B)<span>When you listen to the heart sounds, you are hearing the flow of blood which stops abruptly when a heart valve closes. This produces the "lub-dub" sounds. 1st heart sound (when the Mitral Valve closes) as the ventricle contracts (systole) and then 2nd heart sound (when the Aortic Valve closes) and the ventricle starts to fill again (diastole)
</span><span>The pulse is the wave of pressure you can feel through the artery walls. This denotes systole.
</span><span>The ECG's QRS complex is the electrical signal that tells the Ventricles to contract. You can see that the QRS occurs right at the beginning of systole and triggers Isovolumetric contraction.
</span><span>So the QRS on the ECG, the pulse wave you can feel (ie. the rise in aortic pressure) and the 1st heart sound all signify SYSTOLE.
</span><span>there a delay between systole of the ECG and the resulting pulse felt in the finger (R-Pulse) </span>because it takes a little bit of time for the pressure to transmit through the body, as the finger is not on the heart (if it was there would be no delay)
<span> There will be fewer natural resources available for future generations.
Hope this helped! (=</span>
Answer: Lets choose a food processing company for scientific study.
Explanation:
Scientific study is the study which involves taking observations on the samples being studied experimentally. Drawing evidences from observations to prove a scientific fact.
In a food based company, several scientific tests are required to be done to check the shelf-life, quality, quantity of the ingredients, and to check whether they are fit for consumption or not all of these parameters have to checked through experimental procedures.
Answer:
the answer is b.
Explanation:
The inside of bone is called marrow, which is responsible for creating blood cells, vital to homeostasis. obviously, bone gives us support, and shape.
so, out of the choices, the answer is b.
Explanation:
They are useful as they can predict the genetic probability of a particular phenotype arising in a couple's offspring. In other words, it can tell you if you will or will not have a certain trait.