1.4, 1.5 Flashcards
exocrine
communication from inside of cell to outside of body ie. pheromones
Phytohormones
plant hormones. May mimic hormones in human body and can influence NE system
Phytohormone example
auxins - change plant direction facing sun
Phytoestrogens example
soy
Definition of true hormones
- chem messengers 2. synth in ductless endo glands 3. secreted into blood stream 4. act on specific target receptors 5. specific actions in target cells
neurohormones
released by neurosecretory cells via posterior pituitary into circulation or via portal system into a. pit
examples of neurohormones released by p. pit, into where
oxytocin and vasopressin; directly to circulation
examples of neurohormones released by p. pit, via X, into a. pit
portal system into a. pit; hypothalmic releasing hormones
neurotransmitters def
released by presynaptic nerve cells into a synapse; stimulate receptors on postsynaptic nerve cells
examples of NTs
Ach; Dopamine, Adrenaline, serotonin
Pheromones definition
volatile chemical messengers, synthesized in exo/duct glands, secreted into environment
what to pheromones do
act on other individuals, usually of same spp through smell or taste; alter behaviour
effects of pheromones are called
releaser effeects (alteration of behaviour) and effcts on neuroendocrine system (primer effects
parahormones def
hormone like substances not necessarily produced in endocrine glands but have many of same characteristics of hormone
parahormone examples
histamine, prostoglandins, vit. D