Homeostasis and Feedback Loops

The tendency of an organism to maintain a balanced state in order to stay healthy.

• Stimuli
• Response
• Tropism
• Homestasis

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NGSS.HS-LS1-3

What is the endocrine system?

• senses the hormone levels in the blood
• controls all other endocrine glands
• A group of glands that work together with the nervous system to coordinate all body functions
• decreases bone calcium levels

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NGSS.HS-LS1-3

NGSS.HS-LS1-2

What are released by the endocrine system?

• blood

• glucose

• hormones

• water

A hormone is

• a chemical substance produced by a gland and carried by the lymph.

• an enzyme produced by a gland and carried by the blood.

• a chemical substance produced by an organ and carried by the blood.

• a chemical substance produced by a gland and carried by the blood.

What is the point of a feedback loop?

• To provide the body with more energy

• To provide the body with more food

• To make sure the conditions in the body are always changing

• To make sure the conditions in the body remain stable

Tags

NGSS.HS-LS1-3

increases or speeds up original change

• negative feedback

• positive feedback

• endotherm

• ectotherm

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NGSS.HS-LS1-3

Negative Feedback Loops:

• amplify processes
• prevent small changes from getting larger
• are initiated during childbirth
• are found only in plants

Tags

NGSS.HS-LS1-3

Humans have ___ for body temperature, blood glucose concentrations, electrolyte concentrations, pH levels, tendon tension and variables.

• positive feedback mechanisms
• set points
• a wide internal range
• no regulation

Tags

NGSS.HS-LS1-3

The "cause" for something to happen is the

• response
• effect
• stimulus
• homeostasis

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NGSS.MS-LS1-8

Detects change and sends a message to the control center

• receptor

• control center

• effector

• regulation

Tags

NGSS.HS-LS1-3