Endocrine+System

=Endocrine System=



**_How does the endocrine system help the body maintain homeostasis?**
===="This is the main way we maintain homeostasis actually, since the endocrine system releases chemicals known as hormones. These hormones are sent via the blood to specific spots in the body to control things like blood sugar, heart rate, etc."====

_What are the major organs of the endocrine system? " The major organs and functions of the endocrine system are various types of organs, the endocrine system includes these major organs: liver, pancreas, gallbladder, and brain."



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"They travel through the blood until they reach a cell with a receptor that they fit in, then a molecule attaches to the receptor and sends a signal inside the cell. The signal may tell the cell to produce a certain protein or to multiply."=====

_How is the hypothalamus part of both the nervous and endocrine systems? The hypothalamus glands release hormones in both nervous and endocrine systems.

_What might occur if a releasing hormone continues to be produced after the body reaches its ideal condition for homeostasis? The body will be unbalance and may cause illness.

_How do feedback loops regulate homeostasis? "Feedback loops maintain balance and homeostasis."

Vocabulary

29.2 _neuron: "A neuron is a nerve cell that is the basic building block of the nervous system"

_dendrite: "Extensions from the neuron cell body that take information to the cell body. A single nerve may possess many dendrites."

_axon: The single process of a nerve cell that under normal conditions conducts nervous impulses away from the cell body and its remaining processes

_neurotransmitter: "the chemicals which allow the transmission of signals from one neuron to the next across synapses." _synapse: "junction that permits a neuron to pass an electrical or chemical signal to another cell."

29.4 _cerebrum: "the non-technical term for the telencephalon, the largest part of the human brain -- also known as the cerebral hemispheres" _cerebellum: "is a region of the brain that plays an important role in motor control."

_reflex arc: "an automatic response to some kind of stimulus"

_somatic nervous system: "is the portion of the nervous system  responsible for voluntary body movement and for sensing external stimuli. All five senses are controlled by the  somatic nervous system"

_autonomic nervous system: "a regulatory branch of the central nervous system that helps people adapt to changes in their environment."

29.6 _glands: "is an organ in an animal's body that synthesizes a substance for release such as hormones or breast milk, often into the bloodstream "

_hypothalamus: "small cone-shaped structure within the brain that plays a central role in controlling our autonomous nervous system"

_releasing hormone: "a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland"

_pituitary gland: "tiny organ, the size of a pea, found at the base of the brain. As the master gland of the body, it produces and secretes many hormones that travel throughout the body, directing certain processes stimulating other glands to produce different types of hormones"