Metabolism module Introduction to Hormones

Communication is the key
• Multi-cellular organisms stay together
because cells communicate
– When they come into contact (autocrine) Communication is the key
• Multi-cellular organisms stay together
because cells communicate
– When they come into contact (autocrine)
• Cell surface chemicals
– When they are close (paracrine)
• Local diffusion of chemical messengers
– When they are far apart (endocrine)
• Chemical messengers in the blood stream (Hormones)
• Electrical transmission (Nerves)
• Cell surface chemicals
– When they are close (paracrine)
• Local diffusion of chemical messengers
– When they are far apart (endocrine)
• Chemical messengers in the blood stream (Hormones)
• Electrical tCommunication is the key
• Multi-cellular organisms stay together
because cells communicate
– When they come into contact (autocrine)
• Cell surface chemicals
– When they are close (paracrine)
• Local diffusion of chemical messengers
– When they are far apart (endocrine)
• Chemical messengers in the blood stream (Hormones)
• Electrical transmission (Nerves) ransmission (Nerves)