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12 Cards in this Set

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In general, how do sensory systems code information about the amount and kind of energy?
The sensory systems are able to code informations about the amount of stimulus energy. They are able to tell to tell quantity from how strong the stimuli is. The stronger the stimuli the larger the receptor potential and the faster the rate if action potential is. The brain interprets a stimulus strong if it has a fast action potential and weak when it has a slow action potential. Quality stimulus is coded depending on the receptors that are tuned into respond to different forms of energy. The eye has three different types of receptor cells.
In general, how do sensory systems code information about the amount and kinda of enegy?
example
In the ear different receptors are most sensitive to different sound frequencies.
In general how do sensory systems code information about the amount of energy?
- code info about the amount of stimulus energy
-telling queanity from the strength of the stimulus
-the stronger the stimuli= larger receptor potential
-the stronger the stimuli=the faster the rate of action potential is
-brai interprets stimuli as strong if it has a fast action potential and weak when slow actoion potential
In general, how do sensory systems code info about the kind of energy?
-coded depending on the receptors that are tuned into respond to different forms of energy
What is the value of sensory adaptation? How can you demonstarte that adaptation can occur in neurons in the brain, just not in receptors?

WHAT IS THE DEFINITION OF SENSORY ADAPTATION?
the change in sensitivity that occurs when a sensory stimulus is or is not stimulated for a length of time
What is the value of sensory adaptation? How can you demonstarte that adaptation can occur in neurons in the brain, just not in receptors?

What is the value of sensory adaptation?
-When you walk into a room a bright room from a dark room you can't see but your vision soon adjusts

-as sensory system increases for a long time it adjusts and becomes less sensitive and vice versa
What is the value of sensory adaptation? How can you demonstarte that adaptation can occur in neurons in the brain, just not in receptors?

How can you demonstarte that adaptation can occur in neurons in the brain, just not in receptors?
-plugging one nostril while smelling something strong until you get used to it
-unplus the other and smell with it
-you will find you are still adjusted
-therefore adaptations from smell partially happen from changes in neourons in the brain that recive imput from both nostrils
What antonomical characteristics of our species are consistant with the possibility that we produce and respond to pharamones? What observations and reasoning suggest that we do not produce sex-attractant pharamones?

What antonomical characteristics of our species are consistant with the possibility that we produce and respond to pharamones?
-huimans have glands in the skin located in the hair bearing regions such as armpits and genitals that secrete odorous substances
- hair then old onto the secretions and allow them to eveaporate
-this resembles the same glands in other mammals
What antonomical characteristics of our species are consistant with the possibility that we produce and respond to pharamones? What observations and reasoning suggest that we do not produce sex-attractant pharamones?

What observations and reasoning suggest that we do not produce sex-attractant pharamones?
-other mammals have sex-attractant pharammones and humans do not
-mamals mate only at certain times of the year while humans mate whenever they want
From an evolutionary perspective (a) what is the function of each of the primary tates; (b) why do so many chemicially diverse substances tatse bitter; (c) why does bitter sensitivity increases in women at pregnancy?

(a) what is the function of each of the primary tates;
-salty, sweat, and umami are pleasant tastes and motivate us to eat certain foods
- sugars in fruits serve as a source of energy
-umami comes from a protein which we need to build and restore tissue
From an evolutionary perspective (a) what is the function of each of the primary tates; (b) why do so many chemicially diverse substances tatse bitter; (c) why does bitter sensitivity increases in women at pregnancy?

b) why do so many chemicially diverse substances tatse bitter
-because they are evolutionary bad for us
- decaying things prosuce acid compounds so our ancestors have developed unpleasant taste
From an evolutionary perspective (a) what is the function of each of the primary tates; (b) why do so many chemicially diverse substances tatse bitter; (c) why does bitter sensitivity increases in women at pregnancy?
(
c) why does bitter sensitivity increases in women at pregnancy?
-women are more cabable of tatsing bitter things than men are
- in first 2 monthes of pregnancy women become even more sensitive to bitter foods to protect the fetus from poisions that are hughly dangerous to them