Which of the following statements about receptor potentials is FALSE?
A: Odor molecules can act as stimuli.
B: The receptor potential is carried by neuroglia.
C: The receptor proteins respond to stimuli.
D: They can trigger an action potential.
The correct answer is option B.
The receptor potential is carried by neuroglia.
The activation of a sensory receptor leads to the production of transmembrane potential difference that is more precisely known as the receptor potential.
It falls under the category of graded potential, therefore also called a generator potential. The process of sensory transduction, which refers to the transformation of the sensory stimulus generates the receptor potential.
The primary function of the receptor potential includes the release of the neurotransmitters. The sensory receptors are examples of receptor potential as the taste is transformed into the electric signals.
Receptor potential can trigger an action potential within the same neuron or on an adjacent cell. Within the same neuron, it can cause local current to flow to a region where an action potential can be generated by opening voltage-gated ion channels.
A taste bud is an example of a receptor potential where taste is converted into an electrical signal which is sent to the brain. The taste bud triggers the release of neurotransmitter when get stimulated through the process of exocytosis.
Then, the neurotransmitter molecules diffuse across the synaptic cleft to the postsynaptic membrane of the primary sensory neuron, where they evoke an action potential.