Endocine System Flashcards
Which control system is quick and localized?
Neural Controls
Which system is slow and widespread?
Hormonal Controls
How do circulating hormones travel?
Through the blood
Which type of signal only acts on the cells that release them?
Autocrine
Which type of signal only acts on neighboring cells, not distant targets?
Paracrine
What are biologically active lipids which act in an an autocrine or paracrine manner?
Eiscosanoids
What lipid influences inflammation, ion transport, sleep, and other activities?
Eicosanoids
What are steroids made out of?
Cholesterol
Amino acid based hormones generally bind at the cell’s surface, except…?
The thyroid hormone
Which type of hormone enters the cell and interacts directly with the DNA?
Steroids
If the signal for an organ to release is the level of a chemical in the blood, what type of signal is it?
Humoral
If the signal for an organ to release a hormone is transmitted by the nervous system, what type of signal is it?
Neural
If the signal for an organ to release a hormone is a releasing hormone, what type of signal is it?
Hormonal
What type of feedback limits Hormone production?
Negative feedback
What does the pituitary gland suspend from?
The Hypothalamus
What connects the pituitary and the hypothalamus?
The infundibulum
What transports hormones from the Hypothalamus to the pituitary?
The Infundibulum
What is another name for the pituitary gland?
Hypophysis
What is another name for the anterior portion of the pituitary gland?
Adenohypophysis
What is the posterior position of the neurohypophysis called?
Neurohypophysis
What two parts of the brain regulate the secretion of every hormone in the body?
- Hypothalamus
2. Pituitary
What part of the pituitary gland secretes GH?
The adenohypohysis
The development and activity of the thyroid gland is controlled by which hormone?
Thyrotropin (TSH)
What regulates the release of corticosteroids?
ACTH
Which two gonadotropins are produced during and after puberty?
LH and FSH
Which hormone stimulates milk production by the breasts?
PRL
What are the two hormones released by the Neurohypophysis?
- Oxytocin
2. Antidiuretic Hormone (ADH)
What does ADH promotes water retention by what?
The kidneys
The phrase “Thyroid Hormone” refers to what two things?
T3 and T4
What is another name for T4?
Thyroxine
Most cells in the body are target cells for which hormone?
The thyroid hormone
T3 and T4 increased what two things?
- Increased metabolic rate
2. Heat
What regulates calcium metabolism?
Calcitonin
Calcitonin stimulates ____ and inhibits _____.
Osteoblasts; Osteoclasts
Calcitonin promotes what?
Bone Density
Follicle cells in the thyroid gland produce what?
Thyroglobulin
Which hormone increases calcium in the blood?
PTH
What type of corticosteroid regulates the concentrations of ions in the blood?
Mineralocorticoids
What hormone is secreted in response to low blood volume caused by water loss?
Aldosterone
What is released by the adrenal cortex in response to stress?
Corticosteroids
Which corticosteroids provides energy for ‘fight or flight’ functions?
Glucocorticoids
What is the principal glucocorticoid in humans?
Cortisol
Which hormone is responsible for the appearance of secondary sex characteristics and sex drive?
Androgens
What are the two hormones produced by the pancreas?
- Glucagon
2. Insulin
Glucagon is released in response to what?
Low sugar levels
What is the acidification of the blood due to high ‘ketone body’ levels called?
Ketoacidosis
What are the two major products of the ovaries>
Estrogen and progesterone
What hormone produced by the heart reduces blood pressure, blood volume, and blood sodium concentration?
ANP