Receptors detect changes in the environment. For a stimulus to elicit a response, certain cells must have an appropriate receptor. Stimulation of the receptor initiates a specific signal pathway.
The external ear structure is called the Pinna.
The Pinna helps to channel sound waves into the ear.
Many animals have the ability to move their pinna towards the direction of sound.
I have attached an image of a dog's ear to show you the external structure called the Pinna.
I hope this helps! I'm happy to answer any other questions you might have :)
[Image sourced from: https://www.msdvetmanual.com/dog-owners/ear-disorders-of-dogs/ear-structure-and-function-in-dogs]
Answer:
How was the government able to make children go to residential school?
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Answer:
Hope it helps!!
Explanation:
According to cell theory, what do each of the following organisms have in common? Each organism is able to photosynthesize. They are all made up of the same kinds of atoms. ... Cells are the basic unit of structure for each organism.
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It's solar, because s</span>olar energy is a renewable resource that is virtually endless as long as the sun shines.<span />