Communication between cells always involves four components, including a signaling cell, a signaling molecule, a receptor, and a target responding cell. Mark each of the following statements about cell communication true or false

Question

____ Signaling molecules are always secreted from the signaling cell.
____ The distance travelled by the signaling molecule to the responding cell varies
tremendously depending on the signal.
____ A specific signaling molecule may bind to receptors on more than one kind of cell.
____ Receptors for signaling molecules are always integral membrane proteins on the
surface of responding cells.
____ Signaling molecules involved in endocrine signaling are always hydrophobic hormones
like testosterone.
____ Peptide signaling molecules are only involved in paracrine or autocrine signaling.
What will be an ideal response?

Answer 1

f Signaling molecules are always secreted from the signaling cell.
t The distance travelled by the signaling molecule to the responding cell varies tremendously
depending on the signal.
t A specific signaling molecule may bind to receptors on more than one kind of cell.
f Receptors for signaling molecules are always integral membrane proteins on the surface of
responding cells.
f Signaling molecules involved in endocrine signaling are always hydrophobic hormones like
testosterone.
f Peptide signaling molecules are only involved in paracrine or autocrine signaling.