This means means that it's not as strong as a covalent bond. A hydrogen bond occurs in water when the oxygen, which is slightly more negative than the hydrogen, becomes attracted to another water molecule's hydrogen. ... On the other hand covalent bonds require the sharing of electrons between atoms.Jun 29, 2014
The t<u>unica media</u> is composed of an endothelial layer that is continuous with the endocardium of the heart.
<h3>What is tunica media?</h3>
Collagen, elastin, and smooth muscle cells make up tunica media. It is located halfway between the tunica externa and the tunica intima. The transverse arrangement of its strands and color make the middle coat (tunica medium) distinct from the inner (tunica intima). It not only supports the vessel but also alters the vessel's width to control blood pressure and flow.
Elastic fibers make up the majority of the tunica media in bigger vessels. The number of elastic fibers reduces as arteries get smaller, whereas the number of smooth muscle fibers grows. The strongest of the three layers is the tunica adventitia, which is the top layer. Elastic and collagenous fibers make up its structure.
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Some of the core reasons are:
1) Deforestation
2) Excessive use of fossil fuels
3) Unevenness of Garbage
4) Increasing Population
5) Expansion of Urban area
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The earthworm has a closed circulatory system. An earthwormcirculates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessel
Deficient Fluid Volume is the nursing diagnosis that is most likely to apply to a patient who has a dysfunction of the posterior lobe of the pituitary gland.
The posterior pituitary produces ADH; disruptions in the levels of ADH upset the body's normal fluid balance. The hormones produced by the posterior pituitary do not directly affect immune function, tissue perfusion, or body temp.
Deficient fluid volume, or hypovolemia, results from a loss of body fluid or fluid shift, causing the fluid output to surpass fluid intake. In this process (acute or chronic), the body loses fluid volume and electrolytes. The source for this condition can be gastrointestinal, renal, or even metabolic.
Symptoms:
- Expresses feeling thirsty
- Verbalizes feelings of weakness
- States feeling dizzy/lightheaded, especially when changing position
- Complains about an inability to focus
- Complains of headaches
- Describes feeling of fast heartbeat
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