| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.36 |
| Score | 0% | 67% |
Which of blood component carries oxygen?
white blood cells |
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red blood cells |
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plasma |
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platelets |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of the following describes the Earth's outer core?
solid |
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makes up most of the Earth's volume |
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primarily solid |
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liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
During digestion, after proteins are broken down where does the undigested food go next?
small intestine |
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stomach |
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large intestine |
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esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
The brain and spinal cord make up the __________ nervous system.
central |
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peripheral |
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autonomic |
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somatic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.
Vector quantities are fully described by which of the following?
a magnitude only |
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a direction only |
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a magnitude and a direction |
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a direction and a polarity |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)