Fill in the blanks: In an olfactory neuron, the binding of a(n) ______to its membrane receptor triggers a(n)_______potential in the axons of the______nerve.

Verified step by step guidance

1. Identify the role of olfactory neurons in the sense of smell.
2. Understand that olfactory neurons have receptors that bind to specific molecules.
3. Recognize that the binding of an odorant molecule to its receptor initiates a signal.
4. Determine that this signal is an electrical change known as a generator potential.
5. Identify that the axons of the olfactory nerve carry this signal to the brain.

Key Concepts

Olfactory Receptors

Olfactory receptors are specialized proteins located in the membranes of olfactory neurons. They bind to specific odorant molecules, initiating the process of smell. Each receptor is sensitive to particular chemical structures, allowing for the detection of a wide range of odors.

Action Potential

An action potential is a rapid change in the electrical charge across a neuron's membrane, which occurs when a neuron is activated. In olfactory neurons, the binding of an odorant to its receptor leads to depolarization, resulting in an action potential that travels along the axon to transmit the signal to the brain.

Olfactory Nerve

The olfactory nerve, also known as cranial nerve I, is responsible for transmitting sensory information related to smell from the olfactory receptors in the nasal cavity to the brain. It plays a crucial role in the perception of odors and is essential for the sense of smell.