When You Enter a Darkened Theatre, It Takes a While

question 75

Multiple Choice

 When you enter a darkened theatre, it takes a while before you can see your surroundings clearly. The most likely explanation for this phenomenon is that

• A) the lens needs time to accommodate to the change in lighting.
• B) the glutamate in rods has been depleted and more must be synthesized.
• C) the visual system switches slowly between processing inputs from cones to inputs from rods.
• D) it takes about 30 minutes for rhodopsin to regenerate after it has broken apart in response to light.

---

Definitions:

Midpiece

The segment of a spermatozoon between the head and the tail, containing mitochondria to power movement.

Meiosis

Nuclear division process required for sexual reproduction. Two nuclear divisions, meiosis I and II, halve the chromosome number for forthcoming gametes.

ATP

Adenosine triphosphate, a high-energy molecule that stores and transfers energy within cells, enabling various biochemical processes.

Cleavages

The series of cell divisions that occur immediately after fertilization, leading to the formation of a multicellular embryo.