During exercise, there is an increase in total blood flow due to a faster and stronger heartbeat and because blood is removed from the “reservoirs” of the veins to the active circulation. There is also a redistribution of blood. In contrast, less total blood flow is distributed to the abdominal organs, slowing digestive processes; less is transported to the kidneys, which decreases urine output to maintain blood volume and blood pressure.
I think that all of the above are correct.
if you have to pick 1. i would suggest that you pick A.
dose this help?
The lungs expand and with that you breathe in air as the diaphram contracts and relaxs to cause "breathing"
<h2>Cell Cycle
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Explanation:
Eukaryotes grow and divide by cell cycle.
The main parts of a cell cycle are an ordered series of events – Gap 1 or G1 phase, Synthesis or S phase, Gap 2 or G2 phase, and the mitosis or M phases.
Interphase period (G1, S, G2 phases) - cell grows by size, duplicates its content, replicates its DNA, and finally prepares for mitotic cell division
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Mitosis and cytokinesis - formation of two identical daughter cells
Cell cycle is regulated by regulatory or restrictive checkpoints in the cell cycle which are activated with detection of a defective DNA.
Proliferation of undesired or cells with defective DNA like in case of tumor cells is controlled by the action of suppressing agents like p53 and cyclins.
The tumor suppressor gene protein p53 prohibits division of tumor cells. Cyclins regulate cell cycle by activation of the enzyme cyclin-dependent kinase.
