| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
Menstruation occurs when:
the zygote is formed |
|
the fetus is formed |
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the ovum becomes fertilized |
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the ovum fails to become fertilized |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
Regulation of heart rhythm occurs in:
cerebrum |
|
cerebellum |
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medulla |
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nerves |
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 the classification of life, which of the following is not a domain?
eukaryota |
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animalia |
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bacteria |
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archaea |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
In the metric system, what prefix represents 10-3?
centi |
|
kilo |
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mega |
|
milli |
In the metric system, milli is the prefix for 10-3.
The brain and spinal cord make up the __________ nervous system.
somatic |
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central |
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peripheral |
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autonomic |
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.