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
prohormone def
large peptide molecules that can be processed into other hormones OR steroid hormones converted into bioactive steroids
LPM prohormone example
beta endorpin, beta lipotropin
steroid prohormone example
testosterone to estrogen
Growth factor definition
hormone like substances which promote growth of body or brain tissue
growth factor examples
NGF nerve EGF epidermal
cytokines def
hormone like factors that are produced and released by lymphocytes, macrophages, other cells. function to regulate immune activity
example of cytokine
interferon Y, interleukins
adipokines def
chemical messengers released from fat cells
adipokine def
leptin
vitamins def
chemicals which regulate metabolism, growth, dev in body. synth in body and has hormone properties
hormone physiological regulater problem with def
not all regulators are hormones ie. CO2, Glucose
problems with defs of hormone
draw table
difference between neurotransmitter and neuromodulator
- NMs can be released by neural or non neural cells 2. NT acts trans synaptically while NMs do not, 3. NTs normaly amines, NMs usually peptides
Draw nitric oxide as an NT
see image
Explain nitric oxide as a neurotransmitter
see image
name the neurotransmitters
6; see table
name the neurohormones
6; see table
name the neuropeptides
6; see table
name the hormones
8; see table
name the growth factors
5; see table