Ivy Tech APHY 201 Exam 1 Exam Questions
with Correct Verified Solutions 100%
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A signal molecule must be removed from a receptor as soon as... -
ANSWER-the receptor has been activated, to free up the binding site
for the next signal molecule
.Active site - ANSWER-The area of an enzyme that causes the protein
to make the reaction occur
.Active transporters - ANSWER-ATP-requiring carriers that move
molecules in specific directions across membranes, regardless of the
concentration gradient. Constantly trying to maintain K+ and Na+ who
constantly leak in and out of the cell
.Affinity - ANSWER-Some molecules will have a stronger attraction for
the binding site than others
.Agonists - ANSWER-Alternate signals that bind to and activate the
receptor
,.Amino acid-based molecules are categorized by... - ANSWER-the
number of amino acids in the strand
.An increase in cytostolic Ca++ causes... - ANSWER-binding of Ca++ to
a cytosolic protein, calmodulin
.Anions - ANSWER-Negatively charged ions
.Antagonists - ANSWER-Molecules that bind to, but do not activate
the receptor
.Antiporters - ANSWER-Transport 2 different types of molecules in
opposite directions across the membrane
.As long as a signal molecule is bound to a target cell receptor... -
ANSWER-that receptor remains activated
.At the point of saturation, an increase in substrate concentration... -
ANSWER-no longer gets an increase in response rate
.Atom - ANSWER-The smallest particle of any element
.Autocrines (local communication) - ANSWER-Molecules secreted by a
cell to the extracellular fluid that act on the secreting cell
,.Binding of a specific signal molecule... - ANSWER-opens the channel,
which changes membrane permeability to a specific ion
.Binding of the lower affinity substrate may be favored if... - ANSWER-
they greatly outnumber the higher affinity substrate molecules
.Binding site competition - ANSWER-Related substrate molecules will
compete for the binding site
.Binding to the integrin receptor site causes... - ANSWER-a change in
the arrangement of cytoskeletal proteins resulting in changes in cell
shape, or movement of the cell
.Breaking chemical bonds ________ energy - ANSWER-consumers
.Ca++ can diffuse... - ANSWER-into the cytosol from the extracellular
fluid or from the sarcoplasmic reticulum within the cell
.Ca++/calmodulin complexes - ANSWER-Activate intracellular
enzymes or membrane transporters
.CAM proteins act like receptors - ANSWER-Interaction between CAM
proteins of one cell with another's causes activation of specific
responses in those cells
, .Carboxyl group - ANSWER-Gives the molecule an acidic quality
.Carrier proteins - ANSWER-A protein that binds to specific molecules
and transfers the membrane by changing its shape
.Cations - ANSWER-Positively charged ions
.Cell membranes - ANSWER-Selectively permeable barriers separating
chemical environments inside and outside the cell
.Cells may replace existing proteins with... - ANSWER-higher or lower
affinity forms
.Change the specificity of receptors - ANSWER-Receptor can bind
more or fewer different signal molecules
.Changing the availability of the signal - ANSWER-1) Change the rate
of secretion of the signal
2) Introduce alternate signal molecules
.Channel proteins - ANSWER-A group of proteins that form a water-
filled protein cylinder through the membrane
with Correct Verified Solutions 100%
Guaranteed Pass
A signal molecule must be removed from a receptor as soon as... -
ANSWER-the receptor has been activated, to free up the binding site
for the next signal molecule
.Active site - ANSWER-The area of an enzyme that causes the protein
to make the reaction occur
.Active transporters - ANSWER-ATP-requiring carriers that move
molecules in specific directions across membranes, regardless of the
concentration gradient. Constantly trying to maintain K+ and Na+ who
constantly leak in and out of the cell
.Affinity - ANSWER-Some molecules will have a stronger attraction for
the binding site than others
.Agonists - ANSWER-Alternate signals that bind to and activate the
receptor
,.Amino acid-based molecules are categorized by... - ANSWER-the
number of amino acids in the strand
.An increase in cytostolic Ca++ causes... - ANSWER-binding of Ca++ to
a cytosolic protein, calmodulin
.Anions - ANSWER-Negatively charged ions
.Antagonists - ANSWER-Molecules that bind to, but do not activate
the receptor
.Antiporters - ANSWER-Transport 2 different types of molecules in
opposite directions across the membrane
.As long as a signal molecule is bound to a target cell receptor... -
ANSWER-that receptor remains activated
.At the point of saturation, an increase in substrate concentration... -
ANSWER-no longer gets an increase in response rate
.Atom - ANSWER-The smallest particle of any element
.Autocrines (local communication) - ANSWER-Molecules secreted by a
cell to the extracellular fluid that act on the secreting cell
,.Binding of a specific signal molecule... - ANSWER-opens the channel,
which changes membrane permeability to a specific ion
.Binding of the lower affinity substrate may be favored if... - ANSWER-
they greatly outnumber the higher affinity substrate molecules
.Binding site competition - ANSWER-Related substrate molecules will
compete for the binding site
.Binding to the integrin receptor site causes... - ANSWER-a change in
the arrangement of cytoskeletal proteins resulting in changes in cell
shape, or movement of the cell
.Breaking chemical bonds ________ energy - ANSWER-consumers
.Ca++ can diffuse... - ANSWER-into the cytosol from the extracellular
fluid or from the sarcoplasmic reticulum within the cell
.Ca++/calmodulin complexes - ANSWER-Activate intracellular
enzymes or membrane transporters
.CAM proteins act like receptors - ANSWER-Interaction between CAM
proteins of one cell with another's causes activation of specific
responses in those cells
, .Carboxyl group - ANSWER-Gives the molecule an acidic quality
.Carrier proteins - ANSWER-A protein that binds to specific molecules
and transfers the membrane by changing its shape
.Cations - ANSWER-Positively charged ions
.Cell membranes - ANSWER-Selectively permeable barriers separating
chemical environments inside and outside the cell
.Cells may replace existing proteins with... - ANSWER-higher or lower
affinity forms
.Change the specificity of receptors - ANSWER-Receptor can bind
more or fewer different signal molecules
.Changing the availability of the signal - ANSWER-1) Change the rate
of secretion of the signal
2) Introduce alternate signal molecules
.Channel proteins - ANSWER-A group of proteins that form a water-
filled protein cylinder through the membrane
