Explain why deficiency of vitamin A causes poor night vision or night blindness.

Q: A bar of light in a specific part of the retina, with a particular length and orientation, is the…

A: A bar of light in a specific part of the retina, with a particular length and orientation, is the…

Q: The inner ear is responsible for both hearing and balance. One of the diseases affecting the inner…

A: Ear is structure or sense organ in our body which helps us to hear the sounds from our surrounding…

Q: Loss of the sense of smell often precedes the major symptomsof Alzheimer disease and Parkinson…

A: PARKINSON'S DISEASE SYMPTOMS : Thinking difficulties. Depression and emotional changes. Swallowing…

Q: If a person is born blind, what happens to the occipital (“visual”) cortex?A. Its cells shrink and…

A: People often say that blind people become better than usual at touch and hearing. If a person is…

Q: Match the lesion to the result A. Left optic tract B. Left optic nerve C. Left visual cortex…

A: The optic tract is the visual system part of the brain. It is optic nerve continuation and relays…

Q: Why is it easier to see images at night using peripheral, rather than the central, vision? a. Cones…

A: It is easier to see images at night using peripheral rather than central vision because at the edges…

Q: In a short essay (100–150 words), describe three ways in which the structure of the lens of the…

A: The eye is the central organ for vision. It is made up of 3 layers- choroid, sclera and retina. The…

Q: xplain the process of phototransduction and signal transmission in the retina.  Be sure to include…

A: Phototransduction is the process by which light is converted into electrical signals . It takes…

Q: Which of the following statements is correct A. The innermost layer of the retina contains mainly…

A: The retina is a light-sensitive layer that lines the eye's interior. It is made up of rods and…

Q: Which of the following statements about olfactory receptors is not true? A Stronger odours cause…

A: Olfactory receptors are responsible for the sense of smell or odour. • Statement 1 : Greater the…

Q: Cochlear implants are devices that can be used to restore hearing in some individuals. The implant…

A: When the person is not able to hear from one or both ears because of any conductive or…

Q: A 10-year-old patient’s distance visual acuity was tested and determined to be 20/80. (a) Explain…

A: Visual acuity is measured to determine how clear a person could see. It is determined by using a…

Q: Discuss the difference between general senses and special senses. Then, of the special senses,…

A: Senses are the systems involved in sensation which is the physical process during which sensory…

Q: Which two of the following are part of the olfactory organs? a. olfactory receptor cells b. columnar…

A: The sensory system that comprises various organs and helps us provide the sense of smell (olfaction)…

Q: The suprachiasmatic nucleus receives direct input from the retina and enables light dark circles to…

A: The retinal ganglion cell (RGC) is a type of neuron that is located near the inner surface (the…

Q: We have three types of cones in the retina. Explain how we can see a large range of colors with only…

A: Cone cells are the photo receptors found in the retina of the eye which are meant for color vision…

Q: Fill in the blank:  The receptor cells of these organs are found in the wall of the membranous…

A: The ear is an external sense organ which function as the hearing. The ear also helps in maintaining…

Q: blindness can result from the loss of specific types of cones, or it can occur in individuals having…

A: Colour blindness follows X linked recessive pattern of inheritance. Special types of cells called…

Q: Within the vestibular system of vertebrates, hair cells help detect movement when their cilia are…

A: Stereocilia are mechanosensing structures of hair cells that are present in the inner ear and adapt…

Q: Fill in the blank:  The distal ends of the olfactory neurons are covered with hairlike…

A: The olfactory bulb and olfactory sensory neurons share neuronal connections (OSNs). The OSNs are…

Q: Explain fully how light is detected by your eye and the signal sent to your brain. Be sure to…

A: Vision is one of the basic senses of animals. Eyes are the organs in the head region that receive…

Q: correct about the visual system? A.Input from the left eye is processed exclusively in the right V1…

A: V1 is found in the medial occipital lobe of the brain, in the Calcarine sulcus (near the back of the…

Q: color blindness can result from the loss of specific types of cons or it can occur in individuals…

A: On the human retina, there are photoreceptor cells which has rods and cons. Rods attributes the…

Q: The primary receiving area for vision is the _______.     thalamus     eye     occipital lobe…

A: The primary area for receiving vision is the eye. Therefore, option 2 is correct.

Q: i) Explain why the crystalline lens of the eye gets a virtual object from the cornea.

A: The name “crystalline lens” is given to the natural lens of the human eyes. It is a transparent,…

Q: Why is a retinal defect, such as retinitis pigmentosa, which causes tunnel vision, associated with…

A: Night blindness  Night blindness is the condition of eye in which a person is unable to get clear…

Q: Explain the pain pathway and how morphine alters the concious perception of pain

A: Pain can be defined as a somatic and emotional sensation that is unpleasant in nature. It is…

Q: A patient has had a stroke that damaged the trigeminal nerve but not the facial, glossopharyngeal,…

A: The cranial nerves arise directly from the brain. They are twelve in number. The first two emerge…

Q: What is the “retina” of the olfactory system?    a. The olfactory epithelium   b. The olfactory…

A: The olfactory system is a system that is responsible for the sense of smell in organisms. The…

Q: Why does one feel blinded for a short while on coming out of a dark room.

A: The eye is an organ that controls and enables sight. It has a number of components including cornea…

Q: Why is color vision deficiency a better term than color blindness?

A: Rods and the cones are the two types of photoreceptor cells that are present in the retina which…

Q: Explain why one early symptom of vitamin A deficiency is impaired vision at night (often called…

A: Vitamin A : a. It is a class of nutritionally unsaturated hydrocarbons that include various…

Q: Ear structures from the outer ear into the inner ear are progressively smaller. Explain this…

A: The ear is the hearing organ and it is divided into three segments that include the inner, outer,…

Q: Ming, a student in optometry school, felt very sad when she saw some premature babies at the…

A: As a result of fertilization of the sperm and egg cell zygote will form. This single-cell zygote…

Q: Rhodopsin contains: opsin and retinal vitamin A and ATP red, blue and green pigments light waves The…

A:

Q: Why do people over 55 often need reading glasses? a. Their cornea no longer focuses correctly. b.…

A: When people reach around the age of 55, they experience blurred vision while reading or working.…

Q: The salivary glands produce saliva. Explain why a tumor in the salivary glands that destroys the…

A: Saliva Initial part of digestion takes by saliva. Therefore, saliva is essential for breakdown of…

Q: D. Photoreceptors and the Retina. The following features are associated with the inner layer of the…

A: Following blanks has been filled with suitable options.

Q: Blind Spot Why don't you perceive a blind spot as you go about your daily tasks?

A: What is blind spot? Ratine is present at the back of our eyes which is made up of light-sensitive…