Sedimentary Layers in Which Grain Size Decreases from Bottom to Top

question 60

True/False

Sedimentary layers in which grain size decreases from bottom to top are called graded beds.

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Definitions:

Blood Calcium Levels

The concentration of calcium ions in the bloodstream, crucial for bone health, muscle contraction, and nerve function.

Calcitonin

A hormone produced by the thyroid gland that helps regulate calcium levels in the blood by decreasing the concentration of calcium.

Parathyroid Hormone (PTH)

A hormone secreted by the parathyroid glands that regulates calcium and phosphate levels in the blood.

Nervous System

The network of nerve cells and fibers that transmits nerve impulses between parts of the body, overseeing both voluntary actions and the functioning of internal organs.