Answer:
Answer:
Anatomically this is because there are no neurons or blood vessels covering the cones.
Explanation:
Fovea centralis and its containing cones cell is surrounded by the macula lutea to form a depression or pit in the retina. The abundant cones cells provide high visual acuity characteristic of the fovea.
In addition an area in the fovea of no blood cells called fovea avascular zone allows light rays to be focused on the fovea, with less scattering,this minimises the losses of incident lights on the fovea, and therefore reception of maximum light rays from objects for acute vision.
Therefore the presence of abundant cones cells in the fovea together with the presence of fovea avascular (area with no blood cells)which reduces dispersion of light rays for maximum receptions are responsible for high visual acuity of the fovea.
This explains the reasons why fovea is refereed to as the center for primary vision or fovea vision where high degree of visual activity is needed such as focusing with microscope, reading,knitting and driving
Explanation:
Answer:
C. Flexibility exercises such as light stretching and bending.
Explanation:
I majored in Health
The last 2
are the correct answer i think
<span>Jennifer's physician suspects she may have an ulcer in the _duodenum_, which is the first section of her small intestine.
The small intestine connects directly to the stomach via the pyloric sphincter. A peptic ulcer involves the spilling of very acidic stomach juice into the duodenum, which is the closest portion of the small intestine to the stomach. This can present as epigastric pain (in the upper center abdomen, just below the xiphoid process, or lower portion of the sternum). Usually it is brought on by ingesting acidic or spicy liquids, alcohol, or after going several hours without eating. Those ingestions can ramp up gastric acid production, and having nothing in the stomach allows pure acid to spill into the duodenum, which irritates an already eroded mucosal epithelium. Eating non-acidic, non-spicy foods like bread or milk helps to alleviate the pain by soaking up the acid in the stomach (bread) or neutralizing some of it (milk). But an empty stomach poses the largest risk of irritation. Also the epigastric region hones the pain in on the duodenum, since it crosses midline from the left upper abdomen (stomach) towards the right side as it continues on. If it were acutely painful in only the left upper quadrant (LUQ) of the abdomen, it would almost assuredly be gastritis or a gastric ulcer (gastro- meaning stomach).</span>
