A continual "lub-dub, lub-dub" is a common way to characterize the sounds. The mitral valve and tricuspid valve closing is the source of the first "lub-dub." Following the first "lub-dub," the second "lub-dub" is made by the aortic and pulmonary valves shutting.
A blood backflow brought on by the heart's mitral valve failing to seal securely. When the mitral valve of the heart fails not close completely, blood can flow backward inside the heart, a condition known as mitral valve regurgitation. Breathing difficulties, weariness, dizziness, and an erratic, fluttering heartbeat are all symptoms. Treatment might not be necessary for everyone. Between the heart's two right chambers is where the tricuspid valve is located. There are three little flaps of tissue that make up the tricuspid valve (called cusps, or leaflets). These valve flaps open to let blood to flow from the right atrium, which is the upper chamber, to the right chamber, which is the lower chamber (right ventricle).
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Answer:d.acts as a sedative
Explanation:
Caffeine is a stimulant. It has a stimulating effect on the central nervous system. It has a ability to suppress the brain receptor like adenosine.
The inhibition of adenosine will lead to suppression of sedative effects it causes.
Even low doses of caffiene can reduce drowsiness and fatigue.
One should avoid or limit caffeine because it is mildly addictive, it may cause irritability, and it may cause sleeplessness. But caffeine is not a sedative.
Answer:
topiramate may have teratogenic effects that cause a newborn to develop a cleft lip with cleft palate.
Explanation:
A: allow them chest to completely recoil after each compression.
B: Depth of compressions at least 2 inch and no more than 2.4inch
C: Rate of 100-120/m