Flashcards in chapter 17 Deck (143)
Which system communicates by electrical impulses and transmitters?
Which system communicates by hormones?
Which system releases hormones into the bloodstream and can go all over the body?
Which system releases neurotransmitters at target cells?
Which system reacts quickly within 1 to 10 ms?
The nervous system
Which system has local specific effects?
Which system has general widespread effects
Which system reacts more slowly could take seconds to days because of so many places to go?
Which system stops quickly when the stimulus stops?
Which system continues responding longer even after the stimulus stops it start slowly stop slowly?
what is a chemical messenger it stimulates the physiology of cells in another tissue or organ?
What makes a tissue or organ change what they're doing?
What are the three classes of hormones?
Which type of hormone is derived from the cholesterol molecule?
What hormone is hydrophobic which means it won't dissolve in water so it must bind to transport proteins in plasma?
Which hormones are large and are called proteins and have chains of 3-200+ amino acids?
Which hormone is hydrophilic which means it likes water so it can mix with blood plasma and travel in blood?
What means one amino acid?
This hormone is also hydrophilic and is made from amino acids tryptophan or tyrosine. Most are the same as peptide hormones.
A thyroid hormone is what type of hormone?
What is the mode of action of a hormone?
Alteration of cell activity.
Hormones only stimulate cells that have receptors for them.
What do receptors do?
They act like switches to turn certain metabolic pathways on or off when the hormone binds to them.
What is specificity?
It means being picky. The receptor for one hormone will not bind other hormones
What is saturation?
All of the receptor molecules are occupied by hormones
Which hormones diffuse through the plasma membrane and entered the nucleus?
Which hormones bind to receptors associated with DNA?
What hormone cannot penetrate into a target cell?
A hormone that binds to cell surface receptor which then activates the G protein and the G protein migrates to effector enzyme And activates it which generates the second messenger?
The second messenger then activates other enzymes which catalyze or inhibit metabolic reactions
Cyclic AMP, DAG, IP3 act as second messengers
What is amplification?
When one hormone can trigger the synthesis of many enzymes