Multiple Choice
Which of the following correctly distinguishes a key structural difference between electrical and chemical synapses?
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14. Cell Signaling
Overview of Cell Surface Receptors
Multiple Choice
In the context of cell surface receptors, what makes a cell responsive to a particular hormone?
A
Expression of the specific receptor for that hormone on the cell surface (or appropriate cellular location) that can bind the hormone and initiate signaling
B
The cell’s possession of any membrane protein capable of binding a wide range of hormones with equal affinity
C
The hormone’s ability to diffuse through the plasma membrane, making receptors unnecessary for responsiveness
D
High intracellular ATP levels, which alone determine whether the cell can respond to hormonal signals
Verified step by step guidance1
Understand that cell responsiveness to a hormone depends primarily on the presence of specific receptors that can recognize and bind that hormone.
Recognize that these receptors are usually proteins located on the cell surface or sometimes inside the cell, positioned to interact with the hormone effectively.
Note that the binding of the hormone to its specific receptor triggers a signaling cascade inside the cell, leading to a physiological response.
Realize that not all membrane proteins can bind hormones; specificity is key, meaning only receptors with high affinity for a particular hormone will mediate responsiveness.
Conclude that factors like hormone diffusion or intracellular ATP levels alone do not determine responsiveness without the presence of the correct receptor.
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