MCQ
Which ion binds with troponin during muscle contraction ?
- A$HCO_3^-$
- ✓$Ca^{+2}$
- C$Cl^-$
- D$Na^+$
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$R$ : Kidneys help in removal of metabolic wastes along with regulating the osmolarity of body fluids.
$(i)$ Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
$(ii)$ Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.
$(iii)$ Flagella are comparatively longer and responsible for cell movement.
$(iv)$ Cilium and flagellum are covered with plasma membrane. Which of the above statements are correct?