ہاضمہ، دورانِ خون، تنفس اور اخراج

Written by Dr. Hira Salman (Biology)

ایم ڈی کیٹ · حیاتیات · 9 سوالات

نام: ____________________ تاریخ: ____________

Which enzyme in saliva begins the digestion of starch?
- A Lipase
- B Trypsin
- C Salivary amylase
- D Pepsin
Which chamber of the heart pumps oxygenated blood to the body?
- A Left ventricle
- B Right ventricle
- C Right atrium
- D Left atrium
The functional unit of the kidney is the:
- A Villus
- B Alveolus
- C Neuron
- D Nephron
Gas exchange in the lungs takes place in the:
- A Trachea
- B Pleura
- C Alveoli
- D Bronchi
Which vessel carries oxygenated blood from the lungs to the heart?
- A Pulmonary vein
- B Pulmonary artery
- C Vena cava
- D Aorta
Which acid is secreted by the stomach to kill microbes and activate pepsinogen?
- A Sulphuric acid
- B Lactic acid
- C Nitric acid
- D Hydrochloric acid
Most of the water in the glomerular filtrate is reabsorbed in the:
- A Loop of Henle only
- B Bowman's capsule
- C Collecting duct
- D Proximal convoluted tubule
Which blood component is mainly responsible for clotting?
- A Lymphocytes
- B Plasma proteins only
- C Platelets
- D Red blood cells
Bile is produced by the liver and stored in the:
- A Pancreas
- B Gall bladder
- C Duodenum
- D Spleen

جوابی کلید

1. C, 2. A, 3. D, 4. C, 5. A, 6. D, 7. D, 8. C, 9. B

Salivary amylase breaks starch into maltose in the mouth. Pepsin works on proteins in the stomach.
The left ventricle has the thickest wall and pushes blood into the aorta for the whole body.
Each kidney has about a million nephrons, which filter blood and form urine.
Alveoli have very thin walls and a rich blood supply, so oxygen and carbon dioxide diffuse across them easily.
The pulmonary vein is unusual because it carries oxygenated blood. It enters the left atrium.
Parietal cells secrete hydrochloric acid, which gives the stomach a pH of about 2 and converts pepsinogen into pepsin.
About two thirds of the filtered water is reabsorbed in the proximal convoluted tubule, together with glucose and salts.
Platelets stick together at a wound and release factors that start the clotting cascade.
The gall bladder stores and concentrates bile, then releases it into the duodenum to emulsify fats.