The Endocrine System Flashcards
The main chemical messengers are _____ and _____
neurotransmitters
hormones
Hormones can be _____ soluble or ____ soluble
lipid
water
Lipid soluble hormones attach to _____ ____ for transport through the blood.
plasma proteins
_____ soluble hormones circulate freely in blood.
water
_____ soluble hormones have a longer half life - why?
water
attached to plasma proteins - prevents diffusion/excretion from the blood
The 3 main mechanisms of hormonal secretion regulation are _____ stimuli, ______ stimuli and _____ stimuli
humoral
neural
hormonal
If blood calcium is low, parathyroid hormone (secreted by parathyroid glands) causes osteoclasts to release calcium into blood. Which mechanism of regulation of secretion is this?
Humoral stimuli
_____ stimuli is stimulated by the nervous system and _____ stimuli is regulation by other hormones
neural
hormonal
Actions of hormones happen when they bind to _____ ____ on specific protein receptors
receptor sites
_____ _____ hormones pass through the cell membrane , link with a receptor in the nucleus/cytoplasm, link with DNA and bring about a cellular response.
lipid soluble
_____ ______ hormones link with a membrane receptor which causes reactions with membrane proteins to produce cAMP, which causes the cellular responses
water soluble
_____ hormones are hormones which target other endocrine glands and stimulate their growth and secretion
trophic
The pituitary gland is separated into the ____ and ____ pituitary.
anterior
posterior
Hormones are released in the hypothalamus and travel through the blood which stimulates production of hormones in the ______ pituitary
anterior
The _____ pituitary is part of the nervous system and releases hormones into the blood stream due to the linked nerves from the hypothalamus.
posterior
The anterior pituitary secretes … (6)
growth hormone (GH) thyroid stimulating hormone (TSH) adrenocorticotropin hormone (ACTH) luteinising hormone (LH) follicle stimulating hormone (FSH) prolactin
The posterior pituitary secretes …
oxytocin
antidiuretic hormone
The thyroid gland releases thyroid hormones (thyroxin and triiodothyronine) and ______
calcitonin
The parathyroid glands release ______ which manages the ____ within blood
parathyroid
calcium
The adrenal gland is made up of the adrenal ____ and the adrenal _____
cortex
medulla
Aldosteron, cortisol and arenal androgens are produced in the adrenal ____
cortex
Adrenaline and noradrenaline are produced in the adrenal _____
medulla
Pancreatic _____ release _____ and _____ into capillaries
islets
insulin
glucagon
The pineal gland is located between ______ of the brain and secretes ____
melatonin
The thymus gland secretes _____ which plays a role in _____
thymosin
immunity
_____ has the function of stimulating and sustaining milk production after birth
prolactin
_____ _____ _____ regulates the production and secretion of thyroid.
thyroid stimulating hormone
_______ hormone controls secretion of certain hormones from the adrenal cortex
adrenocorticotrophic
____ _____ hormone targets the reproductive organs and helps woth the development of egg and sperm
follicle stimulating
_____ hormone promotes secretion of sex hormones
luteinising
_____ hormone causes kidneys to conserve water
antidiuretic
______ contracts smooth muscle in uterine wall
oxytocin
____ and _____ (produced by the ____) control blood glucose levels
insulin
glucagon
pancreas
____ hormones (thyroxine and triidothyronine) target most tissues to increase rate of reactions
thyroid
____ (produced in the thyroid gland) decreases calcium and phosphate concentration within the blood
calcitonin
_____ hormone increases calcium and phosphate concentration within the blood
parathyroid
_____ and _____ target all tissues and control the fight or flight response
adrenaline
noradrenaline
____ regulates concentration of extracellular electrolytes by conserving sodium ions and excreting potassium
aldosterone
_____ decreases protein synthesis, increases fatty acid release and is produced in the adrenal cortex
cortisol
____ _____ supplement sex hormones and are produced in the adrenal cortex
adrenal androgens