Systemic.....................................................................
Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Answer:
https://sharemylesson.com/blog/addressing-xenophobia-schools
A. Ignore the problem and try to interact with him normally
<h2>
C. Target Cell</h2>
The specific cell a hormone binds to is called a target cell