Endocrine Cell Signaling System

Endocrine Cell Signaling System Student’s Name Institution Endocrine Cell Signaling Introduction `Endocrine signaling is one of the forms of chemical signaling found in multicellular organisms. Other forms are paracrine, autocrine and signaling by direct contact. The distance that the signal travels through the organism to reach the target cell is the main difference between the different categories of signaling. The endocrine system uses chemical signaling as the method of communication. The hormones bind to the receptors on target cell inducing a characteristic response. The endocrine system takes care of the internal body environment, maintains homeostasis and controls reproduction. Literature Review Importance The endocrine system together with the nervous system is primarily responsible for maintaining homeostasis in the body. Endocrine signaling is slow in prompting a response in target cells, though the exact time varies with different hormones and their effects last longer. For example, epinephrine and norepinephrine trigger a fight-or-flight response within seconds while it may take up to 48 hours for certain reproductive hormones to prompt a response in target cells (Hancock, 2017). The endocrine signaling is may not be specific where the same hormone may prompt different responses from different target cells resulting in a variety of physiological processes. For example, oxytocin promotes uterine contractions in women in labor, plays a role in breastfeeding and may contribute to sexual response and emotional attachment in both male and female. Generally, the endocrine system takes care of the internal body environment, maintains homeostasis and controls reproduction. How it works In endocrine signaling, endocrine cells synthesize the messenger hormone which is then exported through exocytosis into the extracellular medium such as the blood or lymphatic fluid in animals (Hancock, 2017). The circulatory system distributes the hormone throughout the entire body to reach the remote regions of an organism. Because of this form of transport, hormones get diluted and reach the target cells at low concentrations. To compensate for their slow speed, hormones are more stable and capable of signaling over long times. Only the cells that contain the appropriate receptor for the hormone will elicit a hormonal response. A biochemical reaction results from the communication between the signaling and receiving organ. The nature and extent of the reaction depend on many individual reactions participating either directly or indirectly in signal transduction. The following factors contribute in hormonal signal transduction in higher organisms: biosynthesis of the hormone, degradation, and modification of the hormone, storage, and secretion of the hormone, transport of the hormone to the target cell, and the reception of the signal by the hormone receptor. Above steps are regulated in one way or another and their precise control is the basis of all physiological and metabolic processes in the body. How it is regulated Feedback regulation is the mechanism that mostly controls hormone and receptor concentrations. Positive and/or negative feedback loops adjust the intercellular communication of the whole organism. The operation of the feedback controls is mainly at the level of the enzymes involved in hormone storage or degradation, biosynthesis, and through the amount of receptor available for conversion of the extracellular signal into an intracellular response (Melmed et al., 2015). Often to achieve a fine-tuning of the intercellular communication, intertwined feedback loops are used. While some target gland such as the adrenal glands is under distance feedback regulation by the hypothalamic-pituitary-target gland axis, other hormonal systems are under direct feedback mechanisms. Another mechanism of hormonal regulation is the metabolism of hormones after their secretion which may result in an increase or decrease in hormone activity. Outcomes Hormonal secretion is a tightly controlled process and varies throughout a person’s life. Different hormones can have effects on growth, sexual development and libido, and menstruation. The endocrine system plays a role in regulating mood, tissue function, metabolism, growth and development, sexual function and reproductive processes. Factors such as infection, stress, and changes in the balance of fluid and minerals in the body influence the hormone levels. Hormonal imbalances cause many diseases and illnesses. Implications Understanding the endocrine signaling pathway has an implication in the clinical and the real world. For example, the health of both children and adults is profoundly affected by disrupted or aberrant endocrine signaling. G-protein coupled receptors and receptor tyrosine kinase mediate endocrine signaling pathways involved in critical child development and health. Gender-specific differences in glucocorticoid signaling have implications for gender-specific treatment of inflammato...