MORE PRACTICE Flashcards
What causes hypersecretion?
usually caused by a tumor or ignoring negative feedback
What causes hyposecretion?
gland destruction
What connects the hypothalamus to the pituitary?
Infundibulum
How is the pituitary gland divided?
Divided into the posterior and anterior
Anterior is made up of lots of what?
blood vessels
Posterior is made up of lots of what?
neurons
How do neurons move from the hypothalamus to the posterior pituitary?
by the hypothalmo-phoyspseal tract this allows secretion of the nerual hormones into the blood stream
Where are the hormones from the hypothalamus secreted
they are secreted onto capillaries in mediam eminence
What is the tract of the hormones?
hormones goes down into capillaries into galnd and have a tropic effects which makes AP secrete its own hormones into the blood
What is the most common cause of congenetial hypothyroidism
dietary iodine deficiency in the mother
Causes of hyperthroidism
tumors or autoimmune disease
What is the most common cause of hyperthyrodiism
graves disease
How does graves disease cause hyperthyroidism?
TSI antibodies stimulate the TSH receptor
What are the main adrenal catecolamines?
epinephrine and norepinephrine
Alpha 1 causes what
smooth muscle contraction
