What is facilitated diffusion?

Movement of molecules through integral proteins using the concentration gradient

Movement of molecules against the concentration gradient

Movement of molecules using energy

Movement of molecules through the plasma membrane without any proteins

Diffusion of water through a semipermeable membrane

Diffusion of solutes through a semipermeable membrane

Active transport of water through a semipermeable membrane

Active transport of solutes through a semipermeable membrane

When does osmosis occur?

When there is an imbalance of solutes inside a cell versus outside

When there is an equal concentration of solutes inside and outside a cell

When there is an imbalance of water inside a cell versus outside

When there is an equal concentration of water inside and outside a cell

What is the effect of a hypertonic solution on red blood cells?

Red blood cells shrink and become crenated.

Red blood cells swell and burst.

Red blood cells remain the same size.

What happens to red blood cells in a hypotonic solution?

They shrink and become crenated.

Active transport often works in which direction relative to the concentration gradient?

Against the concentration gradient

With the concentration gradient

Along the concentration gradient

Perpendicular to the concentration gradient

How does the glycocalyx help the immune system?

It allows the immune system to recognize "self" vs. "nonself"

What is the structure of a tight junction?

Integral proteins on adjacent cells fuse

Integral proteins on adjacent cells separate

Peripheral proteins on adjacent cells fuse

Peripheral proteins on adjacent cells separate

What are the structural components of a desmosome?

Plaques with linker proteins and supported by intermediate filaments

Tight junctions and supported by actin filaments

Gap junctions and supported by microtubules

Adherens junctions and supported by collagen fibers

Identify the structure labeled as "Plaque" in the diagram of a desmosome.

A structure that connects adjacent plasma membranes

A structure that supports intermediate filaments

A structure that contains transmembrane glycoproteins

A structure that forms the intercellular space

What is the primary structure of gap junctions?

They form tunnels that allow small molecules to pass from cell to cell.

They form tight seals between cells.

They anchor cells to the extracellular matrix.

They provide structural support to the cell membrane.

What is the function of gap junctions?

To allow small molecules to pass from cell to cell

To provide structural support to the cell

To anchor cells to the extracellular matrix

To form tight seals between cells

Where are gap junctions located?

Between adjacent plasma membranes

The function of the plasma membrane is....

to regulate what enters and leaves the cell.

fight bacteria and viruses that enter the cell.

provide rigid support and protection to the cell.

Which of the following describes the orientation of the plasma membrane?

Hydrophilic heads face the exterior and interior of the cell, while hydrophobic tails make up the interior of the membrane

Hydrophobic heads face the exterior and interior of the cell, while hydrophilic tails make up the interior of the membrane

Hydrophobic heads face the exterior of the cell and hydrophilic tails face the interior of the cell

Hydrophilic heads face the exterior of the cell and hydrophobic tails face the interior of the cell

Cells and the Plasma Membrane

Authored by Christine Boudreau

Biology

University

HS-LS1-1 covered

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56 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the smallest living functional units in biology?

Tissues

Organs

Cells

Molecules

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many different types of cells are there?

Over 100

Over 200

Over 250

Over 300

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is one of the characteristics of the different types of cells?

They are all identical in structure and function

They are specialized in structure and function

They are not specialized in structure and function

They do not have any specific structure or function

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

From where do cells arise?

From non-living matter

From existing cells

From chemical reactions

From spontaneous generation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the plasma membrane separate?

Intracellular fluid (ICF) from extracellular fluid (ECF)

Cytoplasm from nucleus

Mitochondria from cytoplasm

Ribosomes from endoplasmic reticulum

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a component of the plasma membrane?

Membrane lipids

Membrane proteins

Surface sugars

Nucleic acids

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What forms the glycocalyx on the plasma membrane?

Membrane lipids

Membrane proteins

Surface sugars

Cholesterol

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Cells and the Plasma Membrane

What are the smallest living functional units in biology?

How many different types of cells are there?

What is one of the characteristics of the different types of cells?

From where do cells arise?

What does the plasma membrane separate?

Which of the following is NOT a component of the plasma membrane?

What forms the glycocalyx on the plasma membrane?

Which of the following is a type of protein found in the plasma membrane?

What percentage of the lipid bilayer is made up of phospholipids?

Which part of the phospholipid is hydrophilic?

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