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cluponka [151]
2 years ago
9

Osteoporosis is a bone disease caused by loss of bone density. What type of bone

Medicine
1 answer:
KatRina [158]2 years ago
3 0
C. Mostly the spongy and also the compact
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Compare the two theories of color perception are they completely different
galben [10]
We do not see the world in black and white; neither do we see it as two-dimensional (2-D) or flat (just height and width, no depth). Let’s look at how color vision works and how we perceive three dimensions (height, width, and depth).
Color Vision
Normal-sighted individuals have three different types of cones that mediate color vision. Each of these cone types is maximally sensitive to a slightly different wavelength of light. According to the trichromatic theory of color vision, shown in Figure 1, all colors in the spectrum can be produced by combining red, green, and blue. The three types of cones are each receptive to one of the colors.
The trichromatic theory of color vision is not the only theory—another major theory of color vision is known as the opponent-process theory. According to this theory, color is coded in opponent pairs: black-white, yellow-blue, and green-red. The basic idea is that some cells of the visual system are excited by one of the opponent colors and inhibited by the other. So, a cell that was excited by wavelengths associated with green would be inhibited by wavelengths associated with red, and vice versa. One of the implications of opponent processing is that we do not experience greenish-reds or yellowish-blues as colors. Another implication is that this leads to the experience of negative afterimages. An afterimage describes the continuation of a visual sensation after removal of the stimulus. For example, when you stare briefly at the sun and then look away from it, you may still perceive a spot of light although the stimulus (the sun) has been removed. When color is involved in the stimulus, the color pairings identified in the opponent-process theory lead to a negative afterimage. You can test this concept using the flag in Figure 2.
But these two theories—the trichromatic theory of color vision and the opponent-process theory—are not mutually exclusive. Research has shown that they just apply to different levels of the nervous system. For visual processing on the retina, trichromatic theory applies: the cones are responsive to three different wavelengths that represent red, blue, and green. But once the signal moves past the retina on its way to the brain, the cells respond in a way consistent with opponent-process theory (Land, 1959; Kaiser, 1997).
Depth Perception
Our ability to perceive spatial relationships in three-dimensional (3-D) space is known as depth perception. With depth perception, we can describe things as being in front, behind, above, below, or to the side of other things.

Our world is three-dimensional, so it makes sense that our mental representation of the world has three-dimensional properties. We use a variety of cues in a visual scene to establish our sense of depth. Some of these are binocular cues, which means that they rely on the use of both eyes. One example of a binocular depth cue is binocular disparity, the slightly different view of the world that each of our eyes receives.
A 3-D movie works on the same principle: the special glasses you wear allow the two slightly different images projected onto the screen to be seen separately by your left and your right eye.
Although we rely on binocular cues to experience depth in our 3-D world, we can also perceive depth in 2-D arrays. Think about all the paintings and photographs you have seen. Generally, you pick up on depth in these images even though the visual stimulus is 2-D. When we do this, we are relying on a number of monocular cues, or cues that require only one eye. If you think you can’t see depth with one eye, note that you don’t bump into things when using only one eye while walking—and, in fact, we have more monocular cues than binocular cues.
An example of a monocular cue would be what is known as linear perspective. Linear perspective refers to the fact that we perceive depth when we see two parallel lines that seem to converge in an image (Figure 3).
Vision is not an encapsulated system. It interacts with and depends on other sensory modalities. For example, when you move your head in one direction, your eyes reflexively move in the opposite direction to compensate, allowing you to maintain your gaze on the object that you are looking at. This reflex is called the vestibulo-ocular reflex. It is achieved by integrating information from both the visual and the vestibular system (which knows about body motion and position). You can experience this compensation quite simply.
Finally, vision is also often implicated in a blending-of-sensations phenomenon known as synesthesia.

SORRY ITS A LONG ANSWER!!!
3 0
3 years ago
a client has been transferred to the hospital’s psychiatric unit from a nursing home for increasing confusion. the client’s beha
lisabon 2012 [21]

The nursing staff actions which would positively influence the client’s behavior who is diagnosed with cerebral arteriosclerosis is to help:

  • Regain the balance of the patient
  • Position the patient to prevent contractures,
  • Position the patient to relieve pressure

<h3>Cerebral arteriosclerosis</h3><h3 />

Cerebral arteriosclerosis can simply be defined as a health condition or health problem which is characterized by the of thickening and hardening of the walls of the arteries in the brain.

They general symptoms of this cerebral arteriosclerosis include the following:

  • Facial pains
  • Impaired vision

So therefore, the nursing staff actions which would positively influence the client’s behavior is to help

  • Regain the balance of the client
  • Position the client to prevent contractures,
  • Position the client to relieve pressure

Learn more about arteriosclerosis:

brainly.com/question/2347244

#SPJ1

7 0
1 year ago
Why frenulum hurts when erecting after circumcision​
lesya [120]

Answer:

• Penile erections and sexual activity

After circumcision, nighttime and morning erections often cause pain because they pull on the skin stitches and cause the man to wake up. The pain usually causes the erection to subside; this relaxes the tension on skin stitches, and the pain goes away.

Explanation:

7 0
2 years ago
Nutrient rich blood from the digestive organs must be drained by
Tasya [4]

Answer:

The correct answer is option C. hepatic portal system.

Explanation:

The hepatic portal system involves hepatic portal veins and its accessory tributaries. The hepatic portal system collects blood from digestive organs and spleens that consist of nutrients absorbed from these organs and circulate to the liver.

This system is unique to circulate both oxygenated and deoxygenated blood. This system involves most of the digestive organs from the esophagus to the end of the canal.

Thus, the correct answer is option c. the hepatic portal circulation.  

6 0
3 years ago
How long is heavy cream good for after expiration date
djyliett [7]

Answer:

Unopened heavy cream will generally stay at best quality for about 2 to 3 weeks after the date on the package, assuming it has been continuously refrigerated.

6 0
2 years ago
Read 2 more answers
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