Nobody downloaded yet

Effects of steroids on calcium activated potassium channels and secretion of LH and FSH in Atlantic cod (Gadus morhua) - Essay Example

Comments (0) Cite this document
These two hormones specifically control gametogenesis and by extension development into puberty. LH and FSH are secreted by specialized hormone…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER94.5% of users find it useful
Effects of steroids on calcium activated potassium channels and secretion of LH and FSH in Atlantic cod (Gadus morhua)
Read TextPreview

Extract of sample "Effects of steroids on calcium activated potassium channels and secretion of LH and FSH in Atlantic cod (Gadus morhua)"

Download file to see previous pages The secretion of these hormones by the gonadotropes is in turn mediated by the activity of gonadotropin releasing hormone (GnRH) produced by the BPG axis (Borg, 1994). Apart from regulating gametogenesis, these hormones also control steroidogenesis, a process that produces sex steroids involved in moderating gametogenesis (Schulz and Goos, 1999). Another important regulating hormone for the gonadotropins is dopamine, which has been reported as a down regulator in several teleost fish (Borg, 1994). The releasing hormone, GnRH, once produced binds and activates its receptors found on the membrane of the hormone producing cells of the pituitary gland (Bliss, Navratil, Xie, & Roberson, 2010). Contrastingly in teleost, there is a direct innervation of the pituitary gland by GnHR neurons, whereas, in humans and other mammals, the action of GnHR is via neurochemostasis (Mousa & Mousa, 2003).
The binding of GnHR to its receptors on the gonadotropes triggers an increase in intracellular calcium ion concentration an action that stimulates the secretion of the hormones by the activated cells. The initial and immediate secretion of the hormones is by exocytosis of hormone vesicles, which is later followed by long term gene transcription to sustain prolonged secretions. The increase in calcium ion concentration is mediated by various mechanisms, such as an influx via voltage-gated channels, and release from intracellular stores. For example, action potentials tend to promote the influx of extracellular calcium ions in voltage-gated calcium ion channels expressing cells. The elevated calcium ions concentration, in the cells activates, calcium activated Potassium channels (CAPC), a pathway that plays a significant role in modulating membrane potentials and thus the electrophysiological effect on hypothalamic releasing hormones (Fettiplace & Fuchs, 1999).
CAPCs are ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Effects of steroids on calcium activated potassium channels and Essay”, n.d.)
Retrieved from
(Effects of Steroids on Calcium Activated Potassium Channels and Essay)
“Effects of Steroids on Calcium Activated Potassium Channels and Essay”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Effects of steroids on calcium activated potassium channels and secretion of LH and FSH in Atlantic cod (Gadus morhua)

Anabolic Steroids

...?Anabolic Steroids and number Introduction Anabolic steroid is a compound, a group of synthetic hormones; usually derived from testosterone, that can produce numerous physiological effects including increased protein synthesis, muscle mass, strength, appetite and bone growth, Andy and Beaker (2010). When used in excessive doses, anabolic steroid is known to cause numerous side effects, including high blood pressure, increase in low-density lipoprotein (LDL) and hepatotoxicity among others (Andy and Beaker, 2010). There is a wide apprehension that “anabolic steroid is a dangerous and deadly drug. There has been a lot of speculation as to...
5 Pages(1250 words)Research Paper

Marketing Channels

...Running Head: Marketing Channels in Grocery Distribution Marketing Channels in Grocery Distribution (School) Marketing Channels in Grocery Distribution In the food industry, distribution becomes more important than in most other industries. Some of the reasons for this are shorter life cycles for goods and an increasing need for freshness of product. Retail grocery chains are under pressure because suppliers outnumber retail distribution centers. In an effort to cut costs, both suppliers and retailers are looking into new ways of moving product. Factory Gate Pricing: What Is It A recent Dutch study (leBlanc et al 2004), revealed that retail logistics in various grocery chains are...
8 Pages(2000 words)Essay


... effects, it is not recommended. Medical science has also recommended these steroids for the treatment of the vascular manifestations of Beh'et's disease, for hereditary angioedema, to help in overcoming aplastic anemia and for the treatment of itching of chronic biliary obstruction. Cortico steroid is another et of major steroids that are a group of hormones that have a Cortisone-like action. In fact the researchers have found that these steroids can mimic the activity of cortisone. Cortisone in general has the role in regulating inflammation and help in the curing process. The synthetic corticosteroids are used in the treatment of many diseases such as asthma, eczema, allergies, arthritis, colitis and kidney disease. However... and...
10 Pages(2500 words)Research Proposal

Anabolic Steroids

...months schedule of limited quantity to overcome their problems. High dosage also helps the transsexual females to get masculinized. The regular medicine used in the treatment of Aids also has side effects. On the other hand, anabolic steroids give enhanced energy to Aids patients. It enables the patients to have improved energy level with a quality life-style. Initially, anabolic steroids were used for the treatment of muscle wasting diseases but now it is valuable to note that it remarkably help helps the patients with severe Osteoporosis. A major change is shown with the use of anabolic steroids in rapid rate of bone loss. It helps the bone to absorb maximum...
8 Pages(2000 words)Essay

Mr Cod

...economy. Legislation aims to satisfy consumer needs and expectations by making it imperative for hotels/restaurants/fast food eateries to supply wholesome, safe, enjoyable, and nutritious products at value for money. Food and Drink Federation (FDF) represents and promotes the industry's common interests by developing and implementing policies and information and education programmes on all these above key issues. Opposition to the new era of globalisation is emerging in the food system. The effect of this can be seen in the questioning of not just the products of the food system but the nature of its production and distribution in the UK. Mr Cod has maintained quality to British standards and uses the...
18 Pages(4500 words)Essay

Screening for novel peptides that block T-type calcium channels

...Calcium channels Cytoplasmic Ca2+-calmodulin complexes phosphorylate kinases of various functions. For example, phosphorylated CaM-kinases II in neurons activate catecholamine synthesis. In muscles, increased Ca2+ concentrations in the cytoplasm activate glucose production from glycogen and inhibit glycogen synthesis. Other calmodulin-mediated enzymes include phosphatases, cyclases, esterases, and ion channels. Cytoplasmic calcium ions also contribute into inducing protein and DNA synthesis, and nuclear transport, thus trapping the cells in its quiescent state of cell cycle. Effects of Ca2+ are most drastic at G1 phase of...
4 Pages(1000 words)Essay

Steroids the total blood volume and haemoglobin concentration by the use of steroids. They also contribute in enhancing vascular supply concomitant that increases the vascular bed as well as the blood volume. All of which have been proven to contribute to the athletic performance specifically in terms of endurance (Taylor, 2002). Steroids can also increase the bone mineral density along with the bone strength which contributes in the formation of a calcium and protein bone matrix. The strong and dense bones are a great plus point when it comes to contact sports. Recent studies also propose the contribution of steroids in the healing process specifically of sports related...
5 Pages(1250 words)Essay


...abuse. However, steroids are comprised of several different names for example stackers, pumpers, gym candy, weight trainers, roids, gear, Arnolds (Lau ) and the most popular one is juice (Freedman 64). In recent years steroids are being used in the treatment of many diseases like asthma, lack of proper growth, cancer, osteoporosis and other skin related disease (Freedman 64). What are steroids? They are defined as a “class of lipids having a particular molecular ring structure called the cyclopentanoperhydro-phenanthrene ring system. Steroids differ from one another in the structure of various side chains and additional rings. Steroids are common in...
5 Pages(1250 words)Research Paper


...Steroids Steroids are artificial imitative testosterone hormones that simulate the development of male characteristics. Testosterone has both masculinizing and tissue-building effects and steroids are designed to bring about similar effects. There are different types of steroids and they are used for both medical and non-prescriptive purposes. The myth that steroid use is illegal and that all steroids are harmful is not true. Only non-prescriptive use of steroids is prohibited in many countries. Some people think that the mere intake of steroids builds muscles...
2 Pages(500 words)Essay


...Potassium Introduction Potassium is a crucial element in the body that is responsible for both cellular and electrical function. The blood serum contains between 3.5 and 5 mg of potassium in every 100 ml. The body potassium is derived from dietary sources, with the element well absorbed from the intestines. Excess potassium in the body is eliminated through urine while others are still eliminated via sweating. Adrenal hormone is responsible for the stimulation actions for elimination of potassium from the body; however, coffee, sugar, alcohol and diuretics can contribute to low levels of potassium (Alderman et al., 2012). Hyperkalemia and hypokalemia Hyperkalemia is the increased serum levels of potassium in excess of 5mg/100 ml... ....
1 Pages(250 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Effects of steroids on calcium activated potassium channels and secretion of LH and FSH in Atlantic cod (Gadus morhua) for FREE!

Contact Us