Answer:
the number of oxytocin receptors on the cell surface
Explanation:
The increase of the number of hormone receptors present on the surface of target cells increases the sensitivity of such cells to the hormone. Oxytocin is a neuropeptide hormone produced by the hypothalamus and released by the posterior pituitary gland. This hormone acts as a neurotransmitter that binds to oxytocin receptors in order to trigger a molecular cascade that finalizes with the activation of the enzyme Phospholipase-C. Oxytocin receptors are found in different types of brain cells including, for example, the amygdala and hippocampus (where oxytocin binds). This hormone acts as a chemical messenger that modulates brain functions associated with the reproductive system (i.e., childbirth and lactation) and human behavior.
Answer:
Option A, it is more rapid than the primary response and results in higher antibody levels.
Explanation:
When an antigen contacts the immunity system for the first time it leads to a primary immune response. Since it is the first interaction, it requires more time to produce effect.
While a secondary response occurs when the same antigen attacks the same person second , third or n number of times. During secondary response, the body already has a memory of primary immune response and thus it is faster.
Hence, option A is correct
Answer:
Nucleotides contain three characteristic components: a nitrogenous base, a pentose, and one or more phosphate groups.
Explanation:
During his visit to the islands, Darwin noted that the unique creatures were similar from island to island, but perfectly adapted to their environments which led him to ponder the origin of the islands' inhabitants.
Among those that struck Darwin so greatly were the finches that are now named in his honor. Darwin would later base some of his thought from the supposing that these finches were all descendents of the same lineage.
