| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
__________ and __________ pair to strengthen bones.
calcium, vitamin A |
|
iron, calcium |
|
vitamin D, calcium |
|
vitamin D, magnesium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
Which of the following is the primary difference between a comet and an asteroid?
asteroids have a coma |
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comets orbit the Sun |
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comets have an atmosphere |
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asteroids contain frozen water |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
What is a major difference between the somatic and autonomic nervous systems?
one is inherited, the other is learned |
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one controls thinking, the other controls feeling |
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each belongs to a different nervous system |
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one controls voluntary activity, one controls involuntary activity |
Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
Heat is always transferred from __________ to __________ environments.
cooler, warmer |
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warmer, cooler |
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empty, dense |
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dense, empty |
Heat is always transferred from warmer to cooler environments and conduction is the simplest way this transfer can occur. It is accomplished through direct contact between materials and materials like metals that transfer heat efficiently are called conductors while those that conduct heat poorly, such as plastic, are called insulators.
The respiratory and circulatory systems are similar in that they:
deoxygenate blood |
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add carbon dioxide |
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transport oxygen |
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transport nutrients |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.