Biology · Textbook solutions

Skeleton and Movement

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. · 24 questions

Exercise

24 q

Practice · 8

Choose the correct option
Ex Q1(A) $The functional unit of striated muscle is ..............$
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Ex Q1(B) $A person slips from the staircase and breaks his ankle bone. Which bones are involved?$
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Ex Q1(C) $Muscle fatigue is due to accumulation of ........$
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Ex Q1(D) $Which one of the following is NOT antagonistic muscle pair?$
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Ex Q1(E) $Swelling of sprained foot is reduced by soaking in hot water containing a large amount of common salt,$
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Ex Q1(F) $Role of calcium in muscle contraction is ..........$
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Ex Q1(G) $Hyper-secretion of parathormone can cause which of the following disorders?$
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Ex Q1(H) $Select correct option between two nasal bones$
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Practice · 6

Answer the following questions
Ex Q2(A) $What kind of contraction occurs in your neck muscles while you are reading your class assignment?$
Ex Q2(B) $Observe the diagram and enlist importance of 'A', 'B' and 'C'.$
Ex Q2(C) $Raju intends to train biceps; while exercising using dumbbells, which joints should remain stationary and which should move?$
Ex Q2(D) $In a road accident, Moses fractured his leg. One of the passers by, tied a wodden plank to the fractured leg while Moses was rushed to the hospital Was this essential? Why?$
Ex Q2(E) $Sprain is more painful than fracture. Why?$
Ex Q2(F) $Why a red muscle can work for a prolonged period whereas white muscle fibre suffers from fatigue after a shorter work? (Refer to chapter animal tissues.)$

Practice · 5

Answer the following questions in detail
Ex Q3(A) $How is the structure of sarcomere suitable for the contractility of the muscle? Explain its function according to sliding filament theory. (Refer to chapter animal tissues.)$
Ex Q3(B) $Ragini, a 50 year old office goer, suffered hair-line cracks in her right and left foot in short intervals of time. She was worried about minor jerks leading to hair line cracks in bones. Doctor explained to her why it must be happening and prescribed medicines. What must be the cause of Ragini's problem? Why has it occurred? What precautions she should have taken earlier? What care she should take in future?$
Ex Q3(C) $How does structure of actin and myosin help muscle contraction?$
Ex Q3(D) $Justify the structure of atlas and axis vertebrae with respect to their position and function.$
Ex Q3(E) $Observe the blood report given below and diagnose the possible disorder. Report D PERFECT PATHOLOGY Reg. No. :_______ Dr.________________________ Date:________ Patient Name :________________ Age:_____ M/F Reference: Examination of Blood Test Result Normal value Uric Acid 9.2 2.5 - 7.0 mg/l Blood Urea Nitrogen (Bun) 24 10 - 20 mg/dl$

Test	Result	Normal value
Uric Acid	9.2	2.5 - 7.0 mg/l
Blood Urea Nitrogen (Bun)	24	10 - 20 mg/dl

Practice · 3

Practice · 2