Question

the nuclear gyromagnetic ratio is

A specific property Of given nucleus

A value that depends upon the magnetic field strength

Dependent upon the number of electrons

Related to the radius of the nucleus

compared to water, potassium ions

Easily pass through a lipid membrane

Are restricted by size in passing through a lipid membrane

Have a strong binding affinity to lipids

Have a low permeability for passage

asap please

Answer 1

Answer 1

(ii) A value that depends upon the magnetic field strength

This answer is correct.

Answer 2

(iv) Have a low permeability for passage

This answer is correct.

The lipid membrane is highly permeable to lipid-soluble molecules, and the membrane is not permeable to ions.

The membrane is highly permeable to non-polar (fat-soluble) molecules. The permeability of the membrane to polar (water soluble) molecules is very low. But water can pass through the lipid membrane due small size (it diffuse through membrane due to its small size as rate of diffusion depend on size of the molecule). The permeability is particularly low to large polar molecules. The permeability to charged molecular species (ions) is very low. Therefore, the passage of most molecules and ions is aided by the presence of specific membrane transport proteins.

Charged molecules, such as ions, are unable to diffuse through a lipid membrane regardless of size; even H⁺ ions cannot cross a lipid membrane by free diffusion.