17. Phototransduction in retinal rod cells in response to light is triggered by which of the following events? A) Activation of CAMP OB) Capture of photons by opsin C) Depolarization of photoreceptors D) Increase in concentration of cGMP E) Influx of Ca2+ into rods

As has been done since the beginning of time, removing the lens of the eye for the purpose of cataract surgery, why would you anticipate a spectacle lens of about 16 D to be prescribed?

Ms. Brundage buys a fancy new plant, and brings it home to replace her plastic ones. The action spectrum of the plant's leaves is found in Figure 1 below. Unfortunately it is winter and there is very little natural light. The local hardware store offers her two lighting choices: halogen light or cool white LED. After a little research, she discovers the spectrum of each type of light, as shown in Figure 2. a) Which type of light should Ms. Brundage purchase? Explain. b)The salesperson assures her that her plant most likely will be able to grow under either type of light. Given what you know about plant pigments and photosynthesis, how could this be possible? Explain.

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

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

Based on the same attached figure as above (Figure 10.9 in your textbook), what kind of channel permits K+ to pass through the apical-end membrane in hair cells of the ear? (A) Spiral ganglion Tectorial membrane Scala vestibuli Inner hair cells -45 mV Scala tympani Outer hair cells Scala media Organ of Corti Perilymph Low K+ 0mV Endolymph High K+ +80 mV (B) Stria vascularis Basilar membrane Ca²+ Afferent. nerve Depolarization O Nucleus wwww. 00 -Depolarization. Vesicles -Transmitter To brain C₂24

1) When a hair cell is activated by a sound wave ____. A) it fires action potentials that cause the basilar membrane to begin to vibrate B) it releases neurotransmitter C) its kinocilia and stereocilia release chemicals 2) Low pitch sounds are heard when the ______. A) longer more flexible fibers in the basilar membrane vibrate B) region of the basilar membrane closest to the oval window vibrates C) entire basilar membrane vibrates equally but at a low frequency

The current pandemic COVID-19 (coronavirus disease 2019) is caused by 2019-nCoV (2019 novel coronavirus). You just learned about the transmission rate hypothesis for the evolution of pathogen virulence and the power of natural selection. Which of the following statements may go through your mind?   - For individuals infected with a more virulent viral strain, each cough is likely to contain more virus particles when compared to individuals who are infected with a less virulent strain. Therefore, uninfected individuals will have a higher chance of being infected when encountering the droplets from individuals infected with a more virulent strain.   - However, individuals infected with a more virulent viral strain is likely to get sick sooner and show severer symptoms, thus will have less time being out and about when compared to individuals infected with a less virulent viral strain.   - If there is no public health measures on social distancing to prevent congregation,…

Which family of guidance proteins contains both diffusible and contact guidance molecules? a) CAMS b) Ephrins c) Integrins d) Semaphorins

86 Which of the following is in contact with perilymph and is critical to the ability to discriminate between sounds with different frequencies? A) Basilar membrane B) Hair cell C) Outer phalangeal cell D) Outer pillar cell