Chapter 16 Flashcards
(44 cards)
Amino acid based hormones use
secondary messenger systems
Steroid based hormones use what mechanism
bind to DNA to influence RNA transcription
Steroid Hormones are synthesized from what
cholesterole
What ways can hormones cause changes
plasma membrane permeability, protein synthesis, enzymes, stimulate mitosis
What is humoral stimuli
control hormone release in response to change in extracellular fluid
What glands use neural stimuli
adrenal medulla and posterior pituitary glands
What does activation by hormone depend on
blood level of hormone, relative number of receptors, affinity for binding
What is permissiveness
one hormone cannot exert its effects without another hormone being present
What is synergism
more than one hormone produces the same effect on target cell resulting in amplification
What is antagonism
one or more hormones opposes action of another hormone
What part of the pituitary uses the hypophyseal portal system
anterior pituitary gland
What is diabetes insipidus caused by and its symptoms
low ADH thirst and urine production increase
What are the 6 hormones released from the anterior pituitary
Growth hormone, Prolactin, ACTH, TSH, LH, FSH
What effect does growth hormone have on the liver
reduces liver fat and inflammation
What are the different growth hormone disorders
gigantism, acromegaly, pituitary dwarfism
How is TSH inhibited
GHIH
What does ACTH cause the release of
cortisol from adrenal cortex
What is the function of FSH
production of gametes
What is the function of LH
release of hormones
What triggers the release of FSH and LH
GnRH
What inhibits prolactin
dopamine
What are thyroid follicles
structural and functional units of the thyroid
What cells produce calcitonin
parafollicular cells
What is a calorigenic effect
increase body temp, heart rate, production of ATP
