HBS Unit 1 Concept 2 Homeostasis and Regulation Quiz

What is homeostasis?

• The stability of the internal environment

• The process of fruit ripening

• The regulation of blood sugar

• The response to stimuli

Tags

NGSS.HS-LS1-3

Which type of feedback mechanism intensifies the response?

• Positive feedback

• Negative feedback

• Autocrine feedback

• Paracrine feedback

What is an example of a positive feedback loop?

• Fruit ripening

• Human body temperature regulation

• Water concentration regulation

• Blood sugar regulation

Tags

NGSS.HS-LS1-3

What is an example of a negative feedback loop?

• Fruit ripening

• Human body temperature regulation

• Water concentration regulation

• Blood sugar regulation

Tags

NGSS.HS-LS1-3

What is the role of enzymes in homeostatic regulation?

• To speed up reactions without being permanently altered

• To regulate the behavior of overall processes

• To control the amount of an enzyme in cells

• To slow down reaction rates

Tags

NGSS.HS-LS1-3

What is feedback inhibition?

• the end product of a metabolic pathway shuts down the pathway

• The binding of chemical inhibitors to enzymes

• The regulation of enzyme activity by environmental conditions

• The synthesis of enzymes being turned off or on

Tags

NGSS.HS-LS1-3

How do cells maintain homeostasis with highly regulated signaling and transport mechanisms?

• By controlling what goes in and out of the cell through the cell membrane

• By using molecular pumps to move molecules against the gradient

• By using vesicles for endocytosis and exocytosis

• By altering gene expression

Tags

NGSS.HS-LS1-3

What is the process of osmosis?

• The spreading out of molecules across the membrane until equilibrium is reached

• The diffusion of water across the cell membrane

• The active transport of molecules through protein channels

• The movement of molecules from regions of greater concentration to regions of lesser concentration

Tags

NGSS.MS-LS2-1

What happens to a cell in a hypertonic solution?

• It shrivels

• It swells

• It stays the same

• It undergoes active transport

Tags

NGSS.MS-LS1-2

What is the purpose of molecular pumps in active transport?

• To move molecules down the concentration gradient

• To use vesicles for endocytosis

• To pump molecules against the gradient through protein channels

• To export materials out of the cell