Kidneys play a major role in helping to maintain proper levels of Na and K ions in the blood. If the kidneys fail to function properly, one of the direct consequences would be.

Kidneys play a major role in helping to maintain proper levels of Na and K ions in the blood. If the kidneys fail to function properly, one of the direct consequences would be "impaired nerve impulse transmission".

Explanation:

The propagation of a nerve impulse from one side of a neuron to the other happens as a result of electrical changes throughout the neuron membrane. The membrane of an unstimulated neuron is polarized — that is, the electrical charge differential between the external and the internal of the membrane.

A nervous impulse is transferred from a pre-synaptic neuron to a post-synaptic neuron through the synapse and Via the use of neurotransmitter diffusion. This increases the voltage in the neuron, allowing the calcium channels on the pre-synaptic neuron to open up.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.

answer: b

coz red blood cells marrow and circulates the body for 120 days.