The order in which light reaches the lens of a human eye is: A. pupil-cornea-aqu
ID: 85616 • Letter: T
Question
The order in which light reaches the lens of a human eye is: A. pupil-cornea-aqueous humor-lens B. lens-aqueous humor-pupil, cornea C. cornea-aqueous humor-pupil-lens cornea D. cornea-pupil aqueous humor-lens E. cornea-vitreous humor-pupil-lens whether molecule can cross the plasma membrane depends upon: A. the size of the molecule B. the shape of the molecule C. the chemical properties of the molecule D. the charge of the molecule E. all of the above If a cell is placed in a hypotonic solution, which will occur? A. Salts will move into the cell from the surrounding solution B. Water will move into the cell from the surrounding solution C. Salts will move out of the cell into the surrounding solution D. Water will move out of the cell into the surrounding solution E. None of the choices will occur An atom's atomic number is best described as: A. the number of protons it contains B. the number of neutrons it contains C. the number of electrons in the outermost shell D. all of the above E. only A and B Why do plants appear to be green? A. they absorb only green wavelengths of light B. they absorb only red and blue lengths of light C. they reflect nearly all wavelengths of light D. they reflect green lengths of light E. they reflect red and blue wavelengths of light What kind of receptors are involved in hearing: A. chemoreceptor's B. photoreceptors C. nociceptors D. mechanoreceptors E. both A and C which of the following is part of the adaptive or specific defenses of the body? A. sebaceous glands of the skin B. antibody production C. cilia of the respiratory tract D. inflammation E. feverExplanation / Answer
27)D cornea-pupil-aqueous humor lens.The human eye has parts like cornea,iris and lens filled by a space called aqueous humour which transport nutrients to the cornea and to the lens and help in removing products of metabolism, so light from any source enters eye bya cornea curved protective layer and passes on to blackdot pupil and goes to iris (controls light)and enters to lens to focus light on the retina.
28 E As plasma membrane is selectively permeable its transport of molecules depends upon molar mass,electric charge, polarity of molecules such as passive transport 1.diffusion -conccetration gradient in facilialated diffusion the substrate bind to protien change the shape of the molecule enters the cell.2. active transport 3.exocytosis and endocytosisi.e movement of molecules in bulk by vesicles
29.B When a cell placed in hypotonic solution water enters into the cell from the surrounding solution .HYPOTONIC SOLUTION defined as concentration of solutes is more inside the cell than outside.
30 .A The number of protons it contains which is a atomic number symbolized byalphabet Z,Z=A-N where Z atonic number means no of protons in anucleus of atom , A (mass no)=Z+N(number of protons+ number of neutons)
31. B&D. All plants on earth are green due to universal and light trapping pigment called chlorophyll in chloroplast.This absorbs red and blue wavelength of light, green wave length of light is non absorbed and reflected.
32.D Mechanoreceptors heip in hearing the sound targeting the cental nervous sytem.MECHANORECEPTORS in the semicircular canals detect rotational equilibrium. It is a sensory receptor shows response to mechanical pressure when vibrations reached the ear
33B. Antibody production is a part of adaptive or specific defenses of the body generally by B and T cells of lymphocyctes , T cells carried the cell mediated response and Bcells produce antibodies into blood plama nad lymph calle humoral immunity.