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Is Oxytocin release a positive or negative feedback control mechanism?
Wiki User
∙ 13y ago
positive
Wiki User
∙ 13y ago
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How is the level of oxytocin controlled by a positive-feedback mechanism?
The oxytocin in blood stimulates the pituitary to secrete more oxytocin.
Is it true oxytocin release is an example of a positive feedback control mechanism?
Yes
Is a control mechanism that intensifies an earlier reaction A sensory receptor An effector Negative feedback Positive feedback?
sensory receptor
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.
When the body reacts to stop or work in the opposite direction of a stimulus is it known as negative feedback or positive feedback?
negative feedback
How is the level of oxytocin controlled by a positive-feedback mechanism?
The oxytocin in blood stimulates the pituitary to secrete more oxytocin.
Is it true oxytocin release is an example of a positive feedback control mechanism?
Yes
Is oxytocin an adenohypophyseal secretion?
no, it's release is the effect of a positive control feedback mechanism
Is blood calcium level a positive or negative feedback mechanism?
positive
Are positive feedback and negative feedback both components of homeostasis?
No, negative feedback is the primary homeostatic mechanism regulating the endocrine system. Positive feedback is used much less frequently.
What is a positive feedback mechanism?
A positive feedback mechanism is a system the responds to perturbation in the same direction as the perturbation. A positive feedback mechanism allow cells to adapt to changes in their environment rapidly and efficiently. Positive feedback allows cells to reach new levels of equilibrium corresponding to the stimulus in the environment
Is negative feed back the primary homeostatic mechanism that keeps a variable close to a particular value?
Yes. Negative feedback reacts to a variance by opposing it. (ie. Your body has low [O2], so you increase respiratory rate which does the opposite, pushing up your [O2]) Positive feedback is rare and reacts to a variance by supporting it. (eg. In childbirth a woman's cervix expands and her body releases Oxytocin, due to the high levels of Oxytocin the cervix can expand further which releases more Oxytocin.)
Is a control mechanism that intensifies an earlier reaction A sensory receptor An effector Negative feedback Positive feedback?
sensory receptor
Is blood pressure negative or positive feedback?
Is the clotting of blood an example of positive or negative feedback?
What is positive mechanism involving oxytocin?
Hormonal induction of labor
What hormones are regulated by positive feedback under certain circumstances?
Oxytocin in the process of giving birth. Oxytocin causes uterine contraction, which causes the baby to push up against the cervix, which causes more oxytocin to be released. And the cycle continues until the baby is born.
What hormone induces labor?
oxytocin and prostaglandin (oxitocin sends positive feedback to prostaglandin)
