| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
What part of the nervous system is responsible for controlling involuntary actions like breathing, swallowing, and heartbeat?
medulla |
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spinal cord |
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cerebrum |
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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.
In cell biology, cytokinesis results in two separate:
chromosomes |
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nuclei |
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cells |
|
chromatids |
During cell division, the cytokinesis phase occurs when cytoplasm and cell membranes complete their separation resulting in two separate cells.
Within DNA, a variety of a particular gene is called a(n):
chromosome |
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homozygous |
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heterozygous |
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allele |
The gene is the base unit of inheritance and is contained within DNA. A gene may come in several varieties (alleles) and there are a pair of alleles for every gene. If the alleles are alike, a person is homozygous for that gene. If the alleles are different, heterozygous.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
liquid |
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solid |
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plasma |
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gas |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
What part of the nervous system controls simple reflexes?
spinal cord |
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medulla |
|
autonomic |
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cerebrum |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.