Which of the Following Statements Is True of a Situation

question 63

Multiple Choice

Which of the following statements is true of a situation where the body encounters the same invader twice?

• A) Both the first and second immune responses are slow.
• B) The first response is faster than the second response.
• C) The second response is faster than the first response.
• D) Both the first and second immune responses are fast.

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Definitions:

Pupil

Circular opening in the iris through which light enters the eye.

Rods

Photoreceptor cells in the retina of the eye, highly sensitive to light, and responsible for vision under low light conditions.

Optic Disc

The point of exit for ganglion cell axons leaving the eye. Because there are no rods or cones overlying the optic disc, it creates a blind spot in visual fields.

Sensory Retina

The part of the retina that contains photoreceptor cells (rods and cones) responsible for converting light into electrical signals for vision.