Movement through the Cell Membrane

In addition to providing protection, shape, and strength to the cell, the membrane helps regulate the flow of materials in and out of the cell
QUESTION OF
calculate
Questions #: 16
Time: 20 minutes
Pass Score: 80.0%
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Mode

The membrane helps ______ the flow of materials in and out of the cell

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Explanation

The condition of constant internal environment is referred to as chemical homeostasis

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Explanation

Movement of molecules in and out of the cell

When the movement of molecules occurs on its own, without any organized energy input from the cell, the movement is termed (1) transparent . When the cell expends energy to move molecules from one location to another, the process is known as (2) transparent

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active transport
passive transport
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Explanation

Diffusion is a type of passive transport where the movement of molecules occur in its own in and out of a cell

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Explanation

Movement of particles in diffusion, cell passive transport

In a system where diffusion occurs, a net movement of particles can be observed over time from regions of (1) transparent concentration of that substance to regions of (2) transparent concentration of that substance.

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lower
higher
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Explanation

From highest concentration to lowest concentration

The particles moving from the area of greater concentration will produce a concentration gradient ranging from the point of highest concentration to the point farthest away, where the lowest concentration occurs

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Explanation

Diffusion Illustrated

Arrange diffusion steps

(1) transparent   
→  
(2) transparent   
→  
(3) transparent  
 
 
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Explanation

A partially or differentially permeable membrane is called a ____________

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Explanation

An example of passive transport is osmosis, which involves the movement of water through a semipermeable membrane

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Explanation

What do you call the pressure exerted by dissolved particles in a solution or a colloid?

Missing
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Explanation

When the osmotic pressure is equal on both sides

When a semipermeable membrane separates two solutions of pure water, the two sides are at —that is, the osmotic pressure is equal on both sides.

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Explanation

When the osmotic pressure is the same on both sides of a semipermeable membrane

When the osmotic pressure is the same on both sides of a semipermeable membrane, each solution is said to be isosmotic or .

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Explanation

Hyperosmotic vs hypoosmotic

  1. When a cell is in a medium with a higher concentration of osmotically active dissolved or colloidal particles, rendering a higher osmotic pressure.  In such a situation, water moves across the cell membrane into the medium that is (also called hypertonic) relative to the solution inside the cell.
  2. When a cell is in a medium with a lower concentration of osmotically active dissolved or colloidal particles, and the solution thus has a lower osmotic pressure than that inside the cell, the cell is said to be in a medium that is (or hypotonic) relative to it, so water moves into the cell.
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hyperosmotic
hypoosmotic
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Explanation

The permeability of different types of plasma membranes varies _________

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Explanation

In the cell membrane are ______ molecules that help move certain substances in and out of the cell

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Explanation

One of the two main types of transport

One of the two main types of transport that involve (1) transparent , as opposed to passive, transport is known as (2) transparent . Here, (3) transparent molecules move substances either in or out of a cell in a manner that (4) transparent the rate of diffusion across the membrane. The mechanism involved combines molecules that are to be (5) transparent across the membrane with the carrier molecules in the membrane. In such a manner, molecules are picked up on one side of the membrane and released on the other side.

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carrier
active
increases
moved
facilitated diffusion
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Explanation

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