Chemical level 0.0 / 5 ? AllS for PUniversityAll boards Created by: Ciara SimpsonCreated on: 06-06-19 23:09 Positive feedback system Reinforces a change until blocked e.g labour 1 of 31 Negative feedback system Reverses change in condition e.g blood pressure 2 of 31 Homeostasis maintained by Core temperature, water and electrolyte balance, blood glucose levels, blood and tissue oxygen and CO2 levels, blood pressure 3 of 31 Feedback systems.. Disruption (stimulus), receptors detect change sending message to control centre eg brain sends onto effector, producing a response 4 of 31 Excretionary systems? Digestive system (indigestible food waste), urinary system (nitrogen filled wastes), respiratory system (exhales CO2) 5 of 31 Digestion is.. The breaking down of food into simple molecules so it can be absorbed by the blood (e.g nutrients to cells by the CV system) 6 of 31 Metabolism is regulated by.. Hormones (endocrine system) 7 of 31 Catabolism breaks down molecules into.. Simple building blocks 8 of 31 Anabolism synthesises Complex molecules from simple ones 9 of 31 What does ATP do? Powers cellular activity 10 of 31 Reproduction forms new cells eg.. Tissue growth, tissue repair/replacement, new individual 11 of 31 Growth is the increase of size of the body due to.. Increase of cells, or size of cells leading to increase of materials eg bone 12 of 31 Differentiation is.. Unspecialised cell to specialised cell 13 of 31 Endocytosis is.. Movement of substance into a cell in vesicles 14 of 31 Exocytosis is.. Movement of substance out of a cell in vesicles that fuse with membrane and release their contents 15 of 31 Active transport.. Substances can cross the membrane moving up concentration gradient. ATP is needed 16 of 31 Cytoplasm is made up of.. Cytosol and organelles 17 of 31 Cytosol is the site for.. Chemical reactions 18 of 31 What does cillium do and what is it made up of? Moves extracellular fluids, contains 20 microtubules and a basal body 19 of 31 Lysosomes contain? and do? Digestive enzymes that digest foreign bodies, microbes and dead organelles 20 of 31 Flagella are.. Surface projections that move the cell itself 21 of 31 Ribosomes contain and do? Contain RNA and protein, they are either free or attached to rough ER and are for protein synthesis 22 of 31 Perioxisome function? Deactivates toxic materials eg alcohol (oxidises substances and decomposes hydrogen peroxide) 23 of 31 What does a vesicle do? Imports materials from intracellular to extracellular 24 of 31 Cytoskeleton is responsible for? Cellular movement. Maintains shape and organisation 25 of 31 Cytoskeleton is made up of? X3 protein filaments; microfilaments, intermediate filaments and microtubules 26 of 31 Mitochondria are responsible for? Aerobic respiration (ATP synthesis) 27 of 31 Rough ER attaches to.. Nuclear envelope and has ribosomes 28 of 31 Smooth ER.. Has no ribosomes 29 of 31 The nucleus is surrounded by Lipid bilayer (inner, outer is continuous with rough ER) 30 of 31 Golgi complex is made of.. Flatterned sacs called cysternae (entry face, medial cisternae and exit face) for lipid and protein synthesis 31 of 31
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