Which of the following choices is the best emulsifying agent? (a) CH3COOH, (b) CH3CH2CH2COOH, (c) CH3(CH2)11COOH, (d) CH3(CH2)11COONa. Briefly explain your choice
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Which of the following choices is the best emulsifying agent? (a) CH3COOH, (b)
CH3CH2CH2COOH, (c) CH3(CH2)11COOH, (d) CH3(CH2)11COONa. Briefly explain your choice
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- mmol CML/mol Lysine 8 6 2 0 () Lens Proteins (0) Skin Collagen 5. 20 A m 35 40 89 60 Age (years) Landb fo 80 Based on this chart, which statement is INCORRECT? a) Lenses are accumulating damage faster than the skin b) Fraction of oxidized lysine increases with aging c) Skin is accumulating damage faster than the lenses d) Both skin and lenses are accumulating damage with aging e) There is biological variability in a rate of oxidative damage in lenses of different individualsWhich of these photoreceptor cells do not match their function? a) rods - night vision b) stavar - sharp-sighted c) drops - color vision d) No answer text provided.27. Which of the following receptors is incorrectly paired with the type of energy it transduces? A) mechanoreceptors--sound B) chemoreceptors-solute concentrations 28. "Hot" peppers taste this way because of capsaicin. It is said to taste hot because A) it excites the same brain region as other spicy foods. B) it causes pain even in small doses. C) it elicits anti-prostaglandins. D) it activates the same recepers as something heated. C) thermoreceptors-heat D) pain receptors-electricity
- 4. In the dark... A) cGMP gated channels are closed B) cGMP is high C) The photoreceptor cell is hyperpolarized D) Transducin is active E) The photoreceptor cell is firing action potentials17. Phototransduction in retinal rod cells in response to light is triggered by which of the following events? A) Activation of CAMP B) Capture of photons by opsin C) Depolarization of photoreceptors D) Increase in concentration of cGMP E) Influx of Ca²+ into rods 0.0Wesley is in a movie theater with no windows—the only light is low illumination from the emergency lights on the floor. Which photoreceptors will be most useful to Wesley as he attempts to leave the theater? A) iris B) rods C) cones D) fovea
- Why does Fe2+ not fit perfectly into the center hemoglobin's heme pocket, while Fe3+ does ift perfectly into center hemoglobin's heme pocket? A) Fe2+ has a larger effective nuclear charge than Fe3+ . B) Fe2+ is to reactive to stably fit into hemoglobin's heme pocket. C) Fe2+ had a wrinkled shirt D) Fe2+ is repelled by the heme's coordinating nitrogens E) Fe3+ is denser and has a smaller ionic radius than Fe2+During an experiment on the the cough reflex in humans, a subject inhales air containing differnt amounts of particles that will impact and adhere to mucus primarily in the trachea. Blockage of which the following afferent pathways would most likely prevent this subject's reflex to initiate a cough. A) glossopharyngeal , B)laryngeal , C) olfactory , D)trigeminal, E)vagal10) The heme group in myoglobin has a lower affinity for carbon monoxide as compared to free heme. What statement below best explains this observation? a) Myoglobin lowers the pH around the heme group. b) Myoglobin has negatively charged groups around the heme group. c) Heme is buried in the core of myoglobin making the heme inaccessible. d) Steric hindrance around the heme group caused by R groups in myoglobin. e) The iron ion of free heme is replaced with a copper ion in myoglobin.
- Ipatropium is effective for the treatment of asthma because of which of the following actions? A) Dilates the alveoli B) Relaxes the bronchial smooth muscle C) Inhibits the cuild up of fluid in the lungs D) Removes excess fluid collecting in the lungsWhat is trona injection?1) which of the following is not a function of dendrites? A) provide enormous surface area for receiving signals from other neurons b) generate nerve impulses and transmit them away from the cell body c) convey incoming messages toward the cell body d) produce short distance signals called grades potentials