Explain the difference between the function of the rods and the ...

[imanialler]

Explain the difference between the function of the rods and the cones in the retina.
 
  What will be an ideal response?

Question 2

A varicocele can be the cause of ________.
 
  A) impotence
  B) infertility
  C) urinary hesitancy and dribbling
  D) premature ejaculation

[Meganchabluk]

Answer to Question 1

The retina contains special light-sensitive cells known as rods and cones. Rods are sensitive to all levels of light, but not to color. Rods function in both daytime and nighttime vision. Rods can detect objects in very low light, although the image may be less than optimal. Cones, on the other hand, are sensitive only to color. The cones respond to red, green, and blue light. It is difficult to see colors in dim light because it takes many photons to activate a cone.

Answer to Question 2

B
Explanation: A) A varicocele is a varicose vein in the spermatic cord, but this does not cause impotence.
B) Correct A varicocele is a varicose vein in the spermatic cord, and this can cause a low sperm count.
C) A varicocele is a varicose vein in the spermatic cord, but this does not cause urinary problems.
D) A varicocele is a varicose vein in the spermatic cord, but this does not cause premature ejaculation.