Tutor profile: Ana D.
Quels sont les deux auxiliaires de la langue Française ? Quelle est leur conjugaison au passé simple ?
Les deux auxiliaires sont les verbes être, et avoir. Au passé simple le verbe être se conjugue de la manière suivante: Je fus Tu fus Il fut Nous fûmes Vous fûtes Ils/elles furent Pour le verbe avoir, cela donne: j'eus tu eus Il eut Nous eûmes Vous eûtes Ils/elles eurent
What would you say is the reason for the resting membrane potential in a cell in humans?
The resting membrane potential comes initially from the repartition of ions on both side of the membrane: indeed the concentrations, and therefore the charges are split differently across the membrane. Because of the differences in permeability for each ion, it creates an electrical potential. In the case of humans, it is mostly due to Na+ and K+ ions. Na+ concentration is higher on the outside of the cell whereas K+ concentration is higher on the inside. The membrane is more permeable to K+, meaning that the charges flowing through the membrane don't compensate each other thus resulting in an electrical potential.
What is the only bone in our body that is not articulated with any other bone? Where is he located, and what are his key roles?
The hyoid bone. It is located below the mandible and above the thyroid cartilage. Its primary function is to anchor the tongue. It is used in swallowing, masticating and slightly in voice production.
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