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Describe the electrical activity that occurs during the cardiac cycle?

The cardiac cycle, by convention, is considered to begin with depolarisation of the sino-atrial node (SAN). This depolarisation spreads across the two atria, causing the right and left atria to contract. The...
LK
Answered by Luke K. • Biology tutor
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Describe how an atheroma may lead to a myocardial infarction.

An atheroma is the deposition of fatty material in the innermost lining of an artery (caused by the process of 'atherosclerosis'). Atheromas have a tendency to rupture and this increases the likelihood of th...
JW
Answered by Jovian W. • Biology tutor
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La vida nuestra es cada vez más rápida, lo que es perjudicial para nuestra salud. Desarrolla el tema

No puede haber ninguna duda de que la velocidad de la vida moderna está beneficiando nuestra salud. Ser capaz de completar varias tareas en un período de tiempo más corto nos da más tiempo para gastar hacien...
CD
Answered by Charlie D. • Spanish tutor
2931 Views

Supposing y = arcsin(x), find dy/dx

Suppose: y = arcsin(x) Then, x = sin(y) And, dx/dy = cos(y) ----- (1) Using: dy/dx = 1/(dx/dy); Thus 1 becomes: dy/dx = 1/cos(y) ------ (2) Using: sin^2(y) + cos^2(y) = 1; We can rearrange 2 to: dy/dx = 1/sq...
JN
Answered by James N. • Maths tutor
7341 Views

There are 420 balls in a ball pool. There is a combination of violet, blue, yellow and green balls. 2/7 are violet, 35% are blue and the ratio of yellow to green is 4:5. How many of each colour ball is there in the ball pool?

Together, the total number of balls is 420. 2/7 of the total 420 balls are violet. Therefore the number of violet balls can be calculated by the equation 2/7 x 420/1 = 840/7=120. There are 120 violet balls i...
LW
Answered by Lauren W. • Maths tutor
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