Answer:
B) The "lub-dub" sound originates from blood turbulence through the heart.
Explanation:
The systole and diastole in the heart produce the lub and dub sound in the heart.
The systole represents the contraction of both left and right ventricles and pumps the blood to the body and the right ventricle to the lungs. This involves the opening and closing of the valves. The closing of the atrioventricular valves produces lub sound.
At the end of the systole or ventricular contraction or when the blood has been pumped to the aorta and the pulmonary valves then the semilunar valves present in the aorta and pulmonary closes. This produces a sound dub.
Therefore,lub dub is associated with the physical contraction of the heart but not the turbulence of the blood.
Thus, the selected option is the correct answer.
The Molecule that contain the smallest number of Hydrogen atoms is Al(OH)3. It has three hydrogen atoms.
Answer:
Yes
Explanation:
I would consider greatly my choices in trans fats after knowing this
<span>The scientific study of the distribution and
abundance of organisms and the interactions that determine distribution
and abundance. This definition encompasses not only the plants and
animals that Haeckel recognized but microscopic organisms such as Bacteria, Archaea and protozoa, as well.</span>
The correct option is CHEMICAL ENERGY.
Chemical energy are stored in the bond of chemical compounds, when these compounds undergoes chemical reactions, the energy inside their bonds is release as energy. Gasoline as a chemical substance is made up of bonds which have inherent energy within them, when a vehicle is put in an ignition mode, the energy in the chemical bonds are broken and energy is released to carry out work in the car system.
