Endo appetite Flashcards
What is homeostasis ?
Mechanisms that act to counteract changes in the internal environment .
Variables are regulated to remain stable
It is a dynamic equilibrium
What are the homeostasis system components ?
- Stimulus
- Receptor
- Communication by AFFERENT PATHWAY between Nervous and Endocrine systems
- Control centre (set point)
- EFFERENT PATHWAY 9nervous and endocrine )
- Effector : Negative Feedback
Which hormone is setting the biological clock and where does it come from ?
Melatonin
From Pineal gland
At which time of the day is the cortisol level the highest ?
8
Wake up
Which external factors influence the Biological Clock ?
Light Temp Exercise Eating Interaction
Where in the brain is the biological clock ?
Suprachiasmatic nucleus
What is the name of the receptors in the hypothalamus that monitor blood pressure ?
osmoreceptors
what are hormones ?
Chemical signals produced in endocrine glands or tissues that travel in blood to cause effect on other tissue
Give an eg of a molecula that acts as Neurotransmitter and Hormone
Dopamine aka prolactin inhibitor hormone
What are the 4 groups of hormones ?
Peptide
Amino acid derivatives
Glycoproteins
Steroids
Give and eg of peptide hormones and is it water or lipid soluble ?
Insulin/Glucagon
Growth hormone
Water soluble
Give an eg of Amino acid derivative or ones and is it water or lipid soluble
Adrenaline/Noradrenaline (tyrosine) Thyroid hormones(tyrosine) Melatonin(tryptophan)
Adrenal medulla : water soluble
Thyroid hormones :lipid soluble
Give an eg of glycoprotein hormone
TSH
LSH
LH
Give and eg of steroid hormone and what is their precursor ?
Aldosterone
Testosterone
Cortisol
>from Cholesterol
True or false ,only free form of hormone is active ?
True
