Question
Myasthenia gravis is due to
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| List $I$ | List $II$ |
| $A$ Pterophyllum | $I$ Hag fish |
| $B$ Myxine | $II$ Saw fish |
| $C$ Pristis | $III$ ngel fish |
| $D$ Exocoetus | $IV$ Flying fish |
Choose the correct answer from the options given below :
$(i)$ Excretion is performed by malphigian tubules.
$(ii)$ They absorb nitrogenous waste products and convert them into uric acid which is excreted out through hindgut.
$(iii)$ In addition, fat body, nephrocytes and urecose glands also help in excretion.
$(i)$ These muscle fibres taper at both ends and do not show striations.
$(ii)$ The wall of internal organs such as the blood vessels, stomach and intestine contain this type of muscle tissue.
$(iii)$ They are 'involuntary' as their function cannot be directly controlled.