What is intramembranous ossification?
the formation of bone from preexisting hyaline cartilage models
the formation of bone from preexisting elastic cartilage models
the formation of bone from preexisting fibrocartilage models
the formation of bone from fibrous membranes

Answer is (D)

Explanation:

Intramembranous Ossification is the procedure in which development of bones from fibrous membranes.It is engaged with the development of the mandibles,the clavicles and the level bones of the skull.Hardening starts as mesenchymal cells structure a layout of things to come bone.They at that point separate into osteoblasts at the hardening community.Osteoblasts emit the extracellular framework and store calcium, which solidifies the network.

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.