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Cellular Transport:  We know as cellular transport the constant movement of substances in both directions through the membrane; it is the mechanism by which needed materials enter the cell while waste materials and cellular secretions leave.

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• Homeostasis:
Set of organisms that consist of their ability to maintain a stable internal condition by compensating for changes in their environment through the regulated exchange of matter and energy with the outside.

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•Control system:
The control system is a system characterized by the presence of a series of elements that allow influencing the operation of the system.
In other words, a set of organs and structures made up of specialized cells.  and made up of neurons, but with a series of ramifications and having the brain in charge of the entire central nervous system in order to receive information from stimuli by the receptors.

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• +Positive feedback:
Positive feedback occurs when changes are promoted in a system, in response to actions that caused some alteration in the body.
 Example:Blood clotting to prevent bleeding.

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• -Negative feedback:
Negative feedback seeks to maintain the original balance or state of the system, responding with the aim of reducing the effects of actions that cause changes in the body.
 Example:Regulation of body temperature.

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•How are the circulatory system and the endocrine system linked to the homeostatic process?
The endocrine system, the circulatory system, produce hormones that regulate the processes that maintain homeostasis in the body, and the system coordinates with the nervous system to control the functions of other body systems.