Endocrine System Flashcards
What two systems work together to maintain homeostasis?
nervous and endocrine systems
How does the nervous system regulate physiological activities?
neurotransmitters (short-term, specific responses to stimuli)
How does the endocrine system regulate physiological activities?
Hormones (long-term regulation of metabolic processes)
Five ‘pure’ endocrine glands
- Pituitary
- Pineal
- Thyroid
- Parathyroid
- Adrenal
Four organs containing endocrine cells:
- Pancreas
- Thymus
- Gonads
- Hypothalamus
Endocrine cells release hormones directly into _______ , _______ , or _______ .
- Interstitial fluids
- Lymphoid systems
- Blood
Where is the pituitary gland located?
sella turcica
Which gland is controlled by the hypothalamus?
Pituitary gland
The two lobes of the pituitary gland
- Adenohypophysis (anterior lobe)
- Neurohypophysis (posterior lobe)
Hormones stored and released by the neurohypophysis
- Oxytocin
- Antidiuretic Hormone (ADH)
What condition results from an inability to produce ADH?
Diabetes insipidus
Functions of oxytocin
- Cause uterine contractions
- Milk letdown in lactation
Hormones released by Adenohypophysis (anterior lobe)
- Adrenocorticotropic hormone (ACTH)
- Thyroid-stimulating hormone (TSH)
- Growth hormone (GH)
- Prolactin (PRL)
- Follicle-stimulating hormone (FSH)
- Luteinizing hormone (LH)
Three hormones released by the adenohypophysis that target other glands (Tropic)
- Thyroid-stimulating hormone (TSH)
- Adrenocorticotropic hormone (ACTH)
- Gonadotropic hormone
Three hormones released by the adenohypophysis that do not affect other glands (Non-tropic)
- Melanocyte-stimulating hormone (MSH)
- Growth hormone (GH)
- Prolactin (PRL)
Hormone that has both tropic and non-tropic effects
Growth hormone (GH)
A disorder that results from a lack of growth hormone during childhood
Pituitary dwarfism
A disorder results from excess growth hormone during childhood
Gigantism
A disorder results from excess growth hormone in adulthood
Acromegaly
Two main thyroid hormones involved in metabolism
- Thyroxine (T4)
- Triiodothyronine (T3)