| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
Regulation of heart rhythm occurs in:
nerves |
|
medulla |
|
cerebrum |
|
cerebellum |
Part of the brainstem, the medulla is the connection between the brain and the spinal cord. It controls involuntary actions like breathing, swallowing, and heartbeat.
Which of the following states of matter exists at the lowest temperature?
gas |
|
none of these |
|
solid |
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liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This describes which of Newton's laws of motion?
fourth |
|
second |
|
third |
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first |
Also known as the law of inertia, Newton's first law of motion states that An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
convection |
|
radiation |
|
conduction |
|
reflection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
The heart __________ blood.
creates |
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oxygenates |
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filters |
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deoxygenates |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.