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Hormonal Control: External Stimulus (Reception (Transduction (Response…
Hormonal Control:
External Stimulus
Reception
stimulus is recieved by receptor, and carried across cell wall and plasma membrane
Transduction
the receptor relays proteins and secondary messengers, ellicit response
Response
Cellular responses activated
w/ stimulus, hormones have local and long distance signaling
Local
Synaptic Signaling
= neuron comunication
Paracrine Signaling
= wound healing
Cell Junctions
= some cells are connected via cytoplasm, share directly thru pores (
gap juctions
, bc heart needs to beat in sync)
Long Distance
Endoncrine System
Hormones
Water Soluble Hormones (Hydrophilic)
Secretory cell, thru blood, to signal receptor, into target cell, into nucleus for gene regulation OR into cytoplasm for cytoplasmic response
remember
: cell membrane has
hydrophilic tails
and
hydrophobic heads
Lipid Soluble Hormones (Hydrophobic)
Lipid hormones are more long term than peptides
Secretory cell, needs transport protein to travel thru blood, enters target cell, enters nucleus, fits into receptor for gene regulation, then moves on to cytoplasmic response (No option, only 1 path thru nucleus to cyto)
Nervous System
, travel along
axons
, faster than blood
signaling molecules are called ligands
Estrogen, Adrenalin