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Related Concept Videos

Feedback Inhibition00:46

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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!
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Contact-dependent Signaling01:19

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Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
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Related Experiment Video

Updated: Mar 2, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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The authors reply

Kaitlin M Best1, David Wypij, Lisa A Asaro

  • 1Cardiac Intensive Care Unit, Department of Nursing, Respiratory Care and Neurodiagnostic Services, The Children's Hospital of Philadelphia, Philadelphia, PA; Department of Cardiology, Boston Children's Hospital, Boston, MA; Department of Pediatrics, Harvard Medical School, Boston, MA; and Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA; Department of Cardiology, Boston Children's Hospital, Boston, MA; Ellen and Robert Kapito Professor of Nursing Science, Department of Family and Community Health in the School of Nursing at the University of Pennsylvania, Philadelphia, PA; and Department of Anesthesia and Critical Care Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.

Critical Care Medicine
|May 17, 2017
PubMed
Summary

No abstract available in PubMed .

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