ch.6 last part.docx - Cell to cell communication 1 Local...

This preview shows page 1 - 2 out of 3 pages.

Cell to cell communication 1. Local communication a. Gap junctions create cytoplasmic bridges b. Contact-dependent signals require cell to cell contacts 2. Local communication was paracrine and autocrine signals 3. Long distance communication was chemical and electrical signals 1) Modulation of signal pathway responses a) Down regulation i) Decrease in receptor number b) Desensitization i) By binding a chemical modulator to a receptor c) Up-regulation i) Inserts more receptors in cell membrane 2) Long distance communication a) The nervous system uses a combination of chemical and electrical signals for long distance cell to cell communication b) Neurocrines are chemical signals secreted by neurons i) Neurotransmitters ii) Neuromodulators iii) Neurohormones ( chemicals released by neurons into the blood for action at target cells) 3) Signal pathways a) Receptor proteins b) A cell responds to a particular chemical signal only if the target has a receptor, binding protein c) The signal pathway i)

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture