Week Seven: Endocrine Flashcards
Chemical messengers produces by endocrine glands and secretes direct into…
Blood vessels
What is he primary function of the endocrine system
Produces hormones
What is a negative feedback system
When level of specific hormone drops below needed levels, appropriate endocrine gland is stimulated to produce more hormone
Secretion of some hormones is stimulated by _______ nerve impulses when an animal feels threatened
Sympathetic
Which hormones stimulates fight or flight response
Epinephrine
What does the hypothalamus do
Controls activities of pituitary gland
Portal system of blood vessels links ______ with anterior portion of pituitary gland
Hypothalamus
Modified neurons in hypothalamus secrete releasing and inhibiting factors into …
Portal blood vessels
Modified neurons in hypothalamus also secrete what
Anti diuretic hormone and oxytocin
How many pituitary glands do horses have
Three
What is adenohypophysis
Anterior pituitary
Stimulated by hypothalamus and direct feedback from target organs and tissues to produce it’s hormones
What is neurohypophysis
Posterior pituitary
Stores and releases hormones produced in hypothalamus
What is somatotropin and somatotropin hormone
Growth hormone
Promote body growth in young animals
Helps regulate metabolism or proteins, carbohydrates, and lipids in body’s cells
What does prolactin do
Trigger and maintain lactation
Secretion if milk by mammary glands
What is TSH and what does it do
Thyroid stimulating hormones
Stimulates growth and development of thyroid gland and causes it to produce it’s hormones
What is ACTH and what does it do
Adrenocorticotropic hormone
Stimulates growth and development of adrenal cortex and release of some of it’s hormones
What is FSH and what does it do In female
Follicle stimulating hormone
Stimulates growth and development of ovarian follicles
Produce and secrete estrogen
What does FSH do in males
Stimulates sperm
What is LH and what does it do
Luteinizing hormone
Causes ovulation
Completes process of follicle development in ovary
What is MSH and what does it do
Melanocyte stimulating hormone
Control of color changes in pigment cells
What does the posterior pituitary do
Stores anti diuretic hormone and oxytocin (keeps you from passing urine)
What is ADH and what does it do
Anti diuretic hormone
Prevents diuresis (allowing kidneys to pass water)
Generates nerve impulses (causes release of ADH)
What are the effects on the uterus from oxytocin
Causes contraction of myometrium at time of breeding and at parturition
What effect does oxytocin have on active mammary glands
Causes movement I milk down to the lower parts of the glad (milk letdown)
