Building Blocks Of The Brain
Extensive and intricate as the human brain is, and with the almost limitless variation of which it is capable, it is built from relatively few basic units. The fundamental building block of the human brain, like that of nervous systems throughout the animal kingdom, is the neuron, or nerve cell. The neuron conducts signals by means of an axon, which extends outward from the soma, or body of the cell, like a single long arm. Numerous shorter arms, the dendrites , conduct signals back to the soma.
The ability of the axon to conduct nerve impulses is greatly enhanced by the myelin sheath that surrounds it, interrupted at intervals by nodes. Myelin is a fatty substance, a natural electrical insulator, that protects the axon from interference by other nearby nerve impulses. The arrangement of nodes increases the speed of conductivity, so that an electrical impulse sent along the axon can literally jump from node to node, reaching velocities as high as 120 meters per second.
Handwriting And Reading Fluency
We also know that handwriting is connected to reading fluency. Research has demonstrated a correlation between letter-naming and letter-writing fluency, and a relationship between letter-naming fluency and successful reading development. Theres a strong connection between the hand and the neural circuitry of the brainas students learn to better write the critical features of letters, they also learn to recognize them more fluently. This recognition of letters leads to greater letter-writing fluency, which leads to greater overall reading development.
When Will The Court Appoint A Guardian And When Will It Appoint A Conservator
- It depends on the situation, and in what ways the ward is incapacitated. Every situation is different, so the court has to look at each set of facts when making its decision.
- Example where conservator is needed, but guardian is not: Ronnie H. was in a serious auto accident and had minor head injuries. After the accident, Ronnie lived in his parents’ basement, went to church, played chess, and walked around the city all on his own. He had no ability to do math, however, and had a conservator handle the insurance settlement, invest it, pay his rent, and send him a small amount of spending money each month.
- Example where guardian is needed, but conservator is not: Wanda M. had a massive stroke and was totally incapable of speech or motion. As a result, she was placed in a nursing home. Because Wanda had no assets or income beyond Social Security, she did not need a conservator to make her financial decisions, but she did need a guardian to make her medical decisions.
- Note that other states may use different terms for these roles, such as personal representative or tutor.
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After Studying This Chapter You Will Be Able To:
- Identify the contributions of the endocrine system to homeostasis
- Discuss the chemical composition of hormones and the mechanisms of hormone action
- Summarize the site of production, regulation, and effects of the hormones of the pituitary, thyroid, parathyroid, adrenal, and pineal glands
- Discuss the hormonal regulation of the reproductive system
- Explain the role of the pancreatic endocrine cells in the regulation of blood glucose
- Identify the hormones released by the heart, kidneys, and other organs with secondary endocrine functions
- Discuss several common diseases associated with endocrine system dysfunction
- Discuss the embryonic development of, and the effects of aging on, the endocrine system
You may never have thought of it this way, but when you send a text message to two friends to meet you at the dining hall at six, youre sending digital signals that will affect their behavioreven though they are some distance away. Similarly, certain cells send chemical signals to other cells in the body that influence their behavior. This long-distance intercellular communication, coordination, and control is critical for homeostasis, and it is the fundamental function of the endocrine system.
What If I Can’t Afford To Pay The Filing Fee
- The court may waive the fee if you cannot pay it.
- To get a fee waiver, you must submit an Application to Proceed Without Prepayment of Costs, Fees, or Security . You can get the proper form here and complete it on the computer. You must still file it with the court and serve it on the ward along with all the other papers in your case.
- If you receive public benefits , the court will usually grant your request to waive the filing fee. Otherwise, you will have to explain to the court why the filing fee is a financial hardship.
- When you have completed the form, you must file it with the Judge In Chambers, located in the main D.C. Superior Court building at 500 Indiana Ave., NW, Room 4220.
- If the Judge In Chambers grants your request, you will receive a copy of the judge’s order. Take the order with you to the Probate Division when you file your petition for conservatorship. You will not have to pay the filing fee.
- Remember, for a guardianship, there is no filing fee.
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Acquired And Congenital Endocrine Hypofunction
Endocrine glands may be destroyed in a variety of ways, but complete destruction is unusual. For most endocrine glands, at least 90 percent of the gland must be destroyed before major signs of hormone deficiency become apparent. There are many acquired causes of endocrine hypofunction. In the case of paired endocrine glands, such as the adrenal glands and the gonads, the removal of one of the pair is followed by a compensatory increase in the activity and the size of the remaining gland, which allows normal hormone levels to be maintained. In the case of physical trauma, including surgical trauma and severe hemorrhage within the gland, gland destruction may occur, which leads to endocrine hypofunction. Other acquired causes of endocrine hypofunction include infiltration by cancer cells or inflammatory cells accumulation of large amounts of a metal or an abnormal protein bacterial, fungal, and viral infections and damage from X-rays or radioactive elements.
The Doctor Describes My Loved Ones Paralysis Using A Letter And A Number What Does This Mean
Vertebrae are numbered and named according to where they are located in the spinal cord. Lets go back to our diagram of the spinal cord. Remember, the spine is divided into four regions: the cervical, the thoracic, the lumbar, and the sacral. Each region has a certain number of vertebrae. The cervical region has seven vertebrae, the thoracic region has 12 vertebrae, while the lumbar and sacral regions have five vertebrae each.
For the sake of noting where the injury has occurred, each spinal region has a corresponding letter. For example, the cervical region is identified by the letter C, while the thoracic region is identified by the letter T. The lumbar region is identified by the letter L, and the sacral region is identified by the letter S. The number that follows each letter indicates exactly which vertebra in the region was damaged. For example, if the survivor is said to have a C4 injury, this means that the injury occurred at the fourth vertebra in the cervical region.
Why is identifying where the injury occurred so important? Well, like we said earlier, the areas of the body affected by the spinal cord injury will be directly related to the point of injury on the spinal cord. In other words, each level of injury is associated with a certain loss of function. Generally speaking, the higher along the spinal cord the injury occurs, the more function is lost.
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Role Of Feedback Loops
The contribution of feedback loops to homeostasis will only be briefly reviewed here. Positive feedback loops are characterized by the release of additional hormone in response to an original hormone release. The release of oxytocin during childbirth is a positive feedback loop. The initial release of oxytocin begins to signal the uterine muscles to contract, which pushes the fetus toward the cervix, causing it to stretch. This, in turn, signals the pituitary gland to release more oxytocin, causing labor contractions to intensify. The release of oxytocin decreases after the birth of the child.
The more common method of hormone regulation is the negative feedback loop. Negative feedback is characterized by the inhibition of further secretion of a hormone in response to adequate levels of that hormone. This allows blood levels of the hormone to be regulated within a narrow range. An example of a negative feedback loop is the release of glucocorticoid hormones from the adrenal glands, as directed by the hypothalamus and pituitary gland. As glucocorticoid concentrations in the blood rise, the hypothalamus and pituitary gland reduce their signaling to the adrenal glands to prevent additional glucocorticoid secretion .
Negative Feedback Loop
What Do I Do After The Papers Are Served
- The person who served the papers on the ward must complete the Affidavit of Personal Service, which you can download here and complete on the computer. You must still print and file it with the court.
- The Affidavit of Service should include the date, approximate time, and location that the papers were served. It should also state that the person who delivered the papers is over 18 and not a party to the case.
- The person who delivered the papers to the ward must sign and notarize the Affidavit of Service.
- You must file the signed, notarized Affidavit of Service with the court.
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Other Causes Of Endocrine Hypofunction
Changes in biochemical environments may lead to endocrine hypofunction. A well-characterized example is the nutritional deficiency state caused by iodine deficiency. Iodine is an integral part of the thyroid hormone molecule, and it must be obtained from the diet. Hypothyroidism, a decrease in available thyroid hormone, is common in areas of the world in which iodine levels in the soil are low and therefore the foods that are produced and consumed as the mainstay of the diet in those areas contain very small amounts of iodine. Drugs may also cause endocrine hypofunction. For example, patients with bipolar disorder are often treated with lithium, a drug that blocks thyroid hormone synthesis. Excess of one hormone that leads to the deficiency of another hormone can cause endocrine hypofunction. For example, overproduction of prolactin, a pituitary hormone, results in a secondary suppression of gonadal function, leading to amenorrhea in women and impotence in men. These changes are reversed when the serum concentration of prolactin is reduced to normal.
What Is The Thalamus And What Does It Do
The thalamus is often described as a relay station. This is because almost all sensory information that proceeds to the cortex first stops in the thalamus before being sent on to its destination. The thalamus is subdivided into a number of nuclei that possess functional specializations for dealing with particular types of information. Sensory information thus travels to the thalamus and is routed to a nucleus tailored to dealing with that type of sensory data. Then, the information is sent from that nucleus to the appropriate area in the cortex where it is further processed.
For example, visual information from your retina travels to the lateral geniculate nucleus of the thalamus, which is specialized to handle visual information, before being sent on to the primary visual cortex . A similar pathway through the thalamus can be delineated for all sensory information except smell. In fact, the majority of all of the signals that pass to the cortex first pass through the thalamus.
Watch this 2-Minute Neuroscience video to learn more about the thalamus.
With this in mind, it shouldn’t be that surprising that the thalamus is involved in complex brain processes like sleep and wakefulness. It even is thought to play a crucial role in maintaining consciousness. So, far from just a relay station, the thalamus is an integral area involved in higher-order brain processing of various types.
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Cattle Identification Age Determination Marking And Segregation Of Carcasses Upon Arrival And During Slaughter/dressing Chilling Cutting And Boning Procedures
Licence holders slaughtering or cutting/deboning UTM and OTM cattle must develop and implement procedures for identifying and separating these two types of cattle from their arrival at the establishment throughout the slaughter process, and during chilling, and/or cutting/deboning operations.
2.1 Age determination, identification and marking of carcasses
Licence holders will reassess their Preventive Control Plan and to develop a Critical Control Point for age determination procedures .
The age of cattle can be established by using reliable documentation that indicates the birth date of the animal or by examining the teeth. The birth date document, rather than dentition, provides the best means for determining the age of cattle. When documentation is available it should be used as the primary means of determining the age of animals.
Licence holders must maintain records of the age and identity of slaughtered cattle. The records are to include:
- information regarding the procedures used to determine the age of animals
- if age is determined by documentation, the document is to be maintained with the records for a period of two years from the date of slaughter
Determining age by birth date documentation
The CFIA also recognizes the original copies of official birth date documents issued by registered breed associations.
Hormones Of The Zona Glomerulosa
The most superficial region of the adrenal cortex is the zona glomerulosa, which produces a group of hormones collectively referred to as mineralocorticoids because of their effect on body minerals, especially sodium and potassium. These hormones are essential for fluid and electrolyte balance.
Aldosterone is the major mineralocorticoid. It is important in the regulation of the concentration of sodium and potassium ions in urine, sweat, and saliva. For example, it is released in response to elevated blood K+, low blood Na+, low blood pressure, or low blood volume. In response, aldosterone increases the excretion of K+ and the retention of Na+, which in turn increases blood volume and blood pressure. Its secretion is prompted when CRH from the hypothalamus triggers ACTH release from the anterior pituitary.
Aldosterone is also a key component of the renin-angiotensin-aldosterone system in which specialized cells of the kidneys secrete the enzyme renin in response to low blood volume or low blood pressure. Renin then catalyzes the conversion of the blood protein angiotensinogen, produced by the liver, to the hormone angiotensin I. Angiotensin I is converted in the lungs to angiotensin II by angiotensin-converting enzyme . Angiotensin II has three major functions:
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Structures Of The Endocrine System
The endocrine system consists of cells, tissues, and organs that secrete hormones as a primary or secondary function. The endocrine gland is the major player in this system. The primary function of these ductless glands is to secrete their hormones directly into the surrounding fluid. The interstitial fluid and the blood vessels then transport the hormones throughout the body. The endocrine system includes the pituitary, thyroid, parathyroid, adrenal, and pineal glands . Some of these glands have both endocrine and non-endocrine functions. For example, the pancreas contains cells that function in digestion as well as cells that secrete the hormones insulin and glucagon, which regulate blood glucose levels. The hypothalamus, thymus, heart, kidneys, stomach, small intestine, liver, skin, female ovaries, and male testes are other organs that contain cells with endocrine function. Moreover, adipose tissue has long been known to produce hormones, and recent research has revealed that even bone tissue has endocrine functions.
Endocrine SystemFigure 1. Endocrine glands and cells are located throughout the body and play an important role in homeostasis.
Regulation Of Hormone Secretion
To prevent abnormal hormone levels and a potential disease state, hormone levels must be tightly controlled. The body maintains this control by balancing hormone production and degradation. Feedback loops govern the initiation and maintenance of most hormone secretion in response to various stimuli.
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Who Does The Court Appoint As A Guardian Or Conservator
- The court’s first choice is a close family member, usually a spouse or domestic partner, parent, or adult child.
- If no close family member is available or suitable, the court will consider other relatives or friends.
- If no family member or friend is available, the court will usually appoint a neutral, specially trained attorney who handles these matters on a regular basis.
Collection Segregation And Staining Of Srm
7.1 Specified Risk Materials
Licence holders involved in the slaughter of cattle and/or the cutting/boning of bovine carcasses/quarters shall collect and dispose of the following materials as SRM.
SRM removed from cattle carcasses
This includes SRM tissues removed from cattle carcasses during slaughter, dressing or cutting/ deboning operations .
Animals condemned at ante mortem, post mortem, deadstock and bovine fetuses
The licence holder ensures the following controls are in place:
The licence holder ensures that the following controls are in place for management of floor waste:
The licence holder ensures that the following controls are in place for management of wastewater materials:
7.2 SRM containers
Contaminants, such as hydraulic fluids, heavy metals and other chemicals, must not be discarded into SRM containers since tallow extracted from rendered SRM is used in animal feeds, cosmetics, soap, etc. The inclusion of such contaminants may pose animal and public health risks.
7.3 Segregation and staining of SRM
The licence holder develops, implements and maintains control programs with the following measures:
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