Question

rods are responsible for viewing color.
true
false
23 multiple choice 1 point
this shapes the lens:
orbicularis oris
suspensory ligaments
choroid
ciliary muscles
24 multiple choice 1 point
produces melatonin and may help to regulate sleep wake cycle and mood:
thymus
pineal gland
choroid plexus
pons

Explanation:

Question (Top, about rods and color vision):

Rods in the eye are responsible for vision in low - light (scotopic vision), while cones are responsible for color vision (photopic vision). So the statement "Rods are responsible for viewing color" is false.

• Orbicularis oris is a muscle around the mouth, not related to the lens.
• Suspensory ligaments hold the lens in place but do not shape it.
• Choroid is a layer of the eye related to blood supply and pigment, not lens shaping.
• Ciliary muscles contract and relax to change the shape of the lens for accommodation (focusing on near or far objects).

• Thymus is involved in immune system development, not melatonin production.
• Pineal gland produces melatonin, which regulates the sleep - wake cycle and can affect mood.
• Choroid plexus produces cerebrospinal fluid, not melatonin.
• Pons is part of the brainstem involved in various functions like sleep and arousal but not melatonin production.

Answer:

false

Question 23 (Shapes the lens):