The series of hormonal events that leads to birth:
- Fetal cortisol stimulates the placenta to secrete estrogen.
- The high estrogen level stimulates the uterus to form oxytocin receptors.
- Prostaglandins dilate the cervix, and with oxytocin, increase the strength of uterine contractions.
- Oxytocin stimulates the placenta to secrete prostaglandins.
<h3>What hormones are involved during parturition?</h3>
The female hormones contains in parturition include:
- Estrogen: This plays a main role in uterine contractions.
- Oxytocin: It helps in the uterine contractions during parturition.
- Relaxin
Thus, the series of hormonal events that leads to birth is 2,4,3,1.
To learn more about oxytocin receptors click here:
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Q1. Heredity, cell and metabolism are the characteristic feature that are always present in living organisms
Q2. We shouldn't wrap the dissected body into the original wrapper and give instructor to dispose it off.
<h3><u>Explanation:</u></h3>
Q1. A living organism has several characteristic factors like it has cells, the cell performs metabolic activities and the organism maintains a heredity along its progenies. The living organisms must have cells which leads them to enclose their cellular components inside it. It also must have a metabolic activity to metabolize nutrition into required energy. It also do have a heredity to continue the race it belongs to.
Q2. In the dissection class, after the experiment with dissected body is over, the dissected body needs to be wrapped in fresh polythene or other bags that should be pasted with biohazard stickers and should be eliminated into specific containers that contains other biohazard wastes. The instruments must be washed thoroughly with some antiseptic and soap. The hand gloves should also be dumped within the biohazard containers wrapped in proper bags.
The purpose is to taste test it obviously
Answer: varve analysis
<span>The word varve originated from the Swedish word varv which means revolution in layers and circle. In this particular question, by “varve” we mean an annual layer of sedimentary rocks and varve analysis is the process by which archaeologists can calculate precise dates based on these sediments with known climatic patterns. </span>
