Sensory Receptors

What are sensory receptors and how do they limit or affect the kinds of things that an animal (or you) perceives in the world? Provide examples from the book, the news or your own experience.

Sensory receptors are cells that are specialized to sense environmental energies and convert them into action potentials. There are seven types of sensory receptors. Mechanoreceptors sense sound. Chemoreceptors detect specific molecules. Photoreceptors respond to light. Thermoreceptors perceive heat. Electroreceptors respond to electricity. Magnetoreceptors detect magnetic fields. Nociceptors sense pain.

Not all animals are equipped with each of these types of receptors. Humans cannot sense magnetic or electrical fields because we do not have the sensory receptors to do so. Animals also have limited ranges for perception. For example, humans are cannot hear every frequency of sound or see every wavelength of light.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s