--%>
Assignment Help - homework help

Function of the iris and pupil

Describe the function of the iris and pupil?

E

Expert

Verified

The iris works similar to the diaphragm of a photographic camera as it has muscles which contract or relax differing the pupil diameter. Whenever the luminous intensity heightens the parasympathetic nervous system commands the contraction of pupil; whenever there is shortage of light, sympathetic nervous system stimulates the dilation of pupils. Such movements depend on the muscles of the iris.

   Related Questions in Biology

  • Q : What is Strategic Development Strategic

    Strategic Development: It is also termed as strategic planning, and is basic to making and running a business. Simply put, it is a game plan which sets particular goals and objectives however like a game plan, it is capable of being modified in respon

    		•
  • Q : Example of Knowledge Management -

    Picasso had a collection of masterpieces in his home. They were hung slightly crooked, and visitors couldn't resist the temptation to straighten them. But Picasso felt that when a painting was straight, the observer focused on the frame around it. When the frame was crooked, the beauty of the ima

    		•
  • Q : Characteristics of Object Oriented

    Explains the characteristics of Object Oriented programming language?

    		•
  • Q : Fish and amphibian epidermis How the

    How the fish epidermis is different from the amphibian epidermis?

    		•
  • Q : Needs and Motives - Factor Perception

    People's perception is determined by their inner needs. A need is a feeling of tension or discomfort when one thinks he is missing something or requires something. People with different needs usually experience different stimuli. Similarly people with different needs select different items to rem

    		•
  • Q : Description of neurotransmitter of

    Give a brief description of neurotransmitter of neuromuscular junction? How does nervous system trigger the muscle contraction?

    		•
  • Q : State Communication barriers and

    Communication barriers and weaknesses of team: There is a common barriers and weaknesses of this team such as culture related issues and problems which comes in the way of communication. These language barriers have problems like decision making style

    		•
  • Q : Do membranes structure only outer

    Do membranes structure only outer wrapping of the cells?

    		•
  • Q : Which target organs are neurohypophysis

    Which are the target organs and tissues of the neurohypophysis? Answer: The target organs of oxytocin are the uterus and mammary glands. And the target organs of ADH

    		•
  • Q : State Solutions Selling Solutions

    Solutions Selling: It is a sales methodology. Quite than just promoting an existing product, the salesperson focuses upon the customer's pains and addresses the matter with her or his giving product and services. The resolution of the pain is what com

    		•