Which one of the following is also known
Question: Which one of the following is also known as an antidiuretic hormone? a. Oxytocin b. Vasopressin c. Adrenaline d. Calcitonin Solution: Option (b)Vasopressin is the answer....
Read More →The condition of accumulation of urea in the blood
Question: The condition of accumulation of urea in the blood is termed as a. Renal Calculi b. Glomerulonephritis c. Uremia d. Ketonuria Solution: Option (c)Uremia is the answer....
Read More →Which one of the following statements is incorrect?
Question: Which one of the following statements is incorrect? a. The medullary zone of the kidney is divided into a few conical masses called medullary pyramids projecting into the calyces. b. Inside the kidney, the cortical region extends in between the medullary pyramids as renal pelvis. c. Glomerulus along with Bowmans capsule is called the renal corpuscle. d. Renal corpuscle, proximal convoluted tubule (PCT) and distal convoluted tubule (DCT) of the nephron are situated in the cortical regio...
Read More →Which of the following pairs is wrong?
Question: Which of the following pairs is wrong? a. Uricotelic - Birds b. Ureotelic - Insects c. Ammonotelic - Tadpole d. Ureotelic - Elephant Solution: Option (b)Ureotelic - Insects is the answer....
Read More →Which one of the following statements is incorrect?
Question: Which one of the following statements is incorrect? a. Birds and land snails are uricotelic animals. b. Mammals and frogs are ureotelic animals c. Aquatic amphibians and aquatic insects are ammonotelic animals d. Birds and reptiles are ureotelic Solution: Option (d)Birds and reptiles are ureotelic is the answer....
Read More →Different types of excretory structures and animals
Question: Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer from among those given below: Excretory structure/ organ Animals A. Protonephridia i. Prawn B. Nephridia ii. Cockroach C. Malpighian tubules iii. Earthworm D. Green gland or Antennal glands. Flatworms a. A-iv, B-iii, C-ii, D-i b. A-iii, B-i, C-iv, D-ii c. A-iii, B-iv, C-ii, D-i d. A-iii, B-i, C-ii, D-iv Solution: Option (a)A-iv, B-iii, C-ii, D-iis the answer....
Read More →The pH of human urine is approximately
Question: The pH of human urine is approximately a. 6.5 b. 7 c. 6 d. 7.5 Solution: Option (c)6 is the answer....
Read More →Which of the following is removed
Question: Which of the following is removed from our body by lungs? a. CO2only b. H2O only c. CO2and H2O d. Ammonia Solution: Option (a)CO2 only is the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int\left(\frac{x+1}{x}\right)(x+\log x)^{2} d x$ Solution: Assume $(x+\log x)=t$ $\mathrm{d}(x+\log x)=\mathrm{dt}$ $\Rightarrow\left(1+\frac{1}{\mathrm{x}}\right) \mathrm{dx}=\mathrm{dt}$ $\Rightarrow \frac{x+1}{x} d x=d t$ Substituting $\mathrm{t}$ and $\mathrm{dt}$ $\Rightarrow \int t^{2} d t$ $\Rightarrow \frac{t^{3}}{3}+c$ But $t=x+\log x$ $\Rightarrow \frac{(x+\log x)^{3}}{3}+c$...
Read More →Which of the following statements is correct?
Question: Which of the following statements is correct? a. ADH prevents the conversion of angiotensinogen in the blood to angiotensin b. Aldosterone facilitates water reabsorption c. ANF enhances sodium reabsorption d. Renin causes vasodilation Solution: Option (a)ADH prevents the conversion of angiotensinogen in the blood to angiotensinis the answer....
Read More →Filtration of the blood takes place at
Question: Filtration of the blood takes place at a. PCT b. DCT c. Collecting ducts d. Malpighian body Solution: Option (d)Malpighian bodyis the answer....
Read More →The following substances are the excretory products in animals.
Question: The following substances are the excretory products in animals. Choose the least toxic form among them? a. Urea b. Uric acid c. Ammonia d. Carbon dioxide Solution: Option (b)Uric acidis the answer....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int 2 x \sec ^{3}\left(x^{2}+3\right) \tan \left(x^{2}+3\right) d x$ Solution: $\sec ^{3}\left(x^{2}+3\right)$ can be written as $\sec ^{2}\left(x^{2}+3\right) \cdot \sec \left(x^{2}+3\right)$ Now the question becomes $\Rightarrow \int 2 \mathrm{x} \cdot \sec ^{2}\left(\mathrm{x}^{2}+3\right) \sec \left(\mathrm{x}^{2}+3\right) \tan \left(\mathrm{x}^{2}+3\right) \mathrm{dx}$ Assume $\sec \left(x^{2}+3\right)=t$ $d\left(\sec \left(x^{2}+3\right)\right)...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int x^{2} e^{x^{3}} \cos \left(e^{x^{3}}\right) d x$ Solution: Assume $e^{x^{3}}=t$ $\Rightarrow \mathrm{d}\left(\mathrm{e}^{\mathrm{x}^{3}}\right)=\mathrm{dt}$ $\Rightarrow 3 \mathrm{x}^{2} \cdot \mathrm{e}^{\mathrm{x}^{3}} \mathrm{dx}=\mathrm{dt}$ $\Rightarrow \mathrm{x}^{2} \cdot \mathrm{e}^{\mathrm{x}^{3}} \mathrm{dx}=\frac{\mathrm{dt}}{3}$ Substituting $\mathrm{t}$ and $\mathrm{dt}$ $\Rightarrow \int \frac{1}{3} \cos t . \mathrm{dt}$ $\Rightarro...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{(x+1) e^{x}}{\cos ^{2}\left(x e^{x}\right)} d x$ Solution: Assume $x e^{x}=t$ $d\left(x e^{x}\right)=d t$ $\left(e^{x}+x e^{x}\right) d x=d t$ $e^{x}(1+x) d x=d t$ Substituting $\mathrm{t}$ and $\mathrm{dt}$ $\Rightarrow \int \frac{\mathrm{dt}}{\cos ^{2} \mathrm{t}}$ $\Rightarrow \int \sec ^{2} \mathrm{t} \mathrm{dt}$ $\Rightarrow \tan t+c$ But $t=x e^{x}+1$ $\Rightarrow \tan \left(x e^{x}\right)+c$...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int x^{3} \sin \left(x^{4}+1\right) d x$ Solution: Assume $x^{4}+1=t$ $d\left(x^{4}+1\right)=d t$ $4 x^{3} d x=d t$ $x^{3} d x=\frac{d t}{4}$ Substituting $\mathrm{t}$ and $\mathrm{dt}$ $\Rightarrow \int \frac{1}{4} \sin t d t$ $\Rightarrow \frac{-1 \cos t}{4}+c$ But $t=x^{4}+1$ $\Rightarrow \frac{-1}{4} \cos \left(x^{4}+1\right)+c$...
Read More →Solve this
Question: Differentiate w.r.t $x: e^{3 x} \cos 2 x$ Solution: Let $y=e^{3 x} \cos 2 x, z=e^{3 x}$ and $w=\cos 2 x$ Formula : $\frac{\mathrm{d}\left(\mathrm{e}^{\mathrm{x}}\right)}{\mathrm{dx}}=\mathrm{e}^{\mathrm{x}}$ and $\frac{\mathrm{d}(\cos \mathrm{x})}{\mathrm{dx}}=-\sin \mathrm{x}$ According to the product rule of differentiation $d y / d x=w \times \frac{d z}{d x}+z \times \frac{d w}{d x}$ $=\left[\cos 2 x \times\left(3 \times e^{3 x}\right)\right]+\left[e^{3 x} \times(-2 \sin 2 x)\right]...
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int \frac{x \sin ^{-1} x^{2}}{\sqrt{1-x^{4}}} d x$ Solution: Assume $\sin ^{-1} x^{2}=t$ $\Rightarrow \mathrm{d}\left(\sin ^{-1} x\right)=\mathrm{dt}$ $\Rightarrow \frac{2 \mathrm{xdx}}{\sqrt{1-\mathrm{x}^{4}}}=\mathrm{dt}$ $\Rightarrow \frac{\mathrm{xdx}}{\sqrt{1-\mathrm{x}^{4}}}=\frac{\mathrm{dt}}{2}$ $\therefore$ Substituting $t$ and dt in given equation we get $\Rightarrow \int \frac{t}{2} d t$ $\Rightarrow \frac{1}{2} \int t . d t$ $\Rightarrow ...
Read More →Describe the events in the cardiac cycle.
Question: Describe the events in the cardiac cycle. Explain double circulation. Solution: 1. Atrial Systole (0.7 sec): In this event atria contracts due to the wave of contraction initiated by the SA node. The blood flow takes place in ventricles as the two valves are open. 2. Ventricle Systole (0.5 sec): After this, contraction of ventricles starts taking place due to the wave of contraction initiated by the AV node. Thus closing of the two valves occur and first heart sound is produced club. 3...
Read More →Find the value
Question: Differentiate w.r.t $x: e^{2 x} \sin 3 x$ Solution: Let $y=e^{2 x} \sin 3 x, z=e^{2 x}$ and $w=\sin 3 x$ Formula : $\frac{d\left(e^{x}\right)}{d x}=e^{x}$ and $\frac{d(\sin x)}{d x}=\cos x$ According to product rule of differentiation $\mathrm{dy} / \mathrm{dx}=\mathrm{w} \times \frac{\mathrm{dz}}{\mathrm{dx}}+\mathrm{z} \times \frac{\mathrm{dw}}{\mathrm{dx}}$ $=\left[\sin 3 x \times\left(2 \times e^{2 x}\right)\right]+\left[e^{2 x} \times 3 \cos 3 x\right]$ $=e^{2 x} \times[2 \sin 3 x...
Read More →Explain Rh-incompatibility in humans.
Question: Explain Rh-incompatibility in humans. Solution: There are many blood groups which are known mainly. There is another type of blood group known as Rh factor or Rhesus monkey factor which is an inherited factor. People who do not have Rh factor are called Rh-negative people (Rh-ve). Rh-incompatibility in humans may lead to a disorder called as Erythroblastosis foetal at the time of pregnancy if the foetus is Rh+ve and the mother is Rh-ve and if the blood from foetus enters the mothers bl...
Read More →Answer the following
Question: Answer the following a. Name the major site where RBCs are formed. b. Which part of the heart is responsible for initiating and maintaining its rhythmic activity? c. What is specific in the heart of crocodiles among reptilians? Solution: a. In the early embryonic stage, RBCs are produced in Yolk Sac In later embryonic stage RBCs are produced in Liver and Spleen In mature adults, RBCs are produced in Bone Marrow b. SA node or Sino Atrial Node is responsible for the rhythmic activity. c....
Read More →Evaluate the following integrals:
Question: Evaluate the following integrals: $\int x^{3} \sin x^{4} d x$ Solution: Assume $x^{4}=t$ $d\left(x^{4}\right)=d t$ $4 x^{3} d x=d t$ $x^{3} d x=\frac{d t}{4}$ Substituting $\mathrm{t}$ and $\mathrm{dt}$ $\Rightarrow \int \frac{1}{4} \sin t d t$ $\Rightarrow \frac{-1 \text { cost }}{4}+c$ But $t=x^{4}$ $\Rightarrow \frac{-1}{4} \cos x^{4}+c$...
Read More →Differentiate w.r.t x:
Question: Differentiate w.r.t x: $\cos (\sin \sqrt{a x+b})$ Solution: Let $y=\cos (\sin \sqrt{a x+b}), z=\sin \sqrt{a x+b}$ and $w=\sqrt{a x+b}$ Formula : $\frac{d(\cos x)}{d x}=-\sin x$ and $\frac{d(\sin x)}{d x}=\cos x$ $\frac{\mathrm{d}(\sqrt{\mathrm{ax}+\mathrm{b}})}{\mathrm{dx}}=\frac{1}{2} \times(\mathrm{ax}+\mathrm{b})^{\frac{1}{2}-1} \times \mathrm{a}$ According to the chain rule of differentiation $\mathrm{dy} / \mathrm{dx}=\frac{\mathrm{dy}}{\mathrm{dz}} \times \frac{\mathrm{dz}}{\math...
Read More →Thrombocytes are essential for the coagulation
Question: Thrombocytes are essential for the coagulation of blood. Comment. Solution: They are also known as platelets which are found in the blood. Thrombocytes are formed in the bone marrow. For example, when an injury occurs, the bleeding starts and platelets will disintegrate. They release clotting factor III known as thromboplastin. Thromboplastin in the presence of calcium ions activates prothrombokinase and leads to a series of reactions causing a blood clot....
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