Circulatory System
Joints and Levers
Light and The Eye
Sound and The Ear
Grab Bag
100
Arteries carry blood _____ ______ the heart
away from
100
A joint is the place where two ______ meet.
bones
100
Photoreceptors are cells in your eye that respond to _____.
light
100
What does your ear collect, transmit and convert?
Sound waves
100
A 3rd class lever always has a mechanical advantage ___ than 1
less
200
Veins carry blood _____ _____ the heart
back to
200
The leg is an example of a ____ class lever.
2nd
200
What nerve sends electrical impulses from your eye to your brain?
the optic nerve
200
After being collected by the external ear, sound is funneled down what tube?
the ear canal
200
Men are more likely to be colorblind than women because the gene for colorblindness is on the ___ chromosome.
X
300
A _________ is a flap of tissue that keeps blood flowing forwards
valve
300
An example of a 3rd class lever in the body is the ____.
arm
300
What are the three colors your eyes can process?
Red, Green and Blue
300
At the end of the ear canal, what structure vibrates in response to sound waves?
the eardrum
300
As the frequency of sound waves goes up, the pitch of the sound goes ____.
up
400
The _______ are the smallest blood vessels
capillaries
400
Which class of lever is this? 
1st
400
The lens in your eye changes shape so that the focal point is always on this: the name for the back of your eye.
the retina
400
The malleus, incus and stapes trasmit vibrations from the eardrum to the _____.
cochlea
400
What is the tiny, fluid-filled cavity in the inner ear?
the cochlea
500
A sphygmomanometer measures ___________.
blood pressure
500
The formula for mechanical advantage is:
Output Force / Input Force
500
Which lens is better for seeing things up close: a thick one or a thin one?
thick lens
500
The fluid in the cochlea is essential to hearing and _____.
balance
500
After being refracted by a lens, the point where light rays meet is called the _____ _____.
focal point