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How do negative and positive feedback loops occur and how are they different?

Think of them as a flow chart. Stimulus (a change) | Sensor (detects the change) | Control (sends a signal about the change) | Effector (response to the change) (connect a line to Stimulus) Negative feedback...
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Answered by Emma C. • Biology tutor
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How to write an essay on: The importance of proteins in the control of processes and responses in organisms.

Explain the use of proteins as enzymatic catalyats - including examples. Enyzmes control metabolic pathways - such as in the Krebs cycle. Proteins/enzymes in photosynthesis - with examples. Control of moveme...
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Answered by Eva B. • Biology tutor
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Describe the process of extracellular digestion

Extracellular digestion is a process in which an organism feeds by secreting enzymes through its cell membrane and on to the food. These enzymes then catalyse the breakdown and the digestion of the food. Onc...
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Answered by Stuart N. • Biology tutor
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What are the risks and benefits concerning genetic modification of crops?

With the world population increasing exponentially, the concept of genetic engineering can be viewed as a sustainable way to feed people. Crops can be genetically modified to improve certain characteristics ...
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Answered by Alyssa A. • Biology tutor
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The drug Atropine blocks the action of of acetylcholine on structures innervated by post-ganglionic cholinergic neurones.

State precisely which part of the nervous system will be affected by atropine and suggest why atropine might be used during anesthesia. Answer: It acts on the parasympathetic branch of the autonomic nervous ...
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Answered by Rana M. • Biology tutor
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