How do moths detect pheromones?

How do moths detect pheromones?

Moth sex pheromones are detected by receptors on structures called sensilla on the antennae.” Conventional wisdom is that the feathery, bipectinate antennae in moths, arranged like two combs with numerous branches, provide a larger surface area to house the pheromone-detecting sensilla, he says.

What determines the direction of diffusion?

What determines the direction of diffusion? The relative concentration of the substance in different areas determines the direction of diffusion. Diffusion occurs from regions of high concentration to regions of low concentration.

In which direction will SALT move explain your answer?

Water will move in the direction where there is a high concentration of solute (and hence a lower concentration of water. Salt is a solute, when it is concentrated inside or outside the cell, it will draw the water in its direction.

What do moths use pheromones for?

While they rest during the day late at night female moths release pulses of a sex-pheromone blend to attract their mates (Itagaki and Conner, 1988). Pheromones are species-specific odors with properties of hormones. They signal the physiological state of the individual insect to their conspecifics.

What are moth pheromones?

Moth sex pheromones are normally released by adult females during “calling” behavior and tracked by the conspecific males over a long distance. The reception of these chemical signals is conducted by specialized pheromone receptors (PRs) expressed in specific olfactory sensory neurons (OSNs) in antennal sensilla.

What factor determines the direction in which substances flows across a membrane?

What factor determines the direction in which molecules will move during osmosis? the concentration of water determines the direction in which molecules will move during osmosis. the point at which water molecules enter and leave a cell at the same rate. the concentration inside and outside of the cell are equal.

How does salt move across the cell membrane?

How are they able to do so? Sodium ions pass through specific channels in the hydrophobic barrier formed by membrane proteins. This means of crossing the membrane is called facilitated diffusion, because the diffusion across the membrane is facilitated by the channel.