Biology Test 9

When air with low oxygen tension (anemia) is breathed for some length of time, the cell count rises due to the liberation of erythropoietin or haemopoietin or erythrocyte stimulating factor (ESF).

Synergism is a condition that occurs when two or more hormones produce the same effects in a target cell and their results are amplified.

Succus entericus is the other name of intestinal juice. Intestinal juice is consists of a variety of enzymes such as disaccharidases like maltase, dipeptidases, lipases, nucleosidases. Nucleases are not present intestinal juice. These enzymes are present in pancreatic juice which breaks nucleic acids into nucleotides.

Seed is the final product of sexual reproduction in plants. It is the ovules which develop into seeds. The ovary and its wall develop into the fruit and fruit wall called pericarp, respectively. The Integuments of ovules hardens to form the tough protective seed coats.

In animal husbandry, breeding is one of the main aspects that aim at increasing the yield and desirable qualities in animals. When breeding is done between animals of the same breed, it is called inbreeding and when it is done between different breeds, it is called outbreeding. Continued inbreeding, however, results in reduction in the fertility and even productivity, called as inbreeding depression. To overcome this issue, outbreeding is followed that usually helps restore fertility and yield.

Englemann gave action spectrum. It is a graphical representation of the relative rate of photosynthesis at different wavelengths of light. In his experiment he studied the action spectrum on spirogyra using bacteria that needed oxygen that is aerobic bacteria. When he put splitted light on the spirogyral strand, after sometime he observed that the bacteria colonized at both the ends that is at the portion of blue and red light.

Systole is the muscular contraction of the heart or of any chamber of it. Commonly, it is used to refer to the ventricles of the human heart. During this stage the openings for CSA and PT are open, so the blood leaves the ventricles.