Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
what happens if embryonic stem cells that are cultured on a dish are injected into the blastocoel embryo of a mouse?
What is another component that is required for SAM maintenance?
What is used to calculate the frequencies of alleles in a population?
What type of evolution does analogous structures show?
What type of evolution does homologous structures show?
Structure and relationships of proteins
Who is responsible for early development of evolutionary concepts?
Is evolution in medicine or agriculture an example of artificial selection or natural selection?
1. exposure must occur acutely2. area must be total or near total body3. exposure must be from external sources of radiation4. radiation must be penetrating to reach internal organs5. dose must be large > .7 Gy or 70 cGy
At the end of 6th month, ___________ cells product Surfactant
Capillaries begin to bulge into terminal sacs establishing the blood air barrier is a characteristic which period of lung development?
type II penumocytes begin to secrete __________ during the Terminal Sac Period.
Cells lining the sac called __________ , become thinner, so that surrounding capillaries protrude into alveolar sacs.
A function of the blood air barrier is to permit.......
The intimate contact between Type I alveolar cells and endothelial cells make up the ___________
T or F. Surfactant is not sufficient between the 3-8 years old
T or F. Surfactant production decrease during the last (2) weeks of birth
T or F. By the end of 7th month, alveolar sacs are present. A premature infant may survive
The mesodermal germ layer differentiates into what (3) mesoderm layers?
T or F. Alveolar pressure is directly proportional to surface tension (T) and inversely proportional to the radium of the alveolus. (Law of LaPlace)