leaves are adapted ? | Chlorophyll & Large SA + Stomata Thin & Network of Veins |
| What is the purpose of Chlorphyll in a plant ? | to absorb sunlight |
| What is the purpose of a Large SA in a plant ? | to absorb MORE sunlight |
| What is the purpose of a stomata in a plant ? | To let CO2 diffuse into the leaf |
| What is the purpose of a thin in the leaves of a plant ? | Short distance for carbon dioxide to diffuse into leaf cells |
| What is the purpose of a network of veins ? | To support the leaf & transport water + carbohydrates |
| What is the purpose of the adapataion of a thick waxy cuticle ? | To protect the leaf without blocking light |
| What is the purpose of the adaptation of a Thin & transparent epidermis in plants ? | To allow more light to reach the palisade cells |
| What is the purpose of the adaptation of a Layer of palisade cells on the top surface ? | to absorb light |
| What is the purpose of many chloroplasts in the palisade cells ? | To increase the absorption of light |
| What is the purpose of the adaptation of a Spongy mesophyll inside the leafs of a plant ? | 1. to give air space so CO2 can diffuse through the leaf 2. To increase the SA |
| What are Organ Systems ? | a group of organs that perform a particular function |
| What is the function of liver in the digestive system ? | to produce bile |
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