Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
The answer is skin
The first line of defence is your innate immune system. Level one of this system consists of physical barriers like your skin and the mucosal lining in your respiratory tract. The tears, sweat, saliva and mucous produced by the skin and mucosal lining are part of that physical barrier, too.
Answer:
Don't feel anything
Explanation:
When someone has a traumatic accident such as cutting their leg and bleeding heavily it causes them to go into shock which causes them not to feel things, so they may say they are okay but in reality they need to be taken to the ER asap because when the shock wears off there going to be in a lot of pain, and since they are bleeding heavily they will loose tons of blood which will cause them to become weak and pass out which if not taken care of right away can lead to death.
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Answer:
Medicare will enroll you in Part B automatically
Explanation:
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A phobia is an irrational fear of something that's unlikely to cause harm. The word itself comes from the Greek word phobos, which means fear or horror
