Homeostasis and Cellular Transport

Homeostasis and Cellular Transport

Recognize and explore how cells of all organisms undergo similar processes to maintain homeostasis, including extracting energy from food, getting rid of waste, and reproducing. (SC.6.L.14.3 - DOK 2)

Homeostasis and Cellular Transport

• Homeostasis describes the stable internal environment that all organisms (and cells!) must maintain, regardless of what is occurring outside of them, in order to survive.

• In order to maintain homeostasis, cells must take in materials, like nutrients and gasses, and release others, like waste.

• The cell membrane is responsible for controlling what moves in and out of a cell and is selectively permeable, which means some things can move in and out, but not all.

• There are two types of cellular transport: active and passive. Passive transport does not require energy, while active does.

• Passive transport can happen by diffusion, osmosis, or facilitated diffusion.

• Active transport can happen through protein pumps, endocytosis, or exocytosis.

Multiple Choice

Homeostasis is the ability of living things to maintain internal balance. Which of the following is an example of homeostasis?

• A boy's nervous system causes him to pull his hand away from a hot pot.

• A dog's reproductive system enables the dog to produce offspring.

• A plant cell takes in more water when it becomes too dry.

• A virus infects a human cell and causes yellow fever.

Multiple Choice

The diagram identifies four structures in a plant cell. Which structure controls what enters and leaves the cell?

• cell membrane

• cell wall

• chloroplast

• nucleus

Multiple Choice

Process in which substances or particles move through the cell membrane, protein channel, or protein doorway from high concentration to low concentration without the use of energy 

• Diffusion

• Active Transport

• Osmosis

• Passive Transport

Multiple Choice

Process in which particles move from less crowded (low concentration) to more crowded (high concentration) using energy

• Passive Transport

• Cellular Respiration

• Active Transport

• Osmosis

Multiple Choice

• Passive Transport

• Osmosis 

• Active Transport

• Diffusion

Multiple Choice

Water moving from areas of high concentration to low concentration.

• Photosynthesis

• Osmosis

• Cellular Respiration

Multiple Choice

Small particles such as oxygen and carbon dioxide move easily across the cell membrane from areas of high concentration to low concentration. 

• Active Transport

• Osmosis

• Diffusion

Multiple Choice

• Diffusion

• Cellular Respiration

• Osmosis

• Active Transport

Multiple Choice

• Endocytosis

• Active Transport

• Mitochondria

• Exocytosis

Multiple Choice

• Endocytosis

• Exocytosis

• Diffusion

• Osmosis

Multiple Choice

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