Feed-forward is used to describe the action of muscles.
<h3>What is Feed-Forward in the body?</h3>
- In physiology, a feed-forward homeostatic control system (also called a feed-forward homeostatic control system) enables the system to predict changes in regulatory variables.
- It predicts changes by virtue of the predictive effect of one intermediate on another further down the signaling pathway.
- Feed-forward or anticipatory control mechanisms permit the body to predict a change in the physiology of the organism and initiate a response that can reduce the movement of a regulated variable out of its normal range (7, 23).
- Impairments are measured and taken into account before they affect the system.
- In the house example, a feed-forward system could sense when a door is open and automatically turn on the heating before the house gets too cold.
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The roots of a mangrove grow in salt water.
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M phase, or mitosis.
(You don't need to know this for your course but more properly cell division could also refer to meiosis or binary fission.)
The correct answers are:
- Methylation of histone tails in chromatin can promote condensation of the chromatin.
- DNA is not transcribed when chromatin is packaged tightly in a condensed form.
- Acetylation of histone tails is a reversible process.
- Some forms of chromatin modification can be passed on to future generations of cells.
- Acetylation of histone tails in chromatin allows access to DNA for transcription.
Histone modifications are post-translational modifications of histone protein that can affect gene expression by altering chromatin structure or recruiting histone modifiers.The most common modifications are methylation, phosphorylation, acetylation and ubiquitylation. All of them affect the binding affinity between histones and DNA and thus loosening (gene activation) or tightening (gene repression) the condensed DNA.
Histone methylation is a transfer of methyl group by histone methyltransferases to lysine or arginine amino acid of protein. Effect of methylation depends on the type of protein that is modified. Demethylation is the reverse process.
Histone acetylation is the process of adding of an acetyl group(by histone acetyltransferases) to histone proteins and it can also activate or inhibit the gene expression. Deacetilation is reverse process.
