Answer:
The cardiac electrical impulse normally begins spontaneously in the SA node because this area of the heart has a special type of cells that are depolarized very fast creating an action potential that expands through the rest of the heart causing the contraction of it. Also, the Sinoatrial node is located in the right atrium, which is the first section of the heart that has to be contracted to start the cardiac cycle.
Explanation:
The sinoatrial node is known as the heart natural peacemaker. It is a group of cells in the heart's walls that produces a spontaneous potential action to contract the heart. The SA node is located in the right atrium, which is the first area of the heart that is contracted in order to start the cardiac cycle.
Answer:
I can help Ahmed by being a friend to him and helping him find a place to live before their parents kick him out.
Explanation:
Ahmed is going through a lot of stressful situations, which can be making him very upset, scared and causing him to have trouble sleeping. As these problems have affected Ahmed's emotional condition, it would be necessary for him to look for a health professional who could help him with all problems, especially in relation to insomnia. However, I can help him by being a friend to him, giving him emotional support and helping him find a home to live in, before his parents kick him out.
Answer:Most likely Skin
Explanation:Skin covers your body so no diseases get in.
Answer:
50mg or 100mg this is the answer not sure