Ad
related to: examples of positive feedback physiology in the body pictures
Search results
Results From The WOW.Com Content Network
The Hodgkin cycle represents a positive feedback loop in which an initial membrane depolarization leads to uncontrolled deflection of the membrane potential to near V Na. The initial depolarization must reach or surpass a certain threshold in order to activate voltage-gated Na + channels .
Shivering — shaking of the body in response to early hypothermia in warm-blooded animals. Sneeze or sternutation — a convulsive expulsion of air from the lungs normally triggered by irritation of the nasal mucosa in the nose. Startle-evoked movement — involuntary initiation of a planned movement in response to a startling stimulus ...
A number of examples of positive feedback systems may be found in physiology. One example is the onset of contractions in childbirth , known as the Ferguson reflex . When a contraction occurs, the hormone oxytocin causes a nerve stimulus, which stimulates the hypothalamus to produce more oxytocin, which increases uterine contractions.
This bistability is most obvious in the transition between the follicular and luteal phases, and arises from interactions between positive and negative feedback loops involving GnRH, LH, FSH, estrogen, and progesterone. The kisspeptin system creates a switch-like mechanism driving the transition from negative to positive feedback.
According to Anokhin, in the structure of the behavioral act afferent feedback compared with the acceptor of the result gives a positive or negative situational emotions affect the correction or termination of action (another type of emotion, leading emotions, are associated with satisfaction or dissatisfaction needs in general, with the ...
Proprioceptive feedback is also linked to motor deficits in Parkinson's disease and cerebral palsy. People with cerebral palsy often suffer from spasticity due to hyperreflexia. [ 13 ] A common clinical test of spasticity is the pendulum test, in which the subject remains seated and the relaxed leg is dropped from horizontal.
For example, a study published in the journal, which involved more than 300 men with ED, found that men who consumed above-average amounts of alcohol were more likely to develop headaches and ...
Final Structural Differentiation The pituitary gland achieves its final form, including the complete separation of anterior and posterior lobes, by the end of the first trimester The gland remains connected to the hypothalamus by the pituitary stalk, allowing it to integrate signals from the brain and regulate various endocrine functions in the ...