Given these structures of the conduction system of the heart
1. Bundles of His 2. AV node
3. Bundle branches
4. Purkinje fibres
5. SA node
Choose the arrangement that lists the structures in an order of an action potential passes through them.

Draw diagram of conducting system of human heart. Label SA node and bundle of His.

Following are given parts of small and large intestine. (i)Cecum (ii) Colon (iii)Jujunum (iv)Rectum (v)Duedonum (vi)Ileum Choose the arrangement that lists the structures in the order food passes through them from the small intestine to the anus.

Following are given parts of small and large intestine. (i)Cecum (ii) Colon (iii)Jujunum (iv)Rectum (v)Duedonum (vi)Ileum Choose the arrangement that lists the structures in the order food passes through them from the small intestine to the anus.

Following are given parts of small and large intestine.: (i) Cecum (ii) Colon (iii) Jejunum (iv) Rectum (v) Duodenum (vi) ileum Choose the arrangement that lists the structures in the order food passes through them from the small intestine to the anus.

Which is the correct route through which pulse making, impulse travels in the heart? (A) SA node - - - - AV node - - - Bundle of His - - - - Purkinje fibres (B) AV node - - - Bundle of His - - - - SA node - - - Purkinje fibres - - - heart muscles (C) AV node - - - SA node - - - Purkinje fibres - - - Bundle of His - - - heart muscles (D) SA node - - - Purkinje fibres - - - Bundle of His - - - AV node - - - heart muscles.

Given below are the stages in the generation of optic nerve impulse or action potential on the retina and the role of opsin and retinal in the mechanism of vision. Arrange them in a sequential order. a) Action potential (impulses) are transmitted by the optic nerves to the visual cortex area of the brain. b) Light induces dissociation of retinal from opsin. c) Generates action potential in the ganglion cells through bipolar cells. d) Structural changes in the opsin which induce membrane permeability changes. e) Potential differences are generated in the photoreceptor cells. f) Neural impulses are analyzed by visual cortex area of the brain.

Which sequence of events best represents the conduction of an impulse through the heart? (i) Sinoatrial node (ii) Atrioventricular node (iii) Purkinje fibres (iv) Bundle of His