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IKE/TICA/HW Mod 3. Questions and answers. 100% verified. Rated A. 2023/2024

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IKE/TICA/HW Mod 3. Questions and answers. 100% verified. Rated A. 2023/2024 A drug which blocks voltage-gated sodium channels in axons would most likely: - ✔✔Prevent the depolarization phase ... of the action potential The transduction of sound waves into action potentials occurs: - ✔✔when hair cells are bent against the tectorial membrane The perceived pitch of a sound depends on - ✔✔Which region of the basilar membrane vibrates How are different colors detected in the vertebrate eye? - ✔✔-Each wavelength (color) stimulates a different type of opsin -Each photoreceptor cell expresses only one type of opsin How could you modify an animal so it could perceive additional shades of color between blue and green? - ✔✔Add photo receptor cells containing different opsins that respond to different wavelengths between blue and green In the complete absence of light, a rod will - ✔✔become strongly depolarized and increase its release of neurotransmitters Each taste bud is comprised of multiple chemoreceptor cells, each synapsed with a sensory neuron. How is information about different tastes (sweet, salty, etc) transmitted to the CNS? - ✔✔Each taste cell in a taste bud is specific to one tastant because it has one specific type of chemoreceptor. When a signalling molecule binds to a receptor at the cell membrane, it gets transduced. What is meant by the term "signal transduction"? - ✔✔The signal is transmitted inside the cell in another form. How is the signal from a steroid hormone amplified? - ✔✔The steroid hormone repeatedly activates transcription of target genes Each mRNA copy of a steroid-hormone target gene can be translated into protein multiple times A drug that that disrupts (prevents) bacterial quorum sensing (select all that apply): - ✔✔Would be useful as an antibiotic Would prevent biofilm formation Would prevent bacterial virulence Which of the following is/are TRUE of mechanoreceptors? - ✔✔mechanoreceptors respond to physical deformation of the cell plasma membrane mechanoreceptors are involved in the sensation of hearing mechanoreceptors are involved in the sensation of touch What does the hormone leptin do? - ✔✔decreases food consumption by signalling "satiation" What would happen if you surgically removed the prothoracic gland of a developing insect larva? - ✔✔Arrested development The prothoracic gland releases ecdysone, which is the hormone signaling molting or metamorphosis. Without this, a larva is likely stuck in an early larval stage, even as juvenile hormone levels change. This ultimately likely fatal to the insect. The prothoracic gland releases ecdysone, which is the hormone signaling molting or metamorphosis. Without this, a larva is likely stuck in an early larval stage, even as juvenile hormone levels change. This ultimately likely fatal to the insect. - ✔✔Plants use phototropins to receive a blue-light signal Asymmetric auxin distribution causes differential cell elongation that causes bending What hormone(s) would mediate the response to a long-term drought? - ✔✔low auxin levels ethylene [Show More]

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