| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
In the metric system, what prefix represents 10-3?
kilo |
|
centi |
|
milli |
|
mega |
In the metric system, milli is the prefix for 10-3.
The brain and spinal cord make up the __________ nervous system.
central |
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peripheral |
|
somatic |
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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.
Gametes have how many pairs of chromosomes?
46 |
|
2 |
|
23 |
|
4 |
Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.
In cell biology, what part of the cell contains organelles?
cytoplasm |
|
cell wall |
|
cell membrane |
|
nucleus |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
What part of the nervous system controls simple reflexes?
autonomic |
|
cerebrum |
|
medulla |
|
spinal cord |
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.