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Sensory

A&P

QuestionAnswer
1.) If you activate a nerve ending it starts sending signals: If you push harder the signals do not get bigger, the amount of signals being sent increases. If you push lighter you'll get fewer signals. If you keep pushing the same, you also get fewer and then Adaptation ocurs.
2.) What part has to be involved if you are going to be consciously aware of a sensation? The cerebral cortex has to be involved
3.) There is a picture in 7A of a spinal chord and brain cross section. Spinal chord part-point to different areas and saw what is this for ? like pain and temperature. Or vibration and proprioceptor anesthesia. Dorsal Column System: Responsible for fine touch, vibration, kinesthesia. Pyramidal or Corticospinal: Fine motor control Spinothalamic: Pain and temperature.
4.) Know the fluids and chambers in the eye
5.) Know the realization- review that the image on the retina the image on the retina is upside down. its reversed right to left and also the distance determines the size. If you are far away it is smaller, if you're closer its bigger.and is the tongue imagine upside down?
6.)know what accommodation is and when does it make this adjustment ? When it wants to focus and look at something closer to you, your eyes are automatically designed to look at the stars. if you want to look at a book you will need to make an adjustment. the increase in the curvature of the lens for near vision
7.) What happens to the lens when you do look at something close to you? How do you change the lens?You pull it forward and it gets rounder and it can bend the light that is heading away from you better towards the eye- When you look at something close up, ex a book, the muscles inside your eye that surround the lens contract to make the lens change shape. This focuses the light from the book onto your retina.
8.) review the difference between rods and cones? What they are both specialized to do? which is measured with the letter chart for sharpness.- the chart measures visual acuity. Rods are for dim light vision(scotopic vision). They do not mediate color vision low acuity. Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity
Rods: are active in the dark- light turns them off-signals on optic nerve Cones: Short wavelengths (blue) medium wave (green) long (red)
9.) is the retina uniform ? or some parts are used to detect sharp images? is there any difference between the central and peripheral vision? Central Vision: This actually refers to “sight” the system that helps us identify clarity and detail Peripheral Vision: is equally important to help orient us in our day to day life. is important for motion processing and orientation.
10.) what is the place on the retina used to give you the greatest visual acuity? The phobia or macula. The phobia is in the macula. This is your central vision. there are more cones there than rods.
11.) which lobe of the cortex receives information from the eyes? The occipital
12.)when there are pressure waves in the air, what is the first thing to detect them and react to them ? The ears- the ear drum or the name is tympanic membrane.
13.) What does the tympanic membrane vibrate? the middle ear bones which are? and then that vibrates that and this and that and then finally basilar membrane which has the hair cells on it that vibrates and then action potentials are created. that's when the vibrations turn into electrical signals.
14.) is there a tube in the middle ear that leads to the throat? The Eustachian tube
15.) is there any part of your head where you have motion detectors? Where they detect if you are going forward, backwards, up and down or sideways? What are those places called? The utricle and saccule
16.) is there a place that detects head rotation? The semicircular canal-which also has hair cells in them.
17.) The primary taste like sweet, sour, bitter, salt, savoriness,? what else adds appreciation to the food we eat? Smell, texture, temperature, spiciness, false coolness(menthol), astringency (dry mouth-tea taste), fat, and odor all of those come together to give us a sense of flavor.
BONUS: What is intraocular pressure IOP answer in ,mmHg either a number in the range or you can write the range with mmHg written next to it. -12-22 mm Hg
Created by: alecamila