Which Statement About Capillaries Is True

question 27

Multiple Choice

Which statement about capillaries is true?

• A) Capillaries are the principle sites in closed circulatory systems where blood releases oxygen,nutrient molecules,and hormones.
• B) Oxygen must diffuse across 2-10 layers of epithelial cells to exit capillaries and reach its target cells.
• C) Capillaries are more numerous than arterioles but less numerous than venules.
• D) The lumen of capillaries is large enough for 2-10 red blood cells to flow adjacent to one another.
• E) Capillaries are only found near specialized brain and lung cells.

---

Definitions:

Factorial Design

An experimental setup that allows researchers to study the effects of two or more independent variables simultaneously on a dependent variable.

Main Effect

In statistical analysis, the direct impact of an independent variable on a dependent variable.

Interaction Effect

Occurs when the effect of one independent variable on the dependent variable differs depending on the level of another independent variable.

Scientific Inquiry

The diverse ways in which scientists study the natural world and propose explanations based on evidence gathered.