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Flashcards in 8. Signalling between cells I Deck (6)
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1

4 Reasons cells need to communicate

1. Process information
Sensory stimuli (e.g. sight, sound)
2. Self-preservation
Spinal reflexes and Sympathetic nervous system
3. Voluntary movement
Daily activities
4. Homeostasis
Thermoregulation and Glucose homeostasis

2

4 Modes of intercellular signalling

Endocrine
Paracrine
Autocrine
Signalling by membrane attached proteins

3

Endocrine signalling

Hormone travels within blood vessels to act on a distant target cell e.g. Glucagon from pancreas, Adrenaline

4

Paracrine signalling

Hormone acts on an adjacent cell e.g. Insulin within pancreas, Nitric Oxide

5

Signalling between membrane attached proteins

Plasma membrane proteins on adjacent cells interacting e.g. APC's and T-lymphocytes

6

Autocrine signalling

Signalling molecule acts on same cell
e.g. IL-2 on T-lymphocytes