Describe the interactive roles of the various hormones in the process of parturition
What will be an ideal response?
Answer: During gestation, high estrogen titers enhance the contractile strength of the uterine smooth muscles as well as their expression of oxytocin receptors, while progesterone inhibits uterine contractions. At the end of gestation when progesterone levels decline, the muscles are free from inhibition. Fetal cells produce oxytocin, which stimulates the release of contraction-stimulating prostaglandins. Simultaneously, the maternal posterior pituitary begins secreting oxytocin that collectively with the prostaglandins stimulate uterine smooth muscle contractions. The stress stimulates the release of additional oxytocin and prostaglandins, thereby engaging a positive feedback loop.
You might also like to view...
The pubic symphysis is a fibrous joint.
Answer the following statement true (T) or false (F)
A 55-year-old male was admitted to the hospital with heart failure. He complains of increasing shortness of breath on exertion and needing to sleep on three pillows at night. On physical assessment, the nurse determines that his ankles and feet are very swollen. Which of these symptoms reflect left-sided heart failure and which reflect right-sided heart failure?
What will be an ideal response?
The teniae coli are
A) external pouches along the entire length of the colon. B) bands of smooth muscle on the surface of the colon. C) highly flexible ridges in the mucosa of the colon. D) polyps that obstruct the sigmoid colon and the rectum. E) tumors that are found in the ascending colon.
What lubricates organs and reduces friction as organs move against adjacent structures?
What will be an ideal response?