--%>

Function of iris and of pupil

Write down the function of iris and of pupil?

E

Expert

Verified

The iris works like the diaphragm of photographic camera because it has muscles which contract or relax varying pupil diameter. When the luminous intensity heightens parasympathetic nervous system commands the contraction of pupil; when there is shortage of light sympathetic nervous system stimulates the dilation of pupils. These movements depend upon muscles of iris.

   Related Questions in Biology

  • Q : Difference between cerebrum and brain

    Write down the difference between cerebrum and brain? And also write down the main parts of these structures?

  • Q : Describe Warehousing Operations

    Warehousing Operations: An effectual Warehouse Operation should consist of all the tools required for timely and exact shipping, receiving as well as perpetual inventory control. Alliance gives tools for item-level visibility in item

  • Q : Why does bark frequently break and die

    Why does bark frequently break and die naturally?

  • Q : Motivation - Individual Behavior -

    This factor refers to all the forces operating within a person to cause him or her to engage in certain kinds of behavior rather than others. Even if all the factors are present to unless the person is motivated to perform well. Motivation may be internal, for example, a person's skill, ability,

  • Q : State Cellular Communications Cellular

    Cellular Communications: It is most importantly employed as a secure form of signal transfer to the Monitoring Station. The Cell communicators (aka radios) are installed within the building structure, often times close to the alarm system control pane

  • Q : Gametes through meiosis Explain

    Explain whether, the gametes are always formed through the meiosis?

  • Q : What is immuno electrophoresis What is

    What is immuno electrophoresis?

  • Q : Requirement for accuracy-Market

    Requirement for accuracy: The accuracy condition of the system decides the need level of detail, quality and feature of the input data, and superiority of the system logic. The system should be so designed that it provides accuracy that is equivalent

  • Q : Explain Dimension Table Explain the

    Explain the Dimension Table?

  • Q : Consequences of shifting the chemical

    Explain the consequences of shifting the chemical equilibrium of formation of bicarbonate from carbon dioxide and water towards the consumption of products of reverse reaction?