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.
Structure and function of the hypothalamus and pituitary gland.
Pulmonary function test
A typical open-end wrench. Note the size difference on each end and that the head is angled 15 ...
State the transformations on the function f(x)= 4sin(x-pi)-2 and then graph two cycles below.
Given the parent function f(x)=log10(bottom exponent)x, state the equation of the function that
Magnified view of the retina as seen through the pupil