The chordae tendineae of the av valves are anchored to the Papillary muscle of the ventricle of the ventricles.
Chordae tendinae are code like tendons that connect the papillary muscles to the tricuspid valve and the mitral valve. (atrioventricular valves). This papillary muscle are located in the ventricle of the heart and they attach to the cusps of atrioventricular valve.
<h3>What is chordae tendineae ?</h3>
The chordae tendineae are thin, strong, inelastic fibrous cords that run from the free edge of the atrioventricular valve cusps (the tricuspid and mitral valves) to the apices of the papillary muscles in the right and left ventricles, respectively. The singular chorda tendinea is a rare term.
- One of the mitral valve leaflets may completely lose tension due to a primary chordae tendineae rupture (CTR), at which point it will flail. This frequently causes the MR to suddenly worsen, resulting in fainting and/or acute congestive heart failure (CHF).
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The correct answer is D: I and II only.
Viruses have protein capsids, which protect their genetic material. This capsid sometimes is covered by viral envelopes which have glycoproteins on their surface. Glycoproteins help in the process of binding to the host cell and infecting it. In this example, virus III has the structure of a bacteriophage and it does not seem to have glycoproteins. Bacteriophages use their tail fibers to attach to the bacterial host and inject their genetic material. On the contrary, viruses I and II have glycoproteins sticking out of their envelopes.
This can be because of their genetics. The siblings may not have inherited their parents looks, but maybe they inherited their grandparents looks, or even their aunts looks. This is all due to genetics. It's sort of the same thing, when two caucasian parents have an african-american child. That would be because somewhere along the family tree someone was african-american.
Anyways, I hope this helps!