Human Physiology
- Blood pressure in the pulmonary artery is : Answer: 3. more than that in the pulmonary vein. The pulmonary artery carries blood from the right ventricle at a pressure much higher than... 1
- Identify the correct statement on 'inhibin' : Answer: 2. Is produced by granulose cells in ovary and inhibits the secretion of FSH. Key idea: Inhibin is made by the granulosa cells of th... 1
- The amino acid Tryptophan is the precursor for the synthesis of : Answer: 1. Melatonin and Serotonin Tryptophan is the precursor of melatonin and serotonin. Thyroid hormones (thyroxine, T₃) are made from ty... 1
- Lack of relaxation between successive stimuli in sustained muscle contraction is known as : Answer: 3. Tetanus Sustained contraction caused by rapid successive stimuli, with no time to relax between them, is tetanus. Spasm: sudden i... 1
- Asthma may be attributed to : Answer: 2. allergic reaction of the mast cells in the lungs Key idea: Asthma is an allergic reaction that inflames the bronchi and bronchiol... 1
- Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other ? Answer: 4. Relaxin - Inhibin Key idea: Antagonistic hormones have opposite effects. Parathormone raises blood calcium; calcitonin lowers it.... 1
- Photosensitive compound in human eye is made up of : Answer: 2. Opsin and Retinal Key idea: The photosensitive pigment of the eye, rhodopsin (visual purple), is made of opsin (a protein) and re... 1
- Name the chronic respiratory disorder caused mainly by cigarette smoking : Answer: 1. Emphysema Key idea: Cigarette smoking mainly causes emphysema. Smoke damages the alveolar walls, so the surface area for gas exch... 1