Homeostasis and Cellular Organization

Homeostasis

• allows for a wildly fluctuating internal environment
• is impossible in vertebrates
• is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
• is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation

Tags

NGSS.HS-LS1-3

Homeostasis in the human body is often maintained by a: 

• neutral feedback loop 
• solar feedback loop
• positive feedback loop
• negative feedback loop

Tags

NGSS.HS-LS1-3

Positive feedback is when the change caused by the stimulus is

• decreased
• non existant
• increased
• changes constantly

When you get cut, your skin cells release hormones that signal platelets to come and stop the bleeding. Platelets then release more hormones that signal even more platelets to help stop bleeding. The hormone signals continue until the cut is closed.

• Positive Feedback Response
• Negative Feedback Loop 

Tags

NGSS.HS-LS1-3

When you are cold, you shiver and your blood vessels contract, which warms you up. When you are hot, you sweat and your blood vessels expand, which cools you down.  

• Positive Feedback Response
• Negative Feedback Loop 

Tags

NGSS.HS-LS1-3

Water diffusing with the concentration gradient from high water concentration to low water concentration across a cell membrane is....

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

Which diagram represents an organ?

• #1
• #2
• #3
• #4

Tags

NGSS.MS-LS1-3

Which is the largest structure?

• Cells
• Tissue
• Organ
• Organism

Tags

NGSS.HS-LS1-2

Which of the following are in the correct order?

• organ system, cell, organ, tissue, organism

• cell, organ, tissue, organ system, organism

• cell, tissue, organelle, organ system, organism

• cell, tissue, organ, organ system, organism

Tags

NGSS.HS-LS1-2

Which type of feedback system is more common in maintaining homeostasis?

• positive

• negative

• neutral

• balanced

Tags

NGSS.HS-LS1-3