Once action potential is reached, the gated ion channel open to allow ___ to rush into a neuron A) sodium ions
B) calcium ions
C) potassium ions
D) ATP

Which best describes the structure of dna?

Awic dietitian is meeting with a client who has an infant and a young child. the mother says that the young child is a very picky eater and will only eat crackers and juice. the health worker notices that the child's hair is brittle, his nails tear easily, and the skin inside his lower eyelids is very pale. these are all signs of iron deficiency.

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?