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Contractions in the uterus of a pregnant woman push a baby into the birth canal. When this happens contractions in the uterus increase. Which feedback mechanism is used to deliver the baby?
Wiki User
∙ 7y ago
Unlike negative feedback, positive feedback'sare less common in the human body system.
During the childbirth process, women will experience a decrease in the hormone named PROGESTERONE. This hormone is believed to initiate a small contractions of the uterus.
Oxytocin causes much stronger contractions of the uterus. As the contraction increase in seize and length the baby moves towards the opening of the uterus.
The descend of the baby causes stronger contractions, which release more oxytocin, which causes stronger contractions until the baby expels. Once the baby is expelled from the uterus the uterine contractions stop.
The uterine contractions stop, stops the release of oxytocin, which stops the contracts as well. The hypothalamus stimulates the release of hormones by the pituitary gland.
Wiki User
∙ 7y ago
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How might a person exhibit positive feedback communication?
Positive feedback increases the original stimulus. An example is labor contractions. The initial contraction signals the body to release hormones that increase the frequency and intensity of subsequent contractions.
How does the cardiovascular system increase pressure?
Contractions of the heart.
A contraction in which there is no change in muscle length but there is a great increase in muscle tension is?
isometric contractions
What is a feedback mechanism in the skeletal system?
A feedback mechanism in a the skeletal system includes the bone narrow allowing calcium level to increase
Is Hardening or tightening of stomach during pregnancy normal?
Yes. Those are braxton hicks contractions. very normal. These practice contractions occur at various times during pregnancy, but can increase in intensity during your last month. They happen at random and are typically not painful. They do not dilate the cervix as real contractions do.
What are the effects of cardiotonics and anticoagulant merdication?
cardiotonics increase the strenght of the muscle contractions that pump blood from the heart.
Which hormones is regulated by a positive feedback mechanism?
Best example of positive feedback is the release of oxytocin during childbirth. Oxytocin is a reproductive hormone in females. Though it is also secreted in males, its function is yet unclear. Secretion of oxytocin occurs in response to nervous stimulation of the hypothalamus. It stimulates and enhances labor contractions. During the movement of the baby towards the birth canal, messages from pressure receptors within the cervix reach the brain to produce oxytocin. Released oxytocin travels to the uterus through the bloodstream and stimulates the uterine wall muscles to contract stronger. These contractions intensify gradually and increase until the baby comes out of the birth canal.Labor contractions are stopped when the stimulus to the pressure receptors ends and when oxytocin production stops in turn. Another means of oxytocin release is during lactation where the nipple sends impulses to the hypothalamus upon suckling, leading to contraction of the myoepithelial cells and expulsion of milk under positive feedback control.
What is the latent phase of labor?
During the latent phase, progress is usually very slow. It may take quite a while and many contractions before the cervix dilates the first few centimeters. Contractions increase in strength as labor progresses.
From oxytocin and prostagladins which increase uterine muscle contraction?
Oxytocin stimulates the uterine muscles to contract and also increases the production of prostaglandins, which increase the contractions further. Manufactured oxytocin is sometimes given to induce labour if it has not started naturally or it can be used to strengthen contractions to aid childbirth.
Is control of blood glucose levels a negative feedback?
If high blood pressure is at play then a negative feedback system would reverse this. Through this negative feedback the stimulus of increased pressure is reversed or decreased by decreasing heart rate which decreases the blood pressure. If low blood pressure is at play the negative feedback system would also be appropriate because your body needs to reverse this stimulus. Your heart rate would increase to increase blood pressure. NOTE: Positive Feedback system enhances or further intensifies the stimulus so we would not want that for blood pressure. This is seen for birth contractions. You want to intensify contractions to enable the baby to get out of the canal. However, usually you need some external event to turn off the positive feedback or it could be fatal. In this case the baby is born so that stops the contractions.
What is The main effect of the warm up period of athletes as the muscle contractions increase in strength?
they warm up their muscles to avoid damaging them
What kind of feedback mechanism help maintain homeostasis causing a stimulus to increase?
YES, + feedback systems enhance or intensify the stimulus. Eg. of a + feedback system = childbirth
