The hormone that increases osteoclastic (bone break down) activity to release more calcium ions into the bloodstream is Parathyroid Hormone.
- Low level of Calcium in the blood stream stimulates the release of Parathyroid Hormone from Parathyroid gland.
- This hormone in turn stimulates bone cells to release the stored Calcium thereby increasing Calcium concentration.
- Parathyroid glands are located on the back side of Thyroid gland.
- These glands are responsible for the regulation of Calcium and Phosphorus.
- Calcium levels in blood and body should be equal and Calcium perform various functions of body such as Muscle contraction, Blood clotting, Bone rigidity.
- Hence any disturbance in the harmony of Calcium between blood and bone triggers release of Parathyroid Hormone from the Parathyroid gland.
Therefore from the above points we can conclude that Para Thyroid Hormone increases osteoclastic activity.
Learn more about Para Thyroid Hormone:
brainly.com/question/8563691
#SPJ4
Replication is the process where DNA molecules copies itself to form another DNA molecule during cell division. it involves several enzymes which includes DNA helicase, the enzyme that unwounds the DNA double helix. RNA primase, it is an enzyme that creates an RNA primer. DNA polymerase, it is the enzyme that matches and lays down nucleotides to form the new DNA daughter. DNA ligase joins the Okazaki fragments by catalysing the formation of phosphodiester bond.
Dissolved oxygen refers to the oxygen present in water which is necessary for many forms of aquatic life. Any change in the amount of dissolved oxygen affects the aquatic life.
Fishes, invertebrates and the aquatic plants need dissolved oxygen for respiration. Microbes like bacteria and fungi also require it for the breakdown of organic matter. A decrease in dissolved oxygen affects the growth, reproduction of fishes and mortality of fishes rises. This results in the accumulation of dead fishes called the fish kill leading to water pollution. Decrease in dissolved oxygen also affects the growth of other aquatic forms and results in the accumulation of organic material in the water body. This is because it results in increased BOD (biochemical oxygen demand) which is the amount of oxygen required by the aerobic microorganisms to breakdown the organic matter.
The phenotype expressed is dominant
Answer:
D) It decreases water movement.
Explanation:
Humus is known as part of the soil formation. It is characterized by various qualities some of which include containing nutrients such as nitrogen. It is also characterized by its ability to retain water content or soil moisture. Humus is made from the decays of plants wastes such as leaves.
Hence, in this case, the correct answer is Humus is important because "It decreases water movement."