MCQ
'Exophthalmic goitre' $(Grave's\,\, disease)$ is caused due to
- AHypofunction of the thyroid
- ✓Hyperfunction of the thyroid
- CHypofunction of the parathyroid
- DHyperfunction of the parathyroid
✓
Answer
Correct option: B.
Hyperfunction of the thyroid
b
(b) Exophthalmic goitre $(Grave’s\,\,disease)$ is hyperthyroidism.
(b) Exophthalmic goitre $(Grave’s\,\,disease)$ is hyperthyroidism.
Eye balls protrude due to accumulation of mucus in eye orbits metabolic rate is abnormally high.
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(ii) Nereis possess lateral appendages, parapodia that help in swimming.
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(iv) Neural system of annelids consists of paired ganglia connected by lateral nerves to a single ventral nerve cord.
(v) Arthropods is the largest phylum of Animalia and over 2/3rd of all named species on earth are member of this phylum.
(vi) The body of arthropods is covered by chitinous exoskeleton.
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(xiii) The mouth contains a file-like rasping organ for feeding, called radula in echinodermata.
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(xvi) Digestive system is complete in echinodermata with mouth on the dorsal side and anus on ventral side of body.
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choose the option with all correct statements :-
(i) Annelids possess longitudinal and circular muscles which helps in osmoregulation.
(ii) Nereis possess lateral appendages, parapodia that help in swimming.
(iii) Nephridia helps in osmoregulation and excretion in annelids.
(iv) Neural system of annelids consists of paired ganglia connected by lateral nerves to a single ventral nerve cord.
(v) Arthropods is the largest phylum of Animalia and over 2/3rd of all named species on earth are member of this phylum.
(vi) The body of arthropods is covered by chitinous exoskeleton.
(vii) Statocysts are present as balance organs in arthropods.
(viii) Excretion takes place in arthropods through malpighian tubules.
(ix) Fertilisation is external in arthropods.
(x) In phylum arthropod, locusta member is gregarious pest and limulus is a living fossil.
(xi) Mollusca is the second largest animal phylum. The body of member of this phylum is covered by calcareous shell.
(xii) In mollusca, a soft and spongy layer of skin forms mantle over the visceral hump. The space between hump and the mantle is called mantle cavity.
(xiii) The mouth contains a file-like rasping organ for feeding, called radula in echinodermata.
(xiv) Pinctada is commonly known as pearl oyster and pila as apple snail.
(xv) Sepia is commonly known as cuttlefish and octopus as devil fish.
(xvi) Digestive system is complete in echinodermata with mouth on the dorsal side and anus on ventral side of body.
(xvii)The most distinctive feature of sponges is the presence of water vascular system.
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