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Endocrine System
Bracken 10th grade Human A&P
| The ____________ system is a major controlling system in the body. | endocrine |
| The endocrine system's means of control, however, is much _______ | slower and prolonged |
| The _________ system is the other major body system that acts to maintain homeostasis. | Nervous |
| The endocrine system uses chemical messengers, called _____ | hormones |
| The nervous system uses messengers called | nerve impulses |
| Hormones enter the blood and are carried throughout the body for the activity of the | cardiovascular system |
| All cells do not respond to endocrine system stimulation. Only those that have the proper ______ on their cell membranes are activated by the chemical messengers | receptors |
| Response cells are called the _____ of the various endocrine glands. | target cells |
| Hormones promote homeostasis by _______ of body cells rather than by ______ | altering activity rather stimulating new or unusual activities |
| Most hormones are _____ molecules | steroid or amino |
| Various endocrine glands are prodded to release their hormones by nerve fibers (a _____ stimulus). | neutral |
| Endocrine glands can be prodded to release their hormones by other hormones. (a _____) | hormonal |
| Endocrine glands can be prodded to relate their hormones by the presence of increased or decreased levels of other substances in the blood (a _________ stimulus) | humoral |
| The secretion of most hormones is regulated by a ________ system in which increasing levels of that particular hormone "turn off" its stimulus. | negative feedback |
| The anterior pituitary gland is controlled by the | releasing hormones |
| The _____ is called the master endocrine gland because it regulates so many other endocrine glands | anterior pituitary |
| releasing hormones are secreted by the | hypothalamus |
| describe 3 things about steroid hormones | 1. binds to a receptor in the cell's nucleus 2. is lipid soluble 3. activates a gene transcribe messenger RNA |
| describe 2 things about acid-based hormones | 1. binds to a plasma membrane 2. acts through a second messenger such as cyclic AMP |
| hypothalamus releases hormones in portal circulation to the | anterior pituitary |
| growth hormone (GH) | releases to bones and muscles |
| Prolactin (PRL) | releases to the mammary glands |
| FJH and LH | release to the testes or ovaries |
| TJH | releases to the thyroid |
| ACTH | releases to the adrenal cortex |
| Small glands on that ride "horseback" on the thyroid | parathyroid glands |
| endocrine-producing organ present only in pregnant women | placenta |
Created by:
allisonlyles