Understanding the Human Body System — DU B. Sc. (Hons) Biomedical Previous Year Question Papers

(vii) Stoppage of bleeding (vili) Specialized junction between a neuron and neuron/ muscle (ix) Surgical cutting or sealing of part of each vas deferens as a means of sterilization (x) Serous membrane of the abdominal cavity 5. (a) Discuss the sliding filament theory of muscle contraction. What is the role of ATP in the process? (b) Give the location and function of 10 (i) Myenteric plexus (11) Broca's area (iii) Pyloric sphincter (v) Type II alveolar cells 6. (a) Describe the mechanism of salt and water reabsorption in the proximal tubule. How ADH helps the body conserve water? (b) Draw a well labelled diagram of 9 (i) Oxy-Haemoglobin dissociation curve (ii) Conduction system of heart (iii) Coronal section of Kidney Human Body Systems Group (B.Sc. (H) Bio-medical Sciences) (c) Attempt five questions in all. (d) Subparts of the questions should be attempted together. (e) Draw illustrations or diagrams wherever necessary. 1. (a) Define (any 4) : 2×4=8 (i) Residual volume (iii) Aphasia (iv) Obligatory water loss (b) Differentiate between 3×4=12 (i) Spatial and temporal summation (ii) Coronal and sagittal plane (iii) Endocrine and paracrine (iv) Neutrophil and lymphocyte (c) State true or false and justify (any 4) (i) Skin colour depends on the number of melanocytes. (ii) Conduction is faster in myelinated neurons than unmyelinated neurons. (iii) Insulin and glucagon hormone actions are antagonistic in nature. (iv) Strength of ventricular contraction is directly proportional to end diastolic volume. (v) Platelets do not stick to the endothelium in a normal blood flow. 2. Write short notes on : (a) Functions of Liver (b) Cells of the epidermis (c) Extrinsic clotting pathway 5 3. (a) Describe the structure of cerebrum and explain its functions. 5 (b) Discuss the general features of connective tissue with examples. 5 (c) Discuss the process of spermatogenesis. 5 4. (a) Distinguish between the anterior and posterior pituitary, and identify the hormones secreted by each part. 5 (b) Give one word for 10 (i) Maintenance of body's internal environment (ii) Cells that secrete HCl in gastric lumen (iii) Cardiac rate less than 60 beats per minute (iv) Supporting cells which form myelin sheath around axons of the CNS (v) Volume of gas inspired or expired in an unforced respiratory cycle (vi) Valve present between left atrium and left ventricle