Explain how Visual accommodation is achieved?
Explain why a blurred image is produced in hyperopia and how it is corrected?
Describe briefly the generation of action potential in nerve cells
Describe the functions of glomerulus of the nephron
Answers
Answer:
Accommodation: In medicine, the ability of the eye to change its focus from distant to near objects (and vice versa). This process is achieved by the lens changing its shape.Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies.
Answer:
Explanation:
Accommodation is the adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies. It is the process of adjusting the focal length of a lens.
The hypermetrope, focuses the image behind the retina and not directly on it. This could be due to several reasons: the eye of the hypermetrope patient is shorter than usual, the cornea is smaller... Farsightedness may appear alone or along with astigmatism.
In physiology, an action potential occurs when the membrane potential of a specific cell location rapidly rises and falls:[1] this depolarisation then causes adjacent locations to similarly depolarise. Action potentials occur in several types of animal cells, called excitable cells, which include neurons, muscle cells, endocrine cells, glomus cells, and in some plant cells.
A glomerulus is a network of capillaries located at the beginning of a nephron in the kidney. It serves as the first stage in the filtering process of the blood carried out by the nephron in its formation of urine.
The filtrate then enters the renal tubule, of the nephron. The glomerulus receives its blood supply from an afferent arteriole of the renal arterial circulation. ... The rate at which blood is filtered through all of the glomeruli, and thus the measure of the overall renal function, is the glomerular filtration rate (GFR).