Answer:
Respiratory and circulatory
Explanation:
The Circulatory System Works in Tandem with the Respiratory System. The circulatory and respiratory systems work together to sustain the body with oxygen and to remove carbon dioxide. Pulmonary circulation facilitates the process of external respiration: Deoxygenated blood flows into the lungs.
Digestive System Organs And Its Functions
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- Mouth - digestion starts when taking a bite of any food, by chewing it allows the food to be broken down causing digestion to be easier.
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- Esophagus - is located in your throat near the trachea, it reiceve the food from your mouth when you swallow
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- Stomach - holds the food while its being mixed with enzymes that allows the food process to be broken down in a usable form.
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- Small Intestine - its made of three segements; the duodenum, jejunum, and ileum. It <span>that breaks down food using enzymes released by the pancreas and bile from the liver.
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- Pancrease - first segment of the small intestion that allows enzymes to break down proteins, fats and carbohydrates. Also produces isulin.
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- Liver - is to procees nutrients, to digest fats, to <span>detoxifies potentially harmful chemicals
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- gallonbladder - stores <span>concentrates bile, and then releases it into the duodenum
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- Collon- is <span>for processing waste so that emptying the bowels is easy and convenient.
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- Rectum - <span> to receive stool from the colon,
______________________________________________________________ - Anus - </span><span>stops stool from coming out when it is not supposed to.
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sorry for the lack of explanation. this too much work for me</span>
Answer:
A scheme of recombinational repair in E. coli. RecFOR activities license RecA polymerization of daughter-strand gaps, whereas the RecBC enzyme does the same for double-strand breaks. After the RecA-catalyzed homologous strand exchange enables one-strand repair (excision repair) to fix the irregularities in the individual DNA strands, RuvABC or RecG activities remove the spent RecA filaments and Holliday junctions from the repair intermediate, freeing the participating chromosomes.
Explanation:
Enzymes of known biochemical activities are shown. The presynaptic steps result in the formation of a RecA filament. At gaps, this step requires RecJ, RecF, RecO, and RecR: the 5′ ssDNA exonuclease RecJ enlarges the ssDNA region (possibly with the help of various helicases, as no specific helicase is required for gap repair); RecF, RecO, and RecR promote RecA binding to SSB-coated DNA. At dsDNA ends, RecBCD (AddAB in B. subtilis) degrades DNA until it encounters a χ site; its helicase-nuclease activity is then modified to produce a 3′-ended ssDNA, to which it loads RecA. The synaptic step (homology search and strand exchange) is always performed by RecA and results in the formation of a Holliday junction (X structure). The postsynaptic steps are the migration and the resolution of Holliday junctions. Migration can be performed by RuvAB or by RecG, and resolution is made by RuvC (RecU in B. subtlis; RuvC forms a complex with RuvAB in E. coli). In addition, RecBCD-mediated recombination is always coupled with PriA-dependent replication restart. Antirecombinases are not shown: UvrD and MutLS prevent by different means the strand exchange reaction. In recBC mutants, the presynaptic steps of dsDNA end repair can be catalyzed by the helicase RecQ and the gap repair proteins RecJ and RecFOR, a reaction that is prevented by SbcB (and SbcCD) nucleases.
Answer:
Effects of Ecstasy on the nervous system:
- stimulant
- psychedelic
- neurotoxic
- abnormal neurotransmitter function
- injured cognitive functions (e.g., sleep and pain control)
Explanation:
Ecstasy, also known as MDMA (3,4Methylenedioxymethamphetamine), is a stimulant and psychedelic drug that may exhibit neurotoxic effects. This amphetamine analog (i.e, drug based upon the amphetamine structure) has several effects on the nervous system which are caused by the increase in the activity of three major neurotransmitters: serotonin, dopamine, and norepinephrine. It has been shown that Ecstasy alters the central nervous system, producing neurotoxic effects and affecting brain functions including, among others, cognitive functioning and development, neuroendocrine release mechanisms, sleep control, pain control, etc.
Theoretically speaking, for a scientist to determain weather an unknown substance is set out to be an element, compound, solution, or heterogenous mixture is they would have to look at the substances properties, and appearance, using this will allow the scientist to outlook what it shall be.
