相关实验视频
Updated: Jul 29, 2026

11:01
Monitoring Plant Hormones During Stress Responses
Published on: June 15, 2009
概括
压力会触发适应性荷尔蒙反应,包括甲基荷兰胺和皮质类固醇. 葡萄糖皮质激素和皮质激素释放因子等激素之间的复杂相互作用调节这些生理应激反应.
科学领域:
- 内分泌学和生理学的内分泌学和生理学.
- 神经内分泌学神经内分泌学
背景情况:
- 压力引起显著的荷尔蒙适应.
- 涉及的关键激素包括甲基荷兰胺,皮质类固醇和上腺皮质激素.
研究的目的:
- 阐明控制压力诱导的荷尔蒙反应的复杂调节相互作用.
- 了解各种激素在生理适应压力因素中的相互作用.
主要方法:
- 对荷尔蒙信号通路的审查.
- 分析神经内分泌系统中的调节反循环.
主要成果:
- 葡萄糖皮质类药物会影响上腺髓中 катехолами因的产生.
- 甲基荷兰胺刺激前垂体从前垂体释放上腺皮质otropin.
- 皮质前皮质激素释放因子,血管活性肠道和阿尔金氨酸压缩素刺激,而皮质类固醇和体静止素抑制 adrenocorticotropin 的分泌.
结论:
- 一个复杂的荷尔蒙相互作用网络调节了对压力的生理反应.
- 这些相互作用对于适应各种生理压力因素至关重要.
相关概念视频
Hormonal Regulation
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
Blood Pressure
Blood pressure (BP) is the pressure or force of blood exerted on the artery's walls as it circulates through the body. It is essential for maintaining blood flow throughout the body.
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the diastolic...
Blood Pressure
The movement of blood in a human body, commonly referred to as blood flow, is determined by the volume of blood that traverses a certain section of the bodily system per unit time. It is the rhythmic contraction of the heart's ventricles that primarily instigates this movement. As the ventricles contract, blood is forced into the prominent arteries, which then flow from areas of greater pressure to lower pressure areas. This movement continues into smaller arteries and arterioles and...
Hormonal Regulation of Blood Pressure
Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction while...
Major Hormones and Their Functions
Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Physiological Foundation of Stress
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...

