Human Body Systems Interactions

What happens to blood vessels near the skin surface when the body is too hot?

When blood glucose levels are too high, what is secreted by the pancreas?

What happens when blood glucose levels decrease?

What is the result of the sequence of stimulus-receptor-signal-response in the body?

What is the function of glucagon in the regulation of blood glucose levels?

What happens to the response when the body temperature returns to normal?

What is the primary function of the nervous and endocrine systems in the human body?

What is the term for the process of maintaining a stable internal environment in the human body?

What is the primary mechanism by which the human body maintains homeostasis?

What stimulates the brain to respond to changes in body temperature?

What is the role of the organ systems in maintaining homeostasis?

What happens when the body's internal environment varies from a set value?

When the body temperature is too high, the skin produces sweat and blood vessels near the skin surface dilate to decrease body temperature.
This response is an example of negative feedback, which helps to maintain homeostasis.

When blood glucose levels are too high, the pancreas secretes insulin to stimulate glucose absorption and conversion into glycogen, which is stored in the liver.
As blood glucose levels decrease, less insulin is produced.
When glucose levels are too low, glucagon is produced, causing the liver to convert glycogen back to glucose.

The sequence of stimulus-receptor-signal-response is used to maintain homeostasis throughout the body.
Negative feedback causes a response to end when the body temperature returns to normal.

Homeostasis is the process of maintaining a stable internal environment.
The organ systems work together to supply body cells with necessary substances and eliminate waste.
They also maintain temperature, pH, and other conditions at optimal levels to support life processes.

Negative feedback is a response to a stimulus that keeps a variable close to a set value.
It "shuts off" or "turns on" a system when it varies from a set value.
The body's internal thermostat is an example of negative feedback, regulating body temperature through sensory receptors in the skin and brain.