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Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

Feedback Loops

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

Internal Receptors

Internal Receptors

Many cellular signals are hydrophilic and therefore cannot pass through the plasma membrane. However, small or hydrophobic signaling molecules can cross the hydrophobic core of the plasma membrane and bind to internal, or intracellular, receptors that reside within the cell. Many mammalian steroid hormones use this mechanism of cell signaling, as does nitric oxide (NO) gas.

Proofreading

Proofreading

Cross-reactivity

Cross-reactivity

Allergic Reactions

Allergic Reactions

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Related Experiment Video

Updated: Mar 22, 2026

Analysis of Circadian Photoresponses in Drosophila Using Locomotor Activity

Analysis of Circadian Photoresponses in Drosophila Using Locomotor Activity

The authors reply

Yang Liu¹, Yu-ming Li

¹Graduate School of Tianjin Medical University, Tianjin, China, and Medical Intensive Care Unit, Pingjin Hospital, Logistics College of the Chinese People's Armed Police Forces, Tianjin, China Tianjin Key Laboratory of Cardiovascular Remodeling and Target Organ Injury, Institute of Cardiovascular Disease and Heart Center, Pingjin Hospital, Logistics College of the Chinese People's Armed Police Forces, Tianjin, China.

Critical Care Medicine

|April 16, 2016

Summary

No abstract available in PubMed .

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