--%>
Assignment Help - homework help

Function of iris and pupil

State some of the function of iris and of the pupil?

E

Expert

Verified

The iris works just like diaphragm of photographic camera since it has muscles which contract or relax varying the pupil diameter. Whenever, the luminous intensity heightens parasympathetic nervous system controls the contraction of pupil; whenever there exist shortage of the light sympathetic nervous system stimulates the dilation of pupils. These movements depend on muscles of the iris.

   Related Questions in Biology

  • Q : Concept of universality of genetic code

    Write down the concept of universality of genetic code. And also write down the exceptions to this universality.

    		•
  • Q : Share of a subsidy which benefits

    The burden of a tax is shared through producers and consumers. Under what conditions will consumers pay most of the tax? Under what circumstances will producers pay most of it? What determines the share of a subsidy which benefits consumers?T

    		•
  • Q : Haversian canals and Volkmann canals of

    Specify the Haversian canals and the Volkmann’s canals of bones? Whether, osseous tissue is vascularised or not?

    		•
  • Q : Cellular respiration and respiration

    What is the basic difference between cellular respiration and respiration meaning gas exchange?

    		•
  • Q : Cell types forming the osseous tissue

    List out the three main cell types which forms the osseous tissue? Explain their functions?

    		•
  • Q : Product Development Process What are

    What are the various steps or technical activities in the Product Development Process in an organizational framework?

    		•
  • Q : Description of leaf cuticle Give a

    Give a brief description of the term leaf cuticle?

    		•
  • Q : Define Market Research Market Research

    Market Research: The market research enables us to have an overview of the overall market for packed lunch boxes. It focuses mainly on the people in the market and our competitors. As we have already discussed, the people in the market are our potenti

    		•
  • Q : Describe Enterprise Systems Enterprise

    Enterprise Systems: These are software applications which have cross-organizational capabilities as divergent to department or group-specific programs. They permit for collaboration and communication across the organization via collection of data whic

    		•
  • Q : Situation approach Situation approach

    Situation approach This theory advocates that leadership is strongly affected by the situation from the leader emerges and in which he works. it is based on the assu

    		•