Omega-3 Fatty Acids in Fish Oils Quiz

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Where are eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) predominantly found?

In plant-based oils

In farmed fish

In fish oils like mackerel, salmon, herring, trout, and sardines (correct)

In poultry products

What is the effect of 1 gram per day of omega-3 fatty acids on the occurrence of sudden cardiac death?

Reduces by 10%

Increases by 20%

Has no effect

Reduces by 45% (correct)

How do very long chain omega-3 fatty acids (EPA and DHA) affect blood TAG concentrations?

Increase the concentrations

Have no effect on the concentrations

Vary depending on the individual

Reduce the concentrations (correct)

What effect do all three omega-3 fatty acids have on vascular function?

Protect against cardiac arrhythmias Signup and view all the answers

What has not been sufficiently proven yet regarding the effect of omega-3 fatty acids?

Their effect on cancer Signup and view all the answers

Which fatty acids are considered essential and must be consumed in the diet?

Linoleic acid and alpha-linolenic acid Signup and view all the answers

What are the main physiological actions of eicosanoids?

Regulating blood clotting, blood pressure, and immune function Signup and view all the answers

What is the role of omega-3 fatty acids in the human body?

Required for eicosanoid synthesis and beneficial effects on the nervous system Signup and view all the answers

Which fatty acids do trans-fatty acids not fit into cell membranes in the same way as?

Cis-isomers Signup and view all the answers

What are the main sources of alpha-linolenic acid?

Linseed oil and walnut oil Signup and view all the answers

What does 'Fat free' mean according to the text?

Less than 0.5g fat/serving Signup and view all the answers

What is the purpose of adding other components to fat-free products?

To enhance the flavor lost due to lack of fat Signup and view all the answers

What is the hypothesis related to trans-fatty acids according to the text?

They increase the risk of CHD by causing inflammation Signup and view all the answers

What is the main effect of hydrogenation on fatty acids?

It raises the melting point and lengthens shelf life Signup and view all the answers

What should one be cautious about when considering 'light' products?

'Light' products may still contribute to calorie intake Signup and view all the answers

Why are Omega 3s considered a vital part of cell membranes?

To concentrate in high levels in cells of the eyes and brain Signup and view all the answers

What is the significance of the balance between Omega 3 and Omega 6 consumption?

It determines the ratio of generated eicosanoids Signup and view all the answers

What are the typical healthy ratios of Omega 6 to Omega 3 intake?

1:1 to 1:4 Signup and view all the answers

How do Omega 3 and Omega 6 fatty acids interact in the body?

They compete for the same metabolic enzyme (COX) Signup and view all the answers

What is the purpose of consuming Omega 3 and Omega 6 in a balanced proportion?

To maintain a healthy ratio of generated eicosanoids Signup and view all the answers

Which fatty acids are considered essential and can lead to deficiency if not consumed?

Eicosapentaenoic acid (EPA, 20:5) and docosahexaenoic acid (DHA, 22:6) Signup and view all the answers

Who are most commonly seen to be at risk of essential fatty acid deficiency?

Infants and children on low-fat diets Signup and view all the answers

What is the primary source of cholesterol in the body?

Endogenous production in the liver Signup and view all the answers

Which type of fatty acids have the most potent effect in increasing plasma cholesterol levels?

Long-chain saturated fatty acids like myristic acid and palmitic acid Signup and view all the answers

What is the relationship between dietary cholesterol and plasma cholesterol according to the text?

Non-linear relationship affected by types of fats consumed Signup and view all the answers