In vertebrates, neural connections exist between retina and hypothalamus and pacemaker may be located in ventromedian nucleus of hypothalamus. In amniotes, the pineal and parietal bodies regulate photoperiodism. Melatonin secreted by pineal gland has anti-gonadotropic effect. Turtles synthesize serotonin dur...
but the new type has a long, flexible stringlike structure. Researchers found the first of these strange proteins in flies and named it using a combination of an informal Japanese word meaning weak or not rigid and the diminutive suffix normally attached to young boy’s names, “hero-hero...
such as Magnetic Resonance Imaging (MRI) without causing harm to the patient or damage to a pacemaker or other device. As these are implanted inside the
For example, a pacemaker treats bradycardia (slower heart rhythms). A pacemaker can sense, record and store information about the functioning of the device as well as any cardiac arrhythmia. A health care professional may access this information by using a device that interrogates the pacemaker ...
aIn NKX2-5-deficient mouse embryos, HCN4 was activated in the entire embryonic heart tube,whereas Connexin40 expressionwas lost, ectopic expression of pacemaker cells was observed throughout the heart tube nkx2 5deficient老鼠行动胚胎, hcn4在整个胚胎心脏管被激活了,而connexin40丢失了expression...