Receptors detect changes in the environment. For a stimulus to elicit a response, certain cells must have an appropriate receptor. Stimulation of the receptor initiates a specific signal pathway.
A not true
B not true
C could be true
D not true
Answer:
A. The spleen filters pathogens from blood
Explanation:
-The spleen is sometimes called the “filter of the blood”
-It works closely with the circulatory system for transportation needs and the lymphatic system for production of lymphocytes.
Catalyst maybe ( lower activation energy).
Eukaryotes are the<span> type of cells that typically do not contain cilia or a flagella.
The ones that do are called prokaryotes.</span>
