Homeostasis Flashcards
Cues from the …… help keep the body on a 24H cycle.
Environment
What is osmolality?
The number of osmoles per kg
What is an osmole?
The amount of substance that dissociates in solution to form one mole of osmotically active particles
If a hormone exhibits paracrine action, what does this mean?
It means the hormone acts on an adjacent cell via the interstitial fluid
What are the four classifications of hormones?
Peptide, amino acid derivatives, glycoprotein and steroids
Hormone levels are determined by three rates. What are they?
Rate of production, rate of delivery and rate of degradation
Lipid soluble hormones bind to …….. receptors
Intracellular receptors
What is the name of the pituitary stalk?
Infidibulum
The pituitary gland sits in a socket of bone called the …… ……..
Sella turcica
What am I describing? “It forms a complex functional unit that serves as the major link between endocrine and nervous system”
The hypothalmic-pituitary axis
Oxytocin and ADH are both secreted the posterior pituitary gland but where are they produced?
The hypothalamus
Tropic hormones are made in the hypothalamus and then act on the anterior pituitary. Where are these hormones released from?
The hypophyseal portal system
What is somatostatin also known as?
Growth hormone inhibiting hormone
Where is the biological clock of the brain?
In a small group of neurone in the suprachiasmatic nucleus
Give an example of a hormone produced in the anterior pituitary. (6)
TSH, adrenocorticotrophic hormone, LH, FSH, prolactin and GH
