Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 36, Problem 20RQ
Why do people over 55 often need reading glasses?
- Their cornea no longer focuses correctly
- Their lens no longer focuses correctly
- Their eyeball has elongated with age, causing images to focus in front of their retina
- Their retina has thinned with age, making vision more difficult.
Expert Solution & Answer
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The lens tends to harden with age. This would
make it difficult to focus on nearby objects
make it harder for light to reach the photoreceptor cells
increase the pressure on the retina causing blindness
Which part of your body is responsible for focusing light and sending signals about what you see to the
brain?
a
ear
O b
neck
eye
nose
Why does your eye have a blind spot?
O There is only axons and blood vessels in that region of your eye
The lens bends the light in such a way that it cannot reach a small portion of the
retina.
Light cannot reach the edges of the eye because the pupil is too small
O The receptors in that region are obstructed
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Chapter 36 Solutions
Biology 2e
Ch. 36 - Figure 36.5 Which of the following statements...Ch. 36 - Figure 36.14 Cochlear implants can restore hearing...Ch. 36 - Figure 36.18 Which of the following statements...Ch. 36 - Where does perception occur? spinal cord cerebral...Ch. 36 - If a person’s cold receptors no longer convert...Ch. 36 - After somatosensory transduction, the sensory...Ch. 36 - Many people experience motion sickness while...Ch. 36 - ________ are found only in skin, and detect skin...Ch. 36 - If you were to burn your epidermis, what receptor...Ch. 36 - Many diabetic patients are warned by their doctors...
Ch. 36 - Which of the following has the fewest taste...Ch. 36 - How many different taste molecules do taste cells...Ch. 36 - Salty foods activate the taste cells by. exciting...Ch. 36 - All sensory signals except_____travel to The...Ch. 36 - How is the ability to recognize the umami taste an...Ch. 36 - In sound, pitch is measured in____T and ____...Ch. 36 - Auditory hair cells are indirectly anchored to the...Ch. 36 - Which of the following are found both in the...Ch. 36 - Benign Paroxysmal Positional Vertigo is a disorder...Ch. 36 - Why do people over 55 often need reading glasses?...Ch. 36 - Why is it easier to see images at night using...Ch. 36 - A person catching a ball must coordinate her head...Ch. 36 - A satellite is launched into space, but explodes...Ch. 36 - If a person sustains damage to axons leading from...Ch. 36 - In what way does the overall magnitude of a...Ch. 36 - Describe the difference in the localization of the...Ch. 36 - What can be inferred about the relative sizes of...Ch. 36 - Many studies have demonstrated that women are able...Ch. 36 - From the perspective of the recipient of the...Ch. 36 - What might be the effect on an animal of not being...Ch. 36 - A few recent cancer detection studies have used...Ch. 36 - How would a rise in altitude likely affect the...Ch. 36 - How might being in a place with less gravity than...Ch. 36 - How does the structure of the ear allow a person...Ch. 36 - How could the pineal gland, the brain structure...Ch. 36 - How is the relationship between photoreceptors and...Ch. 36 - Cataracts, the medical condition where the lens of...
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- SCIENCE, TECHNOLOGY, AND SOCIETY Cochlear implants bring hearing to many children who are born deaf. The prognosis is best when the device is implanted before the child is three years old (during the early years when language is developed). Many individuals in the deaf community (which consists of individuals born deaf or who are affected by deafness) who communicate with sign language oppose cochlear implants. They do not view the inability to hear as a disability. This perspective raises ethical questions for some families with children who are deaf. Argue for and against cochlear implants for very young children.arrow_forwardFigure 36.18 Which of the following statements about the human eye is false? Rods detect color, while cones detect only shades of gray. When light enters the retina, it passes the ganglion cells and bipolar cells before reaching photoreceptors at the rear of the eye. The iris adjusts the amount of light coming into the eye. The cornea is a protective layer on the front of the eye.arrow_forwardRods differ from cones in the following ways: a. They detect dim light, not bright light. b. They have a different visual pigment. c. They are not located in the retina. d. All of the above. e. a and b onlyarrow_forward
- Your visual field is ______________. a. a specific, small area of the retina b. what you actually see c. the area where color vision occurs d. where the optic nerve startsarrow_forwardWhich of the following allows eyes to focus on objects both nearby and far away? the pupil the lens the cornea the irisarrow_forwardWhat order does light pass through the structures of the eye, from superficial to deep? These are the strucutres i need put in order: Sclera – Cornea – Choroid – Ciliary body – Ciliary muscle – Iris – Pupil - Retina – Optic nerve – Vitreous humor – Optic chiasma Optic nerve – Optic tract –arrow_forward
- 1) Those with blindsight think they can't see but can react to visual stimuli anyway. Why? they are faking being blind: they can see just fine, just like us the part of the cortex that controls conscious vision is still intact because the part of their visual system that controls visual reflexes is still intact because their eyes work fine and they also don't actually have any brain damage 2) Those with blindsight think they can't see but can react to visual stimuli anyway. Why? they are faking being blind: they can see just fine, just like us the part of the cortex that controls conscious vision is still intact because the part of their visual system that controls visual reflexes is still intact because their eyes work fine and they also don't actually have any brain damagearrow_forwardthings that can affect our perception, such as attention, processing, sensory adaptation, and motivation. Define one of these and provide an example of how it has affected your perception in the pastarrow_forwardWhy do you think people don't use hearing protection more often? What could be done to encourage people to protect their hearing?arrow_forward
- What could be the reason why vitamin A is essential for visual acuity? Select the correct response: • It is converted into the pigment in the iris that absorbs harmful UV radiation. • It is an integral part of the visual pigment in the retina called rhodopsin. • It neutralizes free radicals that can damage the retina of the eyes. • It serves as lubricant in the vitreous humor of the eyes.arrow_forwardI need to differentiate the functions of parts of the ear. The vestibular apparatus, which has fluid and hairs in it--head position ex. car sickness, while reading in moving car; semicircular canals, which have hairs in it--balance and equilibrium ex. dizziness when riding a merry-go-round; and cochlea, which have cilia--hearing ex. hearing loss going to a concert.arrow_forwardA 55 year old man comes to the health clinic for an eye test.He complained of blurred vision it is found that the lens of the eye has developed some opacity the client wants to know if his condition is a major cause for worry What is the likely cause of the blurred vision? How should the nurse alleviate the client's fearsarrow_forward
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Visual Perception – How It Works; Author: simpleshow foundation;https://www.youtube.com/watch?v=DU3IiqUWGcU;License: Standard youtube license