1. Pathogens enter the body through a cut in the skin
2. Cells recognize the foreign invaders
3. Histamine is released
4. White blood cells travel to the invaded area
Hope it helps.
C. negative proteins inside the cell
Answer:
semipermeable
Explanation:
semipermeable membrane, such as plasma membrane, only allows only some materials such as oxygen—small material. other <em>stuff</em><em> </em>like starch couldn't get in.
Answer:
Option-E
Explanation:
Meta arteriole is a type of vessel present in the micro-circulatory pathway of the human body, which possesses characteristics of both the arteriole and the capillaries.
The structure of metarteriole usually connects the arteriole to the venules and they possess smooth muscle rings at the entrance of the vessel in the capillary and thus acts as a sphincter. This sphincter controls the flow of blood into the venules and capillaries.
The precapillary sphincters are usually closed but when the tissue needs the oxygen the sphincter opens and supplies the blood.
Thus, Option-E is correct.
Answer:
a gene present on the Y chromosome that triggers male development
Explanation:
