Revision for Unit 5 Optics Definitions 1. Absorb: Is the process where light energy is taken in the object and converted to thermal energy. 2. Transmit: Is the process where light rays (or energy) go through the object and out of the other side. 3.
The trichromatic theory has short (blue), medium (green) and long (red) wavelength. Each cone responds to a broad range of wavelengths. The ratio of the activity is across three types of cones and the more intense the light it increases the brightness of color. Opponent theory the brain perceives color on a continuum from red to green and also from yellow to blue. The mechanism for this theory is a bipolar cell excited by a set of wavelengths.
Containing axons from the ganglion cells that are in the retina of each eye, but only one passes on the information for the visual field d. Geniculate nuclei – Or Lateral geniculate nuclei (LGN)has six layers which gathers input the contraor ipsilateral eye. Four layers that (dorsal) that have small neurons that sustain discharge patterns, and are sensitive to color. Two other layers are ventral layers which have large neurons known for the transient discharge patterns and high contrast grain. e. Primary visual cortex – Is responsible for processing information from what is input from the eyes 2. What is an example of a visual deficit associated with brain damage, disorder, or disease affecting the visual pathway?
As you focus on a nearby object while it moves closer to your face, all of the following processes occur except: (a) the pupil constricts; (b) the medial rectus muscles contract; (c) the lenses become thicker; (d) the ciliary muscle relaxes; (e) the eye shifts from the scotopic to photopic mode. 15. Otoliths add weight, and thus inertia, to the membranes of: (a) the cochlea; (b) the saccule; (c) the semicircular ducts; (d) the ora serrata; (e) the olfactory
SNS-motor portion under voluntary control ANS-motor portion under involuntary control 6 what are the functions of the dendrites and the cell body of a neuron? -dendrites collect signals the cell body of a neuron lacks centrioles 7 which neuroglia are CNS and PNS ? functions? - astrocyes- CNS-maintain chemical environment , support and nourish oligodendrocyes-produce myelin sheath around adjacent azons microglia-migrating phagocytes ependymal cells-form and circulate cerebrospinal fluid PNS Satellite cells-support cells within PNS ganglia Schwann cells- produce myelin sheath around axons 8. function of myelin? Which neuroglia produce myelin?
Fill refraction cell with water. 4. Direct laser pointer at Refraction cell so that the light from the laser pointer enters the refraction cell at the reference line. 5. Place a dot on the piece of paper at the point where the laser light originates from the pointer and where it leaves the refraction cell after passing through the water.
A certain red light has a wavelength of 725 nm and another red light has a frequency of 4.28 X 1014 /sec. Which would have higher energy per photon? (4.28 X 1014/sec; it is shorter) ______________8. Find the color of light whose frequency is 5.21 X 1014 cycles/sec.
Also velocity of the light in a medium is inversely proportional to the refractive index of that medium. If the refractive index increases, then velocity of the light decreases. Reflection happens when light is returned back from the surface it hits. Incoming and reflected lights have the same angle as the surface. If the surface reflects most of the light then we call such surfaces as mirrors reflective.
Thus, a spatial pattern of neuronal stimulation develops in the medial superior olivary nucleus, with sound from directly in front of the head stimulating one set of olivary neurons maximally and sounds from different side angles stimulating other sets of neurons on opposite sides. This spatial orientation
In other words, neurotransmitters are the messages that nerve cells send out, and they cross the gaps between each of the cells. When released by the sending neuron, neurotransmitters travel across the synapse and neuron. Therefore, they influence whether that neuron will generate a neural impulse or not. B) An agonist mimics neurotransmitters functions by binding to receptor sites and stimulating the sending neuron. C) An antagonist does the opposite of agonist.