Homeostasis and Feedback

What is homeostasis?

• A state of balance in the body

• A lizard that can regulate its body temperature

• A lizard that can't regulate its body temperature

• A state of imbalance in the body

The two types of feedback systems that help organisms maintain homeostasis are:

• positive and negative 
• receptor and effector
• static and dynamic
• minor and major

How do negative feedback mechanisms help maintain stability in the body?

• By detecting deviations from a set point and activating responses to counteract these changes.

• By shutting down all bodily functions

• By causing extreme fluctuations in body temperature

• By promoting rapid cell division

Failure to maintain homeostasis could result in:

• lack of internal balance
• eventual death
• difficulty carrying on metabolism 
• all three

Tags

NGSS.HS-LS1-3

What is a hormone?

• a group of muscle tissues which contract together to produce a force

• consists of the organs and fluids that transport materials like oxygen and nutrients throughout the body. Heart and blood vessels

• a chemical that is made by special cells, that is released into the bloodstream to send a message to another part of the body

• Organs specialized for breathing that allow the diffusion of gases.

Tags

NGSS.MS-LS1-5

Any cell that has a unique or special receptor for a hormone or other chemical signal (the receptor is like a lock and the hormone is like a key) is called a

• Gene

• Target cell

• Enzyme

• Hormone

In a positive feedback loop, what is the relationship between input and output?

• Input decreases output.

• Input maintains output.

• Input has no effect on output.

• Input increases output.

This system consists of the organs and fluids that transport materials like oxygen and nutrients throughout the body. Heart and blood vessels

• circulatory system

• nervous system

• integumentary system

• respiratory system

This system of organs is specialized for breathing that allow the diffusion of gases.

• musculatory system

• circulatory system

• nervous system

• respiratory system

The "effect" of a given stimulus is the...

• response
• stimulus
• cause
• result