Homeostasis Assessment

Cellular homeostasis involves maintaining a balance of several factors that make a cell healthy. How does the cell membrane help the cell maintain homeostasis?

• It slows the processing of nutrients inside the cells.

• It allows the movement of nutrients, fluids and waste into and out of the cell.

• It blocks the production of ATP energy in the cells.

• It controls the production of proteins from amino acids.

Tags

NGSS.MS-LS1-2

A science class was learning about homeostasis and placed an egg cell without a shell (cell membrane was exposed) in a solution overnight. Over time the egg gains mass and swells. What is the most likely explanation for the cell’s gain in mass?

• The solution is hypertonic, meaning there were initially more salts outside of the cell than the internal environment of the cell.

• The solution is hypotonic, meaning there were initially more water molecules outside of the cell compared to the internal environment of the cell.

• The solution and the cell have equal concentrations of solutes, meaning it is isotonic.

• The solution and the cell have equal concentrations of water and solutes, so it was already balanced.

Tags

NGSS.HS-LS1-3

Why must a person receiving an intravenous solution (IV) not have a saturated amount of dissolved particles in the IV bag?

• Extra dissolved particles (like salts and sugar) will cause the red blood cells to shrink.

• Extra dissolved particles (like salts and sugar) will cause the red blood cells to swell.

• Extra dissolved particles (like salts and sugar) will cause the red blood cells to remain unchanged.

• Extra dissolved particles (like salts and sugar) will cause the red blood cells to burst.

What would happen to a brain cell if you consumed too much water and the water was unable to leave your body?

• It would swell due to high water concentration.

• It would remain unaffected due to the isotonic conditions.

• It would remain unaffected due to the low water concentration.

• It will lose water due to the low solute concentration.

Tags

NGSS.HS-LS1-3

The body works to maintain the normal range that supports life by responding to what conditions?

• Tissue and cell formation

• Production of key vitamins

• Internal and external changes

• Cell differentiation and determination

The circulatory system and the respiratory system work together to make sure cells are able to have an adequate supply of ATP, delivering the inputs and carrying away the cellular waste. Which of the following most reasonably explains how the cell membrane helps cells maintain homeostasis while the cells are producing energy?

• By being selectively permeable, it uses transport proteins to regulate the entry of oxygen and glucose and the exit of carbon dioxide and other wastes.

• By allowing all molecules to freely diffuse into and out of the cell so concentrations inside and outside are always identical.

• By preventing any exchange with the environment so internal conditions never change during ATP production.

• By only permitting water to cross, which ensures energy production does not alter solute concentrations.

Tags

NGSS.MS-LS1-2

Which 2 examples below show body systems working together to maintain homeostasis? (Choose 2)

• Oxygen collected by the nervous system is carried throughout the body by the circulatory system.

• Liquid wastes transported by the circulatory system are carried to the excretory system to be filtered and exit the body.

• Nutrients collected by the digestive system are carried throughout the body by the circulatory system.

• Urea collected by the circulatory system is carried throughout the body by the respiratory system.

Tags

NGSS.MS-LS1-3

A person who is cold shivers to generate body heat. Which of the following lists the primary body systems that interact to maintain homeostasis in this situation?

• Nervous (brain), excretory (sweat glands), and respiratory (lungs)

• Excretory (sweat glands), digestive (stomach), and respiratory (lungs)

• Digestive (stomach), muscular (muscles) and circulatory (blood vessels)

• Muscular (muscle), circulatory (blood vessels) and nervous (brain)

Tag each situation with the correctly labeled solution.

a

b

c

Hypertonic

Hypotonic

Isotonic

Tags

HS-LS1-3

The cell in the middle is in a/an (a)   solution.

• isotonic
• hypertonic
• hypotonic

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5