<span>They have setae covering their bodies.
They have a one-way digestive system.</span>
Answer:
Mast Cells
Explanation:
Mast cells release histamine in the blood stream, when they detect a substance that triggers an allergic reaction, also called an allergen.
The correct answer should be loss.
When your skin is cut open, obviously a little blood will run out as a result of that. This case is no different - the person who fell and has an abrasion on the knee will experience a slight loss of blood through that tiny wound which is the result of them falling on the ground.
Hi! so yea C. Nerves stimulated, hypothalamus signals muscles and skin, shivering and vasoconstriction activated, temperature falls
