Answer:
The answer to fill in the blank in this question: Some hormones act through cell membrane receptors that stimulate adenylate cyclase activity and production of:____, would be: cAMP.
Explanation:
In the process of hormonal regulation of cells there are two ways in which this can happen: direct activation of DNA inside a cell through steroid hormones, who do not need any kind of mediators to enter the cytoplasm of a cell and activate its genetic material, or indirect activation, which is the common way for non-steroidal hormones, such as epinephrine. In this second scenario a hormone will reach the cell and lock onto a receptor on the plasma membrane. The effect is that a G-protein, which is adjacent to the receptor, activates the second-messenger system, meaning that the activity the hormone came to initiate, will depend on these mediators. the G-protein will then activate adenylate cyclase, which in turn will activate ATP and transform it into cAMP. It is cyclic AMP (cAMP) which will finally relay the original message sent through the hormone, to the genetic material of the cell.
B and C are both reasonable answers
Answer:
b. phenotypic variation of a trait in a particular population.
Explanation:
Heritability describes a statistical measure that indicates variation in phenotypes (traits present) in a particular population.
An estimate of heritability of a trait is specific to a studied population in a determined environment, and it could change over time as circumstances often change. Heritability estimates range in a scale from zero to one.
Factors leading to this will be both ambient, and genetical. The case below exemplifies envirnoment impact.See below for a clearer view:
Answer:
The cell is the small portion of living matter that constitutes the structural and functional unit of all living beings, formed by genetic material and cytoplasm and delimited by the plasma membrane that enables interaction with the environment.
Explanation:
All living beings are made up of basic units called cells; for this reason it is said that the cell is the structural unit of living beings. In the cell, all the functions and chemical reactions necessary for life are carried out; in addition, it participates in the reproduction processes. Different parts of the cell are distinguished, from the outside to its center. The fundamentals are: cell membrane (delimits and regulates), cytoplasm (organelles) and nucleus (DNA). The cell originates from a single cell, the egg or zygote, which occurs after the union of the gametes (ovum and sperm). Although many species of living beings are capable of reproducing without the participation of gametes, all in some generation do so through this mechanism. The cell is the simplest living being and, therefore, performs its three vital functions: nutrition (the function of uptake of matter and energy), relationship (the capture of stimuli and the emission of adequate responses) and reproduction. Cells have the ability to renew themselves either by growth or by reproduction, cell growth is limited to the manufacture of cellular materials, while reproduction allows the generation of new cells from existing ones. In unicellular organisms, new individuals originate; in multicellular cells, the number of cells increases, making possible the growth of the individual or the renewal of what had been damaged.
