Net ecosystem exchange (NEE) is the difference between the amount of carbon dioxide (CO₂) that a particular ecosystem absorbs from the atmosphere and the amount that it releases back into the atmosphere.
NEE is closely related to two other measures of ecosystem carbon balance: gross primary productivity (GPP) and net primary productivity (NPP). GPP refers to the total amount of CO₂ that is absorbed by plants during photosynthesis, while NPP is the amount of carbon that is stored in plant biomass.
NEE is the overall measure of the balance between carbon uptake and release in an ecosystem, taking into account not only GPP and NPP but also respiration from plants, microbes, and soil.
If NEE is negative, it means that the ecosystem is absorbing more carbon than it is releasing, and is thus a carbon sink. If NEE is positive, it means that the ecosystem is releasing more carbon than it is absorbing, and is thus a carbon source.
NEE provides a comprehensive measure of the carbon balance of an ecosystem and is an important indicator of ecosystem health and resilience in the face of climate change.
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12 - 3 RNA and Protein Synthesis: Key Concept - What happens during transcription?
Transcription is a process in which the DNA basically gets converted or transcribed to form RNA.
Once the DNA has replicated its content, it has to be transcribed in order to produce an RNA transcript which can be further translated to form the final product which is the protein.
It is considered as one of the initial process in gene expression. Transcription takes place in the cell and only one strand of the DNA basically gets copied during this process. It takes place through three major steps which are the initiation, followed by the elongation and then finally the last step which is the termination.
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blood vessels are lined wth _______ to release chemicals that aid in vasodilation and vasoconstriction.
Blood vessels are lined with endothelial cells to release chemicals that aid in vasodilation and vasoconstriction.
The inner lining of blood vessels is made up of a special type of cell called an endothelial cell, and it is essential for controlling blood flow and pressure. Nitric oxide, prostacyclin, and endothelin, among other chemical messengers released by endothelial cells, can either encourage or inhibit vasodilation and vasoconstriction.
Strong vasodilators like nitric oxide and prostacyclin, for instance, work by relaxing the smooth muscle cells in blood vessel walls to increase blood flow and lower blood pressure. Contrarily, the powerful vasoconstrictor endothelin can raise blood pressure by tightening blood vessels.
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Which two regions of the skeleton grow most rapidly during childhood?
During childhood, the two regions of the skeleton that grow most rapidly are the bones of the skull and the long bones.
The skull bones grow to accommodate the rapidly expanding brain, while the long bones, such as the bones in the arms and legs, grow rapidly to accommodate the child's increasing height. As children reach adolescence, growth plates in these long bones begin to close, and growth slows down until adulthood.
According to my sources, the lower limbs plus the facial skeleton are the two skeleton sections that grow the fastest during childhood. The growth plates at the extremities of the long bones experience longitudinal growth during childhood and adolescence.
During childhood, the skull bones and long bones expand the greatest. The skull bones expand to make room for the brain, while those that are long expanded to make room for height. Growth slows during adolescence as the developing plates in the long bones close.
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which of the following statements is true concerning calcium ions?multiple choicein smooth muscle, it binds with troponin.in smooth muscle, it binds with myosin light-chain kinase.in skeletal muscle, it binds with calmodulin.in smooth muscle, it binds with calmodulin.in skeletal muscle, it binds with tropomyosin.
The true statement concerning calcium ions is that in smooth muscle, it binds with calmodulin.
Calmodulin is a calcium-binding protein that is essential for regulating smooth muscle contraction. When calcium ions bind with calmodulin, the complex activates myosin light-chain kinase, which in turn phosphorylates myosin, allowing for actin and myosin to interact and cause muscle contraction. Hence, "in smooth muscle, it binds with calmodulin" is true.
In contrast, in skeletal muscle, calcium ions bind with troponin and tropomyosin to regulate muscle contraction. Understanding the role of calcium ions in muscle contraction is important for treating conditions that affect muscle function, such as muscular dystrophy, and for developing therapies to improve muscle performance.
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CG Headaches- general ligamentous (laxity/stiffness) has been correlated to headaches
- This implies that cervical spine ___________ exercises may be indicated in CG headache pts
- Essentially, (hypermobility/hypomobility) is linked to HA's
General ligamentous has been correlated to headaches this implies that cervical spine hypermobility exercises may be indicated in CG headache patients.
General ligamentous laxity, or increased flexibility and looseness of ligaments, has been associated with hypermobility of the cervical spine, which refers to excessive mobility or movement of the neck joints beyond the normal range of motion. This increased mobility can result in instability and improper alignment of the cervical spine, which can contribute to headaches.
In individuals with hypermobility-related headaches, exercises aimed at stabilizing and strengthening the cervical spine muscles may be indicated. These exercises are typically designed to improve muscle strength and control around the neck joints, which can help to stabilize the spine and reduce excessive movement.
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true or false, using adult stem cells requires treatment with various transcription factors
The given statement, "using adult stem cells requires treatment with various transcription factors," is true because the transcription factors are required for cell proliferation, differentiation and various other processes.
Transcription factors are the proteins that regulate the expression of certain gene and decide when will the protein formation from the gene take place. The transcription factors work directly upon the DNA strand after being activated by a cascade of reactions.
Stem cells are the cell type that retain the potential for cell division. These cells maintain the lineage of cells and divide into cells out of which some retain the division property while some differentiate to perform certain functions.
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what is Lenneberg's characteristics of biologically controlled behaviors
Lenneberg's characteristics of biologically controlled behaviors are as follows:
The behavior appears at a specific age or developmental stage, which is innate and unaffected by environmental factors.The behavior is universal across all cultures and is not learned through socialization or imitation.There is a critical or sensitive period during development in which the behavior can be acquired or modified. After this period, the behavior becomes fixed and difficult to change.The behavior is resistant to change or modification through training or other learning techniques.The behavior is adaptive and serves an evolutionary purpose, providing a survival advantage to the organism.These characteristics have been observed in various behaviors, such as language acquisition, imprinting, and social behaviors in animals, and are thought to be controlled by genetic and neurological factors.
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how would you expect high winds to affect the thermoneutral zone and metabolic rate
High winds can affect the thermoneutral zone and metabolic rate in humans by shifting the thermoneutral zone towards higher temperatures and increasing the metabolic rate required to maintain body temperature.
High winds can affect the thermoneutral zone and metabolic rate in humans in several ways.
Thermoneutral zone refers to the range of ambient temperatures at which an individual does not have to expend energy to maintain their core body temperature. High winds can increase the rate of convective heat loss from the body, causing the thermoneutral zone to shift towards higher temperatures.
On the other hand, the metabolic rate refers to the amount of energy an individual's body uses to maintain basic functions such as breathing, digestion, and circulation. High winds can increase the energy expenditure required to maintain body temperature by increasing convective heat loss.
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Complete Question
How would you expect high winds to affect the thermoneutral zone and metabolic rate in humans?
what is the example he used to show what happens when you change the dna, which changes an amino acid in a protein?
To answer your question about the example used to show what happens when you change the DNA, which changes an amino acid in a protein:
The example used is a point mutation, specifically a missense mutation. In this case, a single nucleotide in the DNA sequence is changed, causing a change in the corresponding amino acid in the protein. This alteration in the amino acid sequence can potentially affect the structure and function of the protein.
1. A single nucleotide in the DNA sequence is changed (a missense mutation).
2. This change results in a different mRNA codon during transcription.
3. During translation, the altered mRNA codon specifies a different amino acid.
4. The protein's amino acid sequence is altered, potentially affecting its structure and function.
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an epithelial tissue is defined as: a collection of contractile cells. a network of cells that use chemical communication. a few cells embedded into an extensive extracellular matrix. a collection of cells that lines cavities or outside surfaces.
An epithelial tissue is defined as a collection of cells that lines cavities or outside surfaces. Epithelial tissues are one of the four main types of animal tissues, along with connective, muscular, and nervous tissues.
They cover the body's surface, line internal organs and body cavities, and form glands. Epithelial tissues are characterized by their tightly packed cells that form a continuous sheet or layer. They are typically polarized, with one surface facing the external environment or internal cavity, and the other surface facing the underlying connective tissue. Epithelial tissues have a variety of functions, including protection, absorption, secretion, and sensation.
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"67) Some plans for weight loss include eating a low-carbohydrate diet. In the absence of a lot ofglucose in the diet, what other food molecules can be used to extract energy for cellularrespiration?"a. Protein and fatsb. Proteinc. Fatsd. none of above
In the absence of a lot of glucose in the diet, the body can use protein and fats to extract energy for cellular respiration.
When the body is in a state of low carbohydrate intake, it turns to alternative sources of energy to maintain normal metabolic functions. One of the primary sources of energy in this state is fat, which is broken down into fatty acids and glycerol through a process called lipolysis. The fatty acids can then be transported to the mitochondria of cells and oxidized to generate ATP through the process of beta-oxidation.
In addition, the body can also break down protein through a process called gluconeogenesis to produce glucose, which can then be used for energy. However, this is a less efficient process than using fats, and it can lead to the breakdown of muscle tissue if protein intake is not sufficient to meet the body's needs.
Overall, while the body prefers to use glucose as its primary source of energy, it can switch to alternative sources such as fat and protein in the absence of sufficient glucose intake.
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what gland does the placenta use HCG to communicate with directly?
The placenta uses human chorionic gonadotropin (HCG) to communicate with the corpus luteum directly. The corpus luteum is a temporary endocrine gland that forms in the ovary after ovulation, it secretes hormones such as estrogen and progesterone, which are essential for maintaining the early stages of pregnancy.
HCG is produced by the placenta and serves as a signal to the corpus luteum to continue producing hormones such as estrogen and progesterone. HCG levels rise rapidly in the first few weeks of pregnancy, peaking at around 8-10 weeks and then gradually declining as the placenta takes over hormone production. HCG also plays a role in detecting pregnancy through home pregnancy tests, which measure the levels of HCG in urine. High levels of HCG are indicative of pregnancy, as the hormone is produced by the placenta only during pregnancy.
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if the peak field strength 1.3 mm from an axon is 9.0 pt , what is the peak current carried by the axon?
The relationship between the peak field strength and peak current carried by the axon is given by the cable equation.
However, without additional information, it is not possible to determine the peak current carried by the axon based solely on the peak field strength.
The cable equation includes parameters such as the diameter of the axon, its resistivity, and the distance between the field source and the axon.
These parameters need to be taken into account to solve for the peak current carried by the axon.
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what is blood pressure measured by. what exactly are they measuring? where does the largest drop in blood pressure occur?
A sphygmomanometer measures the force of blood against the walls of arteries to determine blood pressure. Arterioles, or the smallest arteries, experience the greatest decrease in blood pressure.
What is the blood pressure measurement?Millimetres of mercury (mmHg) are used to measure the amount of circulatory strain. The readings are always given two at a time, with the upper (systolic) value coming first and the lower (diastolic) value coming after.
What units are used to measure blood pressure?A circulatory strain estimation has two numbers: The top number (systolic) is the strain of the blood stream when the heart muscle crushes (contracts), siphoning blood. The pressure measured between heartbeats is represented by the lowest number, diastolic.
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