The purplish red pigment rhodopsin conta...

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of

Vitamin A

Vitamin B

Vitamin C

Vitamin D

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The purplish red pigment rhodopsin contained in the rods type of photoreceptor cell of the human eyes is a derivation of

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A list of steps involved in mechanism of vision is given below in a random order. (i)Neural impulses are analysed and image formed on retina is recognised by visual cortex. (ii)Membrane permeability changes (iii)Ganglion cells are excited (iv)Bipolar cells are depolarised (v)Action potentials (impulse) are transmitted by optic nerves to visual cortex. (vi)Potential differences are generated in the photoreceptor cells. (vii)Light energy causes a change in shape of rhodopsin, leading to the dissociation of retina (an aldehyde of vitamin A ) from opsin (a protein) (viii)Structure of opsin is changed. Which of the following options represents these events in a correct order ?

During oogenesis in human female, a primary oocyte produces four haploid cells. Out of these four haploid cells, only one is used in reproduction. Then, a. what is the fate of the haploid cell used in reproduction? b. What happens to the other three haploid cells? c. What is the significance of this type of meiotic division during oogenesis?

Consider the following statement and select the option stating which ones are true (T) and which ones are false (F) (i) Emigration is the movement of individuals out of a place or country (ii) Combined contraceptive pills contain synthetic progesterone and estrogen to check ovulation (iii) Depo-Provera are estrogen derivative injections (iv) The scientific study of human population is called demography.

SARAS PUBLICATION-HUMAN PHYSIOLOGY-EXAMPLE

Arteries are best defined as the vessels which
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