5. (a) (i) Name the disease caused by a lack of iron in the diet of an animal - Leaving Cert Agricultural Science - Question 5 - 2011
Question 5
5.
(a) (i) Name the disease caused by a lack of iron in the diet of an animal.
(ii) Discuss the role of iron in the blood.
(iii) Mention one way of preventing ... show full transcript
Worked Solution & Example Answer:5. (a) (i) Name the disease caused by a lack of iron in the diet of an animal - Leaving Cert Agricultural Science - Question 5 - 2011
Step 1
(i) Name the disease caused by a lack of iron in the diet of an animal.
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Answer
The disease caused by a lack of iron in the diet of an animal is known as Anaemia.
Step 2
(ii) Discuss the role of iron in the blood.
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Iron plays a crucial role in the blood primarily as a part of the haemoglobin molecule, which is essential for transporting oxygen throughout the body. The iron component of haemoglobin binds to oxygen when the blood passes through the lungs, allowing for efficient oxygen delivery to tissues. This process is vital for maintaining cellular metabolism and overall energy production.
Step 3
(iii) Mention one way of preventing iron deficiency in livestock.
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One effective way of preventing iron deficiency in livestock is to ensure a balanced diet that includes sources rich in iron, such as iron-rich feed or allowing access to natural forage that provides adequate minerals. Additionally, regular iron injections can be administered to young animals, especially in breeding operations.
Step 4
(i) Name the parts labelled A, B, C, D.
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The parts labelled in the dissected mammalian heart are:
A = septum
B = right ventricle
C = bicuspid valve
D = vena cava.
Step 5
(ii) State the destination of the blood flowing
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in X: The blood in X flows towards the lungs for oxygenation.
in Y: The blood in Y returns to the left atrium from the lungs.
Step 6
(iii) State the key characteristic of the blood
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in X: The blood in X contains oxyhaemoglobin, which is bright red due to the presence of oxygen.
in Y: The blood in Y is deoxygenated and appears darker red due to the absence of oxygen.
Step 7
(c) Explain the reason for the red colour of the urine.
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The red colour of urine in cattle affected by red water fever is primarily due to the presence of haemoglobin. The parasite attacks red blood cells, causing them to burst (hemolysis), which releases haemoglobin into the bloodstream. This free haemoglobin is then filtered by the kidneys and excreted in the urine, resulting in a red coloration.
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