Endrocrine Flashcards
Homeostasis
State of equilibrium
Negative feedback
Immediate change to equilibrium
Positive feedback
Worse before better equilibrium
Histology major tissues
Epithelial, connective, muscular, nervous
Epithelial tissue
- thin border
- protection absorption secretions
- no matrix
- a vascular
Cognitive tissue
- tissue repair
- well vascular
- large matrix
Membranes
Strong thin sheet, made of connective tissue base, epithelial layer
Muscle tissue
- Contracts and create tension
- skeletal, cardiac, smooth
- dont dived well
Nervous tissue
- conduct nerve impulse
Endocrine
- Secretes to the entire body via bloodstream
- has ducts
Exocrine
- Secretes to one spot
- no ducts
Hormone
- release by endocrine glands
- transported in blood stream to target tissues
Amino acid derivative (hormone structure)
A -> Ax
- quickest way to make hormones
- smaller, short lived
Peptide hormone (hormone structure)
- amino acid chain
- protein molecule
- moderate size and life
Lipid derivative (hormone structure)
- made of a lipid molecule
- last longer and large size
Half life
Time for half the molecule to disappear
Pituitary gland
- under hypothalamus
- master gland
- anterior and posterior
Antidiuretic hormone
Stimulates kidneys to conserve water
Oxytocin
Stimulates labor contractions
Growth hormone
Stimulates growth
Thyroid stimulating hormones
Stimulates thyroid to release its hormone
Adrenocorticotropic hormone
Stimulates adrenal cortex
Prolactin
Stimulates milk production
Thyroid gland
- metabolism
- T3+T4 hormones
- produces calcitonin (calcium levels in blood stream)
Parathyroid gland
- parathyroid hormone
- calcium in blood stream
Adrenal cortex
- outer layer
- produces corticosteroids, manages long range stress
- rest and digest
Adrenal medulla
- produces epinephrine and norepinephrine
- fight or flight
Pineal gland
- in brain
- Produces melatonin
- circadian rhythm
Pancreas hormones
- pancreatic islets
- Insulin, lowers blood sugar
- glucagon, raise blood sugar
Endorphins
- suppresses pain
