What part of the eye is controlled by muscles and is unique to each person?
The iris
200
How is loudness measured?
In decibels.
200
Some people are EXTREMELY SENSITIVE to taste, and feel actual pain when eating spicy food. They are called what?
Supertasters.
200
Which is better at sensing smoke, a smoke detector or the human nose?
The nose!
200
Exposed to a stimulus for a long period of time, people may lose the ability to detect it. (For example, smokers lose the ability to smell smoke and people who wear a hat no longer feel it on their head.) What is this called?
Sensory adaptation
300
The optic nerve connects the eye to the brain. What is that place called, based on the absence of rods and cones in the area?
Blind spot
300
Pitch detects the frequency of a sound vibration. How is it measured?
In hertz.
300
What organs are located on the tongue and capture sensations from food molecules?
Taste buds.
300
Why is the sense of smell important for survival?
Helps identify rotten food, gas leaks, smoke, any kind of life-threatening danger.
300
Why did our 5 senses evolve?
Survival!
400
Vision receptors are in what part of the eye?
The retina
400
Sound waves are converted into neural activity through what simple process?
Vibration
400
The ability to taste sweetness from 1 teaspoon of sugar in a 2 gallons of water, or the minimal amount possible for detection, is called what?
The absolute threshold
400
One early sign of Alzheimer's Disease is the inability to identify the smell of what?
Peanut butter
400
Many amputees can still feel sensations in their missing arm or leg. What is this phenomenon called?
Phantom limb pain
500
What is the name of the 2 receptors that distinguish black and white, and color?
Rods and cones.
500
Loud noise can lead to high blood pressure and heart attacks. What is this called when studied by researchers?
Noise pollution
500
Name the 5 distinct tastes. (Must get all 5 for credit!)
Sweet, sour, salty, bitter, umami.
500
The inability to smell anything means that a person will not be able to taste. What is this condition called?
Anosmia
500
What sense is responsible for balance, and informs the brain of how the head is oriented in relation to gravity?