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- A fixative serves to :- a. stop tissue decay. b. improve contrast. c. repair a damaged tissue. d. bind epithelial cells together. e. bind cardiac myocytes together.Please ASAP. Thank you. Imagine yourself locked in a room without any light source for 30 minutes. Then let’s imagine that someone shines a red light in the corner of the room. One should expect that the rod cells in your retina will: a. Be more sensitive to the red light after the 30 minutes of darkness as compared to earlier b. Be less sensitive to the red light after the 30 minutes of darkness as compared to earlier c. Be equally sensitive to the red light as before the 30 minutes of darkness d. Rod cells do not respond to red lightPlease ASAP Thank you. 1. What is the basis for human color vision? a. Different spectral sensitivity of the three different kinds of retinal cones b. Different spectral sensitivity of rods c. Spectral filters in the eye that separate light into its spectral components before it reaches the retina d. Processing that occurs in the neural circuits in the retina 2. Imagine yourself locked in a room without any light source for 30 minutes. Then let’s imagine that someone shines a red light in the corner of the room. One should expect that the rod cells in your retina will: a. Be more sensitive to the red light after the 30 minutes of darkness as compared to earlier b. Be less sensitive to the red light after the 30 minutes of darkness as compared to earlier c. Be equally sensitive to the red light as before the 30 minutes of darkness e. Rod cells do not respond to red light
- Vision is a complex process. The human eye has many structures that contribute to vision. Which of the following statements describing the structures involved in the process of vision is NOT correct? a. Ciliary muscles change the shape of the lens to focus both near and distant objects. b. The cornea and lens bend light to focus the image on the retina. c. The iris relaxes and contracts to protect the retina from excess light. d. Lenses move forward or backward to control the amount of light striking the retina.Visible light fits between ....... a.infrared and microwaves b.microwaves and radio waves c.xrays and U.V d.U.V and infrared.The pixels in the so-called "Retina" displays are located at a distance shorter than that between photoreceptor cells in the human eye. This distance determines a resolution of A. 100 nm B. 50 µm C. 160-300 pm D.Imm
- 5. The Figure below shows two images A and B. A B (a) Which image has better image quality and why? (b) (c) Describe how you would measure the radiographic contrast of each of these digital images. Suggest 2 ways you could change the imaging set-up or equipment in order to improve the image quality of the inferior image. Explain each of your choices. (d) Suggest 2 imaging parameters you could change in order to improve the quality of the inferior image. Explain each of your choices.Which statement below best describes whether or not there is an advantage of using iPSCs to induce repair of bodily damage within a patient over using embryonic stem cells that have been donated? a. Because the iPSCs originated from the patient and thus probably will avoid rejection by the patient’s own immune system. b. Embryonic stem cells are easier to obtain. c. There are more ethical issues involved in iPSCs. d. Only embryonic stem cells are vastly renewable.Cone pigments detect different wavelengths of light due toa. their location in the retina.b. the amount of light they absorb.c. the type of retinal they have.d. the type of opsin protein they have.e. interactions with bipolar cells.
- According to the video “The Biology of Skin Color”, why is UVB critical for humans? A. It helps our bodies break down Vitamin D, which can be toxic to our bodies. B. It helps our bodies synthesize Vitamin C, which we need in order to absorb calcium in our diet. C. UVB is not critical or useful for us. D. It helps our bodies synthesize Vitamin D, which we need in order to absorb calcium in our diet.1. Using your knowledge on personal care products, how does sunscreen lotion protect your skin from the damaging effect of ultraviolet rays? Explain why of x-rays and gamma rays are commonly used in radiotherapy. 2. Why do x-rays and gamma rays are commonly used in treating cancer (radiotherapy)? 3. Suppose a 490 nm wavelength of light enters your eyes, what receptors in retina of your eyes will be stimulated and what color will be perceived by your eyes?Which of the following is TRUE about cone cells? a. The three types of cones that humans have are called Q-cones, R-cones, and S-cones b. There are no cones at all in areas important for peripheral vision c. There are more cones than rods in areas of the retina that are important for peripheral vision d. There are no cones where the optic nerve leaves the eyeball