Zadanie 10
Chemical messages coordinate cells and whole organisms. (a) Describe bacterial quorum sensing. (b) Outline roles of calcium ions in animal-cell signalling. (c) Explain how plant hormones regulate growth through signalling.
Functional classes of animal signals
Distinguish hormones, neurotransmitters, cytokines and calcium signals by their roles in communication.
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Zadanie 18
Consider three possible chemical signals in an animal. I. A cytokine released by an immune cell II. A pulse of cytosolic calcium ions III. A neurotransmitter released at a synapse Which can convey information in cell signalling? A. I only B. II and III only C.…