Top answers

Using Fick's Law, explain how rapid gaseous exchange takes place in a mammal

Gaseous exchange of oxygen and carbon dioxide (diffusion) occurs between the alveoli (tiny air sacs) and capillaries (microscopic blood vessels) inside the lung. Diffusion refers to the passive net movement ...
TC
Answered by Timothy C. • Biology tutor
15338 Views

How does an electrical impulse travel the gap between two nerves?

The electrical impulse that travels along a nerve, known in biology as an action potential, gets passed along to an adjacent nerve as a chemical signal. When an action potential reaches the end of a nerve, i...
LM
Answered by Lucy M. • Biology tutor
5365 Views

Describe key structural differences between prokaryotic and eukaryotic cells.

Eukaryotic cells are larger and more complex than prokaryotic cells. The eukaryotic cell contains a nucleus, which contains genetic material in the form of linear chromosomes. However, prokaryotic cells cont...
TD
23856 Views

Can lymphocytes have proteins that are complementary to host cell antigens?

You only kill off the ones that are reactive to host antigens (read: the ones that would attack your own cells!). So normal lymphocytic function isn't affected. Because of the nature of the immune system (yo...
SM
Answered by Scott M. • Biology tutor
3794 Views

Explain the process of mitosis

Mitosis is a form of cell division in which one cell (mother cell) divides into 2 genetically identical cells (daughter cells). Within the human body, mitosis replaces worn-out cells with new cells. Mitosis ...
HL
Answered by Hannah L. • Biology tutor
44902 Views