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Cell Communication

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by

Alisa McElroy

on 21 July 2011

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Transcript of Cell Communication

CELL COMMUNICATION How Cells Communicate TOUCH CHEMICAL
SIGNALS ...requires direct cell to cell contact Paracrine

Endocrine

Neuronal Hypothalamus Pineal Gland Pituitary Gland Thymus Thyroid Gland Pancreas Adrenal Glands Testis Ovaries Hormone(s) Target melatonin



growth hormone



thymosin



thyroxine



insulin/glucagon



epinephrine



testosterone



estrogen/progesterone pituitary gland



brain



bones (osteoblasts)



immune (leucocytes)



ALL cells



liver


heart


sperm


ovum Function... ...rapid response to stimuli Nervous System CNS
Central Nervous System PNS
Peripheral Nervous System Sensory motor somatic autonomic sympathetic parasympathetic brain & spinal cord

processes information

protected by: meninges
cerebrospinal fluid
blood brain barrier ...detects exernal stimuli and internal conditions Flow of Information... Reflexes... CELL TYPES Glial Cells Neurons support and assist neurons

two types: Schwann Cells
astrocytes transmit information rapidly by electric and chemical signals

Flow of information: dendrite > cell body > axon hillock > axon > synaptic terminals > synapse > target cell Action potential... ...nerve impulse >> electrical wave that travels through a neuron

caused by the movement of ions sodium ions (Na+)

potassium ions (K+)
Full transcript