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ہوم / مشق / ایم ڈی کیٹ / حیاتیات / ہاضمہ، دورانِ خون، تنفس اور اخراج
ہاضمہ، دورانِ خون، تنفس اور اخراج
9 سوالات: ایم ڈی کیٹ حیاتیات، جوابات اور وضاحت کے ساتھ۔
جوابی کنجی کے ساتھ قابلِ پرنٹ ورک شیٹ
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Which enzyme in saliva begins the digestion of starch?
- 1 Lipase
- 2 Trypsin
- 3 Salivary amylase
- 4 Pepsin
جواب دیکھیں
درست جواب: Salivary amylase
Salivary amylase breaks starch into maltose in the mouth. Pepsin works on proteins in the stomach.
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Which chamber of the heart pumps oxygenated blood to the body?
- 1 Left ventricle
- 2 Right ventricle
- 3 Right atrium
- 4 Left atrium
جواب دیکھیں
درست جواب: Left ventricle
The left ventricle has the thickest wall and pushes blood into the aorta for the whole body.
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The functional unit of the kidney is the:
- 1 Villus
- 2 Alveolus
- 3 Neuron
- 4 Nephron
جواب دیکھیں
درست جواب: Nephron
Each kidney has about a million nephrons, which filter blood and form urine.
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Gas exchange in the lungs takes place in the:
- 1 Trachea
- 2 Pleura
- 3 Alveoli
- 4 Bronchi
جواب دیکھیں
درست جواب: Alveoli
Alveoli have very thin walls and a rich blood supply, so oxygen and carbon dioxide diffuse across them easily.
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Which vessel carries oxygenated blood from the lungs to the heart?
- 1 Pulmonary vein
- 2 Pulmonary artery
- 3 Vena cava
- 4 Aorta
جواب دیکھیں
درست جواب: Pulmonary vein
The pulmonary vein is unusual because it carries oxygenated blood. It enters the left atrium.
-
Which acid is secreted by the stomach to kill microbes and activate pepsinogen?
- 1 Sulphuric acid
- 2 Lactic acid
- 3 Nitric acid
- 4 Hydrochloric acid
جواب دیکھیں
درست جواب: Hydrochloric acid
Parietal cells secrete hydrochloric acid, which gives the stomach a pH of about 2 and converts pepsinogen into pepsin.
-
Most of the water in the glomerular filtrate is reabsorbed in the:
- 1 Loop of Henle only
- 2 Bowman's capsule
- 3 Collecting duct
- 4 Proximal convoluted tubule
جواب دیکھیں
درست جواب: Proximal convoluted tubule
About two thirds of the filtered water is reabsorbed in the proximal convoluted tubule, together with glucose and salts.
-
Which blood component is mainly responsible for clotting?
- 1 Lymphocytes
- 2 Plasma proteins only
- 3 Platelets
- 4 Red blood cells
جواب دیکھیں
درست جواب: Platelets
Platelets stick together at a wound and release factors that start the clotting cascade.
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Bile is produced by the liver and stored in the:
- 1 Pancreas
- 2 Gall bladder
- 3 Duodenum
- 4 Spleen
جواب دیکھیں
درست جواب: Gall bladder
The gall bladder stores and concentrates bile, then releases it into the duodenum to emulsify fats.