| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
fats |
|
minerals |
|
water |
|
salt |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
The coldest point in the Earth's atmosphere is reached in which atmospheric layer?
thermosphere |
|
troposphere |
|
stratosphere |
|
mesosphere |
In the mesosphere, temperature again drops as altitude increases until the coldest point in the Earth's atmosphere, the mesopause, is reached where temperatures fall to −225 °F (−143 °C).
The __________ nervous system controls voluntary actions.
somatic |
|
autonomic |
|
peripheral |
|
central |
Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.
Which of these is not a recognized blood type?
O |
|
AB |
|
AO |
|
B |
Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.
Within DNA, a variety of a particular gene is called a(n):
chromosome |
|
allele |
|
heterozygous |
|
homozygous |
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.