Answer: Lower lumbar
Explanation:
The spinal column is refered to as the vertebral column and it's the central axis of skeleton. It supports the trunk, provides attachments to muscles, and helps in the protection of the spinal cord.
The area of the spinal column that is subject to the greatest mechanical stress and degenerative changes is Lower lumbar.
Because many people don't know enough about sun damage to protect themselves from developing skin cancer.
Answer:
Both technician are correct.
Explanation:
According to the statement, the opinion of both technicians is going in the same direction which is, NOT to use the older parts for the sake of repairing a machine. The usage of old parts would temporarily fix the problem but it has the potential of causing bigger damages in the long run.
The answers are; geographical isolation and temporal isolation.
In temporal isolation, because the different species have different mating seasons, so even though their habitats overlap, they do not interbreeding is rare. Geographical isolation also plays a role because the different species are found predominantly in different sites during breeding, some in the woodland, some in the lowlands and others in streams.
According to the research, the primary purpose of membrane channels is to circulate ions, and of membrane pumps is to maintain differences in ionic concentration.
<h3>What are membrane channels and pumps?</h3>
They are pores in the cell membrane through which ions circulate for muscle contraction or membrane potential changes that may depend on a ligand or voltage, depending on whether their opening is determined by the binding of a ligand or by changes of voltage.
In this sense, membrane pumps is the mechanism of active ion transport, consuming energy across a membrane against an electromechanical gradient to maintain differences in ion concentration between the intracellular and extracellular space.
Therefore, we can conclude that according to the research, the primary purpose of membrane channels is to circulate ions, and of membrane pumps is to maintain differences in ionic concentration.
Learn more about membrane channels and pumps here: brainly.com/question/11090806
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