The liver has a portal vein as well as a hepatic vein

 

The liver has a portal vein as well as a hepatic vein. It also has unique exchange blood vessels similar to
capillaries, called “sinusoids.” How do these unique structures determine the function of the organ?
Cirrhosis leads to scarring and increased hydrostatic pressure in the hepatic portal vein. Explain why this
increased venous pressure causes net filtration to increase in the hepatic capillaries, leading to ascites
(swollen and fluid-filled interstitial space of the abdomen).

 

Sample Solution

The liver has a portal vein as well as a hepatic vein

The liver plays a major role in metabolism and has a number of functions in the body, including glycogen storage, plasma protein synthesis, and drug detoxification. It also produces bile, which is important for digestion. The portal vein brings venous blood from the spleen, pancreas, and small intestine so that the liver can process the nutrients and byproducts of food digestion. Hepatic veins are blood vessels that return low-oxygen blood from your liver back to the heart. The veins are key players in the supply chain that moves the blood that delivers nutrients and oxygen to every cell in your body. A blockage in one of the hepatic veins may damage your liver. In the liver the blood from the portal vein flows through a network of microscopic vessels called sinusoids in which the blood is relieved of worn-out red cells, bacteria, and other debris.

through ‘sustained multiple crises’ that has impacted migration, rather than the single moment in the financial crash.

Sociologists have pointed to the wider problems of neoliberalism in discussion of recession (Fraser 2013; Berry 2015). Nancy Fraser (2013) has called for a new radicalised feminism to tackle the crisis. In her critique of second-wave feminism she likens the movement to the ‘handmaiden’ of neoliberal economics on three indirect contributions: through critique of the “family wage” to legitimate “flexible capitalism”; rejecting “economism” and politicising “the personal” and the critique of welfare-state paternalism. Berry has identified the role of the media in relation to neoliberalism, in allowing the dominance of these perspectives in the media in the years 2009/10, with the result that recession: ‘was defined as a problem of public rather than private debt, which necessitated sharp cuts to public spending’ (2015:15).

The changes to individual and collective behaviour during recession have been documented (Keating et al 2013; Purdam et al 2015; Layte and Landy 2017). At the level of consumerism, Keating et al (2013) study focused on changing attitudes to consumption since the Celtic Tiger years (1995-2007) and into the Irish economic collapse. The study finds emotional and behavioural strategies to cope with these changes which stand out from existent literature: new categories of resignation, and remembrance of times past standing. Purdam et al’s (2015) UK city case study on ‘food insecurity’ highlights the diversity of individuals including professionals using food banks as a ‘last resort’ since the crash and associated feelings of shame. While Layte and Landy (2017) mixed method study looks at the temporal patterns of collective protest in Ireland during recession. They found that the height of unrest actually correlated with recovery in 2014, with unrest at its lowest during 2010. They enables a critique of the direct correlation found between material deprivation and social protest and re-focus in on contingent factors. Lim and Laurence’s study (2017) found a decline in volunteering, particularly informal types, since the recession with this more acute in regions with higher unemployment or previously economically disadvantaged. Rather than directly attributed to financial hardship, weaker ‘norms of social trust’ were discovered as the cause (Lim & Laurence 2017: 10).

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