24-25 Homeostasis Through Transport

I am the thin, flexible boundary between the cell and the outside environment. I allow materials to move in and out of the cell. What am I?

• The cell membrane

• The nucleus

• The ribosome

• The mitochondria

Tags

NGSS.MS-LS1-2

What type of biomolecule is the primary component of the cell membrane?

• Lipids

• Protein

• Nucleic Acids

• Carbohydrates

Which biomolecule spans the width of the cell membrane. aids in the transport of large molecules, and allows the cell to interact with its extracellular space?

• Proteins

• Lipids

• Carbohydrates

• Nucleic Acids

What role do carbohydrates play in the cell membrane?

• Help identify the cell and act as a binding site.

• Move specific molecules in and out of the cell.

• Act as a protective barrier, preventing harmful objects from entering the cell.

• Use energy to transport molecules out of the cell.

What is homeostasis?

• Regulation of an organism’s internal environment in order to maintain conditions suitable for survival

• The process in which the internal temperature is kept constant.

• Transporting nutrients into the cell from the external environment

• The process of transporting waste out of the cell

Tags

NGSS.HS-LS1-3

The plasma membrane's main role in the cell is -

• Create a boundary that allows the transport of materials in and out of the cell to maintain homeostasis

• Cell reproduction

• Movement of the cell to a more favorable environment

• Producing energy for the cell

Tags

NGSS.HS-LS1-3

How does a cell maintain homeostasis?

• By regulating what enters and leaves through the membrane.

• By using proteins to signal when a cell needs to die

• By producing enough energy to ensure proper cell function

• By relocating to a more favorable living environment

Tags

NGSS.HS-LS1-3

The cell membrane is semipermeable. What does "semipermeable" mean?

• The membrane allows certain substances to pass through it but not others

• The membrane is semi-transparent

• The membrane used in a short-cycle signaling mechanism

• The membrane only allows large objects to pass through, not smaller objects.

Which of the following best describes the movement of molecules in the maintenance of homeostasis through passive transport?

• Molecules will move from an area of low concentration to an area of high concentration until an unstable state is met.

• Molecules will stay stationary (not move) until the cell is ready to begin the process of transportation.

• Molecules will move from an area of high concentration to an area of low concentration until a state of equilibrium is met.

• All molecules will exit the cell to prevent the cell from bursting.

Tags

NGSS.HS-LS1-3

Which answer choice best describes the movement of water in this picture?

• All water molecules will stay where they are to maintain homeostasis

• Trick question! Water doesn't move across the membrane to maintain homeostasis.

• Water will move into the cell to maintain homeostasis

• Water will move out of the cell to maintain homeostasis.

Tags

NGSS.HS-LS1-3