Final answer:
The statement 'There are three times as many CD8 cells than CD4 cells' is generally false; the ratio of CD4 to CD8 cells is usually about 2:1. CD8 cells make up a significant proportion of T cells but not strictly one-fourth. These ratios may vary with health conditions.
Step-by-step explanation:
The question refers to CD1, which is often associated with the immune system and T cells. However, the question fragments provided appear to be incorrect or incomplete. Focusing on correct information about CD8 and CD4 cells, here's what we know:
CD8 and CD4 are markers found on the surface of T cells and they differentiate between two main types of T cells. CD8+ T cells, also known as cytotoxic T cells, are primarily involved in the direct killing of infected or cancerous cells. CD4+ T cells, or helper T cells, play a crucial role in orchestrating the immune response, including stimulating other immune cells.
The statement 'There are three times as many CD8 cells than CD4 cells' is generally false. In a healthy individual, the ratio of CD4 to CD8 cells is usually about 2:1, though this can vary.
Furthermore, the statement 'CD8 cells make up about one-fourth of the total number of cells' lacks context. If referring to the total number of T cells, CD8 cells usually represent a significant but varying proportion, not strictly one-fourth.
It's important to remember that these numbers can change in certain conditions or diseases, such as HIV/AIDS, where the number of CD4 cells can significantly decrease.