Question

Questions 1 pts Humans and many other diurnal animals have three types of cones - one stimulated maximally by blue light, a second maximally stimulated by green light, and a third stimulated maximally by red light. How can human beings see colors such as orange, yellow and purple? When red cones are stimulated, they inhibit blue and green cones. When blue cones are stimulated, they inhibit only green cones. Green cones when stimulated, do not inhibit other cones, but do inhibit rods. The density of cone photoreceptors is uneven across the surface of the retina, and different wavelenghts of light display different refraction patterns in the retina, thus stimulating cones at different spots within the retina. The visual transduction pathway is characterized by extensive divergence as signals from photoreceptors activate multiple bipolar cells, and bipolar cells activate multiple ganglion cells, which allows for discrimination of many different colors. In many parts of the retina, cones containing different pigments fuse together, so that those cones can be stimulated maximally by two different colors at once. The brain perceives colors by detecting the intensity of stimulation of each of the three types of cones Question 74 - 1 pts When photoreceptors are stimulated by light, their membrane potential becomes more positive their membrane potential becomes more negative. Whey release more neurotransmitter Both A and Care correct Both B and Care correct

Answer 1

62)these glial cells are always in contact with cerebrospinal fluid:

Ans: ependymal cells

63)what symptoms might a person experience if their cerebellum was damaged:

Ans:Difficulty speaking