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What is the role of progesterone in the menstrual cycle?

The primary role of progesterone is to thicken the lining of the uterus in order to prepare for pregnancy. It thickens the endometrium that allows for implantation of the embryo. The progesterone also inh...

Answered by Anna G. Biology tutor
3971 Views

What is the definition of osmosis?

There are some key components which define osmosis in relation to simple diffusion. Osmosis is the movement of specifically water. In addition, it occurs through water channels (aquaporins). Osmosis occur...

Answered by Bea F. Biology tutor
2540 Views

Describe how differential gene causes the production of specialized cells from stem cells. (A-Level)

All stem cells contain the same genes, but not all of these genes are expressed. Signalling causes certain genes to become activated within a stem cell. Only these activated genes are transcribed into mRN...

Answered by Maymoona E. Biology tutor
2398 Views

Explain why: a) Fluorine is more electronegative than chlorine b)∆H hydration fluoride is more negative than ∆H hydration chloride

a) The fluorine atom is smaller than the chlorine atom, and there is less shielding from other shells of electrons. Thus the bonding pair of electrons are more attracted to the positive nucleus.

b)...

Answered by Osama S. Chemistry tutor
17697 Views

Explain how the potential difference across the neuronal cell membrane changes during conduction of an action potential

Normal neuronal resting potential is around -70mV - this is maintained by sodium-potassium pumps. When the neuron is stimulated, sodium ion channels begin to open, allowing sodium ions to diffuse back int...

Answered by Melissa S. Biology tutor
5114 Views

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