Match each of the following substances with its mode of transportation in proximal tubular reabsorption.(a) Na+ – 1. indirect active transport (b) Glucose – 2. endocytosis (c) Urea – 3. paracellular movement (d) Plasma – 4. facilitated diffusion (e) Water – 5. primary active transport Answer

Consider the following statements each with one or two balnks. (i) The bile duct and the pancreatic duct open together into the duodenum as the (1) which is guarded by a sphincter called the (2) (ii) (3) is a proteolytic enzyme found in gastric juice of infants which hleps in the digestion of milk proteins. (iii) Fatty acids and glycerol being insoluble, cannot be absorbed into the blood. They are first incorporated into small droplets called (4) which move into the intestinal mucose. They are re-formed into very small protein coated fat globules called the (5) which are transported into the lymph vessels (lacteals ) in the villi. Which of the folllowing options gives the correct fill ups for the respective blanks in the above statements?

Which of the following functions of time represent (a) simple harmonic, (b) periodic but not simple harmonic, and (c) non-periodic motion? Give period for each case of periodic motion ( omega is any positive constant): (a) sinomegat-cosomegat (b) sin^(3)omegat (c) 3cos(pi//4-2omegat) (d) cosomegat+cos3omegat+cos5omegat (e) exp(-omega^(2)t^(2)) (f) 1+omegat+omega^(2)t^(2)

Select the correct biological term. Lymphocytes, red cells, leucocytes, plasma, erythrocytes, whitc cells, hacmoglobin, phagocyte, platelets, blood clot. (a) Disc shaped cells which are concave on both sides. (b) Most of these liave a large, bilobed nucleus. (c) Enable red cells to transport blood. (d) The liquid part of the blood. (e) Most of them move and change shape like an amocba. (f) Consists of water and important dissolved substances, (g) Destroyed in the liver and spleen after circulating in the blood for four months. (h) The substances which gives red cells their colour. (i) Another name for red blood cells. (j) Blood that has been changed 10 a jelly. (k). A word that means cell eater, (l) Cells without nucleus. (m) White cells made in the lymphatic tissue. (n) Blocks wound and prevent excessive bleeding. (o) Fragment of cells which are made in the bone marrow. (p) Another name for white blood cells. (q) Slowly releases oxygen to blood cells. (r) Their function is to help blood clot in wounds.

The transverse displacement of a string (clamped at its both ends) is given by y(x, t) = 0.06 sin ((2 pi)/(3) x) cos (120 pi t) where x and y are in m and t in s. The length of the string is 1.5 m and its mass is 3.0 xx 10^(-2) kg . Answer the following : (a) Does the function represent a travelling wave or a stationary wave? (b) Interpret the wave as a superposition of two waves travelling in opposite directions. What is the wavelength, frequency , and speed of each wave ? (c ) Determine the tension in the string.

Answer the following questions . a. The earth's magnetic field varies from point is space. Does it also change with time ? It so , on what time scate does it change appreciably ? b. The earth's core is known to contain iron. Yet geologists do not regard this as a source of the earth's magnetism why ? c. The charged currents in the outer conducting regions of the earth's core are thought to be responsible for earth's magnetism . What might be the ' battery ' (i.e., the source of energy) to sustain these currents ? d. The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past ? e. The earth's field departs from its dipole substantially at large distances (greater than about 30,000 km) what agencies may be responsible for this distortion ? f. Interstellar space has an extremely weak magnetic field of the order of 10^(-12) T, Can such a weak field be of any significant consequence ? Explain. [Note : Exercise 2 is meant mainly to arouse your curiosity . Answers to some question above are tentative or unknown . Brief answers wherever possible are given at the end . For details , you should consult a good text on geomagnetism.]

Consider the following statement each with one or two blanks. (i). The ascending limb of loop of Henle is impermeable to (1).____but allows transport of (2)._____ (ii). (3)._____and (4)._____play a significant role is producing a concentrated urine. (iii). A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release (5)._____ Which one of the following options correctly fills the blanks in any two of the statements?