| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
Neurons are part of the __________ nervous system.
central |
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somatic |
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autonomic |
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peripheral |
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.
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?
reflection |
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convection |
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conduction |
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radiation |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
The energy posessed by a thrown baseball is an example of what kind of energy?
gravitational |
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kinetic |
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potential |
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transitional |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Regulation of heart rhythm occurs in:
nerves |
|
cerebellum |
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cerebrum |
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medulla |
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.
Absolute zero is which of the following?
0°C |
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the freezing point of hydrogen |
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the freezing point of oxygen |
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the coldest temperature possible in the universe |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.