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Explain the way in which blood moves throughout the heart, including nodes and valves.

First, the blood enters through the right and left atria. The atrioventricular valves are closed, so the blood pools up inside them. Then, the sinoatrial node (SAN) sends a pulse for the atria to contract...

Answered by Nicole R. • Biology tutor

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Explain how chemical transfer across a synapse occurs.

The nerve impulse will reach the end of the presynaptic neuron, where voltage-gated calcium channels are opened due to depolarisation. Calcium ions then diffuse into the presynaptic neuron, resulting in v...

Answered by Olivia S. • Biology tutor

1790 Views

. “¿Qué adelanto científico del futuro, por ejemplo la manipulación genética, la exploración espacial o la creación de nuevas fuentas de energía, mejorará más la condición humana?” Discuta.

Personalmente, opino que la creación de nuevas fuentes de energía no será la solución para mejorar nuestras condiciones futuras. Por el contrario, apostaría por el uso más frecuente de energías renovables...

Answered by Amiran Mahtani M. • Spanish tutor

1492 Views

Explain why the economy always returns to Yf in the new classical model.

Graph to accompany answer
The economy is initially in equilibrium where LRAS = AD = SRAS. Real output is Yf and the average price level is P. If there is a decrease in government spending i...

Answered by Tolu A. • Economics tutor

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