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Signal transduction occurs when an extracellular signaling molecule activates a cell surface receptor. In words, this receptor change intracellular molecules changes a response. There are two levels in this procedure: the signaling molecule activates a particular receptor protein on the cell membrane. A 2nd messenger transfers the signal into the cell and eliciting a physiological response. In either level the signal can be amplified. Whereas, one signalling molecule can cause several responses. Gene activations and metabolism alterations are instances of cellular responses to extracellular stimulation which requires signal transduction.
What has caused evolution? 1) Different individuals have dissimilar characteristics 2) These differences result in altering abilities to reproduce under local circumstances
Types of Community On the basis of size and degree of relative independence communities may be divided into two types: i) Major Community: These are large-sized, well org
INTERMEDI A T E FILAMENTS These are non-living structures. Made up of different types of protein eg. Keratin, synemin, desmin and vimentin. These are divided into four
the evolution of gamatophyte in pteridophyte
Define sexual reproduction
What do digestive enzymes do to food? Digestive enzymes suspend food; make food soluble, break large insoluble food molecules into smaller, soluble molecules
Describe the term Physiotherapy? Patients who are sedated, intubated and ventilated are not able to deep breathe, cough and clear secretions. Hence, it is important to do chest
Four major groups of lipoproteins help in transport of lipids. These include: 1. Chylonzicrons-function is to carry dietary triacylglycerols 2. Very low density lipoprot
What is Physiology and Hemodynamic ? Normally, in the post-natal circulation the pulmonary and aortic circuits are in series so that the deoxygenated blood coming into the righ
What is a population? In Biology a population is a set of individuals of the similar species living in a given place and in a given time.
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