age 1 of 44
BIOD 101 MODULE 5 EXAM STUDY GUIDE 2025/2026
QUESTIONS BANK AND CORRECT DETAILED ANSWERS
WITH RATIONALES || 100% GUARANTEED PASS
<BRAND NEW VERSION> Portage Learning
Ligand .....Answer.....is a molecule that has specificity for a given
receptor, and the binding of a ligand to the given receptor
causes a change.
there is a wide array of cell ligands: hormones, peptides, sugars,
and even small, hydrophobic molecules.
regardless of its type, a ligand is always specific for the target
receptor.
,age 2 of 44
this ligand-to-receptor specificity helps to regulate responses in
the target cell while not impacting non-target cells that may be
in the same location.
Intercellular Communication .....Answer.....when the sending cell
releases a ligand and the target cell receives the "message"
(inter = between cells)
Five main types of intercellular signaling: .....Answer.....1.
paracrine signaling
2. synaptic signaling
3. autocrine signaling
4. endocrine signaling
5. direct cell-to-cell signaling
,age 3 of 44
Paracrine Signaling .....Answer.....is a type of local range
signaling, meaning the signal travels over a short distance.
a signaling cell will release vesicles containing the signaling
ligand, and the ligand will then bind to nearby target cells.
this type of signaling occurs in many types of cells and tissues,
and it is of great importance during development and for the
secretion of growth factors.
Synaptic Signaling .....Answer.....is another form of local range
signaling, but it occurs across a synapse.
the pre-synaptic cell is a neuron containing molecules to be
released, and the post-synaptic cell may be another neuron or a
muscle cell.
, age 4 of 44
an electrical signal is propagated down the pre-synaptic cell
and stimulates the release of neurotransmitters.
neurotransmitters diffuse across the synapse and bind to the
target cell.
Synapse .....Answer.....a small gap between the signaling cell
(also called the pre-synaptic cell) and the target cell (also called
the post-synaptic cell).
Neurotransmitters .....Answer.....a class of ligand molecules that
are released from neurons, that are packaged in vesicles.
neurotransmitters have a rapid action and bind quickly to their
target cell to cause a change in the target cell.
BIOD 101 MODULE 5 EXAM STUDY GUIDE 2025/2026
QUESTIONS BANK AND CORRECT DETAILED ANSWERS
WITH RATIONALES || 100% GUARANTEED PASS
<BRAND NEW VERSION> Portage Learning
Ligand .....Answer.....is a molecule that has specificity for a given
receptor, and the binding of a ligand to the given receptor
causes a change.
there is a wide array of cell ligands: hormones, peptides, sugars,
and even small, hydrophobic molecules.
regardless of its type, a ligand is always specific for the target
receptor.
,age 2 of 44
this ligand-to-receptor specificity helps to regulate responses in
the target cell while not impacting non-target cells that may be
in the same location.
Intercellular Communication .....Answer.....when the sending cell
releases a ligand and the target cell receives the "message"
(inter = between cells)
Five main types of intercellular signaling: .....Answer.....1.
paracrine signaling
2. synaptic signaling
3. autocrine signaling
4. endocrine signaling
5. direct cell-to-cell signaling
,age 3 of 44
Paracrine Signaling .....Answer.....is a type of local range
signaling, meaning the signal travels over a short distance.
a signaling cell will release vesicles containing the signaling
ligand, and the ligand will then bind to nearby target cells.
this type of signaling occurs in many types of cells and tissues,
and it is of great importance during development and for the
secretion of growth factors.
Synaptic Signaling .....Answer.....is another form of local range
signaling, but it occurs across a synapse.
the pre-synaptic cell is a neuron containing molecules to be
released, and the post-synaptic cell may be another neuron or a
muscle cell.
, age 4 of 44
an electrical signal is propagated down the pre-synaptic cell
and stimulates the release of neurotransmitters.
neurotransmitters diffuse across the synapse and bind to the
target cell.
Synapse .....Answer.....a small gap between the signaling cell
(also called the pre-synaptic cell) and the target cell (also called
the post-synaptic cell).
Neurotransmitters .....Answer.....a class of ligand molecules that
are released from neurons, that are packaged in vesicles.
neurotransmitters have a rapid action and bind quickly to their
target cell to cause a change in the target cell.
