MCQ
During muscle contraction. What is false ?
- ✓Diameter of fibre increases
- BSize of ‘$H$’ zone becomes smaller
- CSize of ‘$I$’ band decreases
- DSize of ‘$A$’ bands remain the same
✓
Answer
Correct option: A.
Diameter of fibre increases
a
(a) During muscle contraction, both $I$ - band and $H$ - zone progressively shorten and eventually diappear while length of $A$ - band remains constant.
(a) During muscle contraction, both $I$ - band and $H$ - zone progressively shorten and eventually diappear while length of $A$ - band remains constant.
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(i) On an average, female cockroach produce A given below. oothecac, each containing B eggs.
(ii) In cockroach, nymph grows by moulting about C times to reach adult form.
(iii) The most common species of frog found in India is D
(iv) Summer sleep is called E, whereas winter sleep is called F in animals such as frog.
(v) G protects eyes of frog in water.
(vi) In frog, hind limbs end in H digits whereas fore limbs end in I digits. The copulatory pad present on the J digit of K limb in male.
(vii) The length of intestine is reduced in frog as frogs are L organism.
(viii) During aestivation and hibernation gaseous exchange take place through M in frog.
(ix) Frog has N chambered heart containing O atria and P ventricle.
(x) The ventricle of heart in frog opens into a sac- like conus arteriosus on Q side of heart.
(xi) Frog excretes R as nitrogenous waste, thus is a S animal.
(xii) In frog there are T pair of cranial nerves arising from the brain.
(xiii) Male reproductive organs in frog are found adhered to upper part of kidney by a double fold of peritoneum called U. Vasa efferentia enter the kidney and opens into V.
(xiv) In frog W is a small, median chamber that is used to pass faecal matter, urine and sperm to the exterior.
(xv) A mature female frog can lay X ova at a time. Fertilisation is Y and development involves a larval stage called Z.
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