Answer:
Heart valves or the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole and the closure of the aortic valve and pulmonary valve at the end of ventricular systole.
Explanation:
The heart tone “lub,” or S1, is caused by the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole.
The heart tone “dub,” or S2 ( a combination of A2 and P2), is caused by the closure of the aortic valve and pulmonary valve at the end of ventricular systole.
Answer:
The correct answer is - A only.
Explanation:
The phospholipid membrane that is hydrophobic layer which permits movement of the molecules with the help of various transport protein or carrier proteins only if they are large or hydrophilic in nature such as water, however small molecules like hydrophobic molecules like lipids move through phospholipid by simple diffusion.
Rapid movement of the lipid is not need specific transport protein to cross phospholipid of the plasma membrane because of their hydrophobic nature. It also allows rapid movement in transport of the CO2 and Oxygen.
Thus, the correct answer is - A only.
Hola!
Human skin are made from various tissue.
In us there are four basic types of tissue, That are :
→ Epithelial tissue
→ Muscular tissue
→ Nervous tissue
→ Connective tissue
[ note: There are many sub-tissues in human skin but mainly these four are considered ]
hope it helps!
None of these seem to be correct, but it seems c is due to a disproved myth that essentially is the only thing close to an answer.
Change in bone structures is the best thing i could think of.
