STD 11 - 14. Breathing and exchange in gases — NEET STD 11 Science — Question

The adult frog is

Which of the following statements wrongly represents the nature of smooth muscle?

Which of the following statement(s) is/are correct regarding compound epithelium?

Assertion: The rods contain a purplish-red protein called the rhodopsin or visual purple and it responsible for image formation.
Reason: Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin which is responsible for vision.

Which of the following characteristic features always holds true for the corresponding group of animals?

Which of the following statements are not correct for transport of oxygen ?
(i) About 97 per cent of O₂ is transported by RBCs in the blood.
(ii) Each haemoglobin molecule can carry a maximum of four molecules of O₂.
(iii) Binding of oxygen with haemoglobin is primarily related to partial pressure of O₂
(iv) Partial pressure of CO₂ hydrogen ion concentration and temperature are the other factors which can interfere with this binding.
(v) A sigmoid curve is obtained when percentage saturation of haemoglobin with O₂ is plotted against the pO₂
(vi) Every 100 ml of oxygenated blood can deliver around 5 ml of O₂ to the tissues under normal physiological conditions.

Which of the following sets of animals belong to class cyclostomata

Signals from fully developed foetus and placenta ultimately lead to parturition which requires the release of