Answer:
The hormones involved in the calcium homeostasis are parathyroid hormone, cholecalciferol and calcitonin.
Explanation:
The maintenance of calcium level in the body is important for the proper functioning of body. The increased level of calcium is known as hypercalcemia and low level of calcium in body is known as hypocalcemia.
Hormones that regulate the level of calcium in blood are as follows:
Parathyroid hormone: The parathyroid hormone stimulate the calcium reabsorption in case of hypocalcemia. The osteoclast bone activity increases and calcium reabsorption from renal tubule, increases the calcium level of the body. This maintains calcium homeostasis in the body.
Calcitonin: An increase in the calcium ion concentration stimulates the secretion of calcitonin. The calcitonin hormone inhibits the osteoclast bone reabsorption, decreases the blood level in the body.
Cholecalciferol: This is also known as vitamin D metabolites. This hormone is stimulated in case of low calcium levels. The calcium level can be increased in the body by increasing the phosphate and calcium absorption from the gastro intestinal tract.
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Answer: Hormones
Explanation: Hormones are responsible for the reproductivity in the males and females.Males persist of the reproductive hormones named as testosterone that maintains the feature of the male reproductive organs and production of the sperms.
Female reproductive hormones maintain the fertility for the female reproductive organs for reproduction phase and menstrual cycle.
Answer:
Ground substance:
Ground substance may be defined as the component of extracellular matrix that made up of proteoglycans. The main function of ground substance is to resist the compressive forces.
Collagen fiber:
Collagen fiber may be defined as a type of protein fiber that provides strength to the organism. Collagen fibers are present within the matrix of the cell.
Elastic fiber:
Elastic fiber are presnt in bundles in the extracellular matrix. The amorphous elastin is present in the elastic fiber. This fiber provide elasticity to the cells.
Reticular fiber:
Reticular fiber composed of the type III collagen. The reticular fiber acts as the supportive mesh of the liver and bone marrow. Reticular fiber was discovered by M. Siegfried.
