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NU110 CH3 & CH12 CELLS & BLOOD EXAM QUESTIONS WITH COMPLETE SOLUTIONS $10.49
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NU110 CH3 & CH12 CELLS & BLOOD EXAM QUESTIONS WITH COMPLETE SOLUTIONS
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NU110 CH3 & CH12 CELLS & BLOOD EXAM QUESTIONS WITH COMPLETE SOLUTIONS cell membrane all living cells in multicellular organisms have a surrounding environment the outer layer of your skin separates your body from its cell membrane (also known as the plasma membrane) the cell membrane sepa...

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  • May 10, 2024
  • 36
  • 2023/2024
  • Exam (elaborations)
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NU110 CH3 & CH12 CELLS & BLOOD EXAM QUESTIONS WITH

COMPLETE SOLUTIONS


cell membrane

all living cells in multicellular organisms have a surrounding

environment

the outer layer of your skin separates your body from its

cell membrane

(also known as the plasma membrane)

the cell membrane

separates the inner contents of a cell from its exterior environment.

cell membrane

provides a protective barrier around the cell and regulates which materials can pass in

or out.

phospholipids

The cell membrane consists of two adjacent layers of

interface

The lipid tails of one layer face the lipid tails of the other layer, meeting at

the____________of the two layers.

outward,

The phospholipid heads face

water in the intracellular fluid.

,Because the phosphate groups are polar and hydrophilic, they are attracted to

Intracellular fluid (ICF)

is the fluid interior of the cell.

Extracellular fluid (ECF)

is the fluid environment outside the enclosure of the cell membrane.

Interstitial fluid (IF)

is the term given to extracellular fluid not contained within blood vessels.

fluid

An important feature of the membrane is that it remains

lipids and proteins in the cell membrane

not rigidly locked in place

tail to tail

The phospholipid bilayer consists of two adjacent sheets of phospholipids, arranged

The hydrophobic tails associate with one another, forming

the_______________interior of the membrane.

The polar heads

contact the fluid inside and outside of the cell.

cell membrane,

The lipid bilayer forms the basis of the

integral proteins and peripheral protein

Two different types of proteins that are commonly associated with the cell membrane

are the

integral protein

,is a protein that is embedded in the membrane.

channel protein

an example of an integral protein that selectively allows particular materials, such as

certain ions, to pass into or out of the cell.

proteins and cholesterol, some with carbohydrate groups attached.

The cell membrane of the cell is a phospholipid bilayer containing many different

molecular components, including

cell recognition proteins

Another important group of integral proteins are

cell recognition proteins

serve to mark a cell's identity so that it can be recognized by other cells

recognition protein

A receptor is a type of__________that can selectively bind a specific molecule outside

the cell, and this binding induces a chemical reaction within the cell.

ligand

he specific molecule that binds to and activates a receptor

receptor and an ion channel

Some integral proteins serve dual roles as both a

dopamine

example of a receptor-ligand interaction is the receptors on nerve cells that bind

neurotransmitters, such as

ions

, When a dopamine molecule binds to a dopamine receptor protein, a channel within the

transmembrane protein opens to allow certain_______to flow into the cell.

Peripheral proteins

typically found on the inner or outer surface of the lipid bilayer but can also be attached

to the internal or external surface of an integral protein

Peripheral proteins

typically perform a specific function for the cell.

digestive enzymes

Some peripheral proteins on the surface of intestinal cells, for example, act

as_________________________________o break down nutrients to sizes that can

pass through the cells and into the bloodstream.

Cell membran

Has the ability to regulate the concentration of substances inside the cell

The membrane's lipid bilayer structure

provides the first level of control

nonpolar

the lipid tails of the membrane are

water-soluble materials—like glucose, amino acids, and electrolytes—

need some assistance to cross the membrane because they are repelled by the

hydrophobic tails of the phospholipid bilayer.

passive transport and Active transport

All substances that move through the membrane do so by one of two general methods.

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