Answer:
The correct answer is: Pupil.
Explanation:
- Light enters inside the side through a small opening in the iris of the eye which is called the Pupil.
- The outer most part of the eye Cornea and the outer chamber aqueous humor are both transparent and allow light to refract through them.
- The Iris, which a circular and thin comes next to the cornea and aqueous humor. It is reponsible for regulating the amount of light that can reach the retina by altering the pupil size.
- The change in the size of the pupil is mediated by muscles in the iris.
- There are two types of muscles, radial muscles and circular muscles.
- In bright light, the radial muscles of the iris relax while the circular muscles contract. This decreases the pupil size allowing less light to pass into the retina.
- In dim light, radial muscles of the iris contract while the circular muscles relax. This increases the pupil size allowing more light to pass into the retina.
The answer would be D.
For example the structure of stomata are very different from other epidermal cells which is an indication of a different function. Or cells that have chloroplasts compared to one’s that don’t(have other compartments such as amyloplasts).
Stimulant, has a paradoxical effect in children, producing
calmness in children with hyperactive behavior. The exact mechanism of action
is not clearly understood. Stimulant
medications used to treat ADHD can suppress appetite, and the child may lose or
fail to gain weight properly. The client is too young to manage his medications
independently. Ritalin should be given in divided doses.
False
plant cells and animal cells do not possess the same organelles.
For example plant cells have a cell wall while animal cells lack one
