which process is most ofter used to control homeostasis in the human body?
2007-02-23 04:34:02 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Biology
Negative Feedback is constantly occuring to maintain homeostasis, positive feedback however often occurs due to large homeostatic changes. I cannot recall what hormonest exactly (mabye progesterone), but Positive Feedback is important during pregnancy.
2007-02-23 05:01:42 · answer #1 · answered by PSGui 1 · 2⤊ 0⤋
When the fraction of the output of an amplifying device fed back to the input has the same phase as the input signal, i.e. the feedback reinforces the input signal, it is called a positive feedback. When the feedback opposes the input signal, it is a negative feedback. The negative feedback is much more common and has some distinct advantages such as reducing distortion etc.
Perhaps the actual query is in the latter part of the question. Sorry, I have no ideas on this subject.
2007-02-23 05:10:22 · answer #2 · answered by rabi k 2 · 0⤊ 0⤋
Negative feedback is when the effect caused by a stimulus tends to reduce or eliminate the stimulus. For example, your house's thermostat has a negative feedback function. When the house is cold, the thermostat measures it, notes that the temperature is below the set point, and turns on the furnace to heat the rooms. (So, the stimulus of the temperature being low is removed.) This is usually used in homeostasis, which is the process of maintaining relatively constant physiological conditions in the body.
Positive feedback is when the effect caused by a stimulus tends to increase the stimulus. An example is the milk let-down reflex in nursing mothers. The baby suckles, which triggers the release of the hormone oxytocin. This causes the milk to flow. The baby drinks it, and suckles more, so more hormone is released, and more milk is released (etc.). The body uses a positive feedback cycle occasionally, when it wants to make a change relatively rapidly.
2007-02-23 09:08:42 · answer #3 · answered by kt 7 · 0⤊ 0⤋
Usually, negative feedback is more common. Negative feedback functions to prevent something from being overloaded by decreasing its content and vice versa. For positive feedback, a substance is produced even more if it has already existed. For example, when there is too much sugar in our blood, insulin will respond by converting the glucose into glycogen while increase the metabolic rate. This is to decrease the sugar content, thus, negative feedback. For positive feedback, when a woman is on labour and she has to contract her cervical and uterine muscle. The existence of prostaglandin and oxytocin induce the contraction. Their existing amount stimulates more of them being produced. Hence, more contractions. This is positive feedback.
2007-02-23 04:48:00 · answer #4 · answered by Anonymous · 0⤊ 0⤋
For the best answers, search on this site https://shorturl.im/VbK5Q
A is somewhat correct but C is way more accurate. When something is high, neg feedback will bring it down, pos feedback will bring it even higher. But when something is low, neg feedback will bring it up, pos feedback will bring it even lower. its more about direction, pos feedback goes in the same direction, neg goes in the opposite! both have receptors, control centers and effectors so the rest are ruled out
2016-03-28 00:59:15 · answer #5 · answered by Anonymous · 0⤊ 0⤋
negative feedback differ positive feedback
2016-02-01 00:18:13 · answer #6 · answered by Sula 4 · 0⤊ 0⤋
I would say the answer is C Negative feedback opposes variation of normal but positive feedback exaggerates it.
2016-03-15 23:59:45 · answer #7 · answered by Anonymous · 0⤊ 0⤋