included) (not insisting on generic capitals) any two for 1 mark Animals‚ Protoctists‚ Prokaryotes;; (accept Latin equivalents) any two for one mark‚ all three for both that (they are) fertile; 1 (b) 2 1 (c) Total 4 __________________________________________________________________________________ klm Question 3 (a) GCE: Biology B – BYB4 June 2002 Mark across whole of two parts in (a) to credit the following possible points (structure) Distant object Close object Cornea suspensory
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NERVOUS SYSTEM The nervous system consists of the brain‚ spinal cord‚ sensory organs‚ and all of the nerves that connect these organs with the rest of the body. Together‚ these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system (CNS)‚ where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system (PNS) monitor conditions
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The TheNervous NervousSystem System Prof. Melvin Carreon Physiological Psychology University of the East Anatomical Directions Rostral/Anterior – toward the head of a fourlegged animal Caudal/Posterior – toward the tail Inferior/Ventral – toward the belly Superior/Dorsal – toward the back Neuraxis – an imaginary line that runs the length of the spinal cord to the front of the brain Midline – an imaginary line dividing the body into two equal halves Ipsilateral – directional term
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Describe the structure and function of the skeleton system’s two distinct are – Axial System and Appendicular skeleton. Axial system The axial skeleton is the portion of the human skeleton that consists of the bones of the head and trunk of an organism. In the human body‚ it consists of 80 bones and is composed of – 29 bones in the head - (8 cranial and 14 facial bones) and then also 7 associated bones (6 auditory ossicles and the Hyoid Bone) 25 bones of the thorax - (the sternum and 24 ribs)
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How is the structure of cells related to their function? Cell structures come in various shapes and sizes dependent on their location within an organism and what life sustaining process it carries out. These can range from the globular protein of a red blood cell‚ designed to carry four oxygen molecules at a time to the tail like flagellum of a bacteria designed for mobility and penetration of organs within a body. There are two main types of cells‚ eukaryotic cells which are generally plant
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Organelle | Found In | Structure | Function | Cell Membrane (plasma membrane) | Both | A phospholipid bilayer that contains proteins. Lipids face each other while the phosphates face away from each other. Most proteins stay with the outer layer of phospholipids. | Protective barrier. Transports required materials and wastes in and out of the cell. Cell communication. | Nucleus | Both | Dense sphere inside the cell. Surrounded by a nuclear envelope with nuclear pores that allow for material transportation
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I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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Sports Massage Benefits to the Lymphatic system The Structure and Function of the Lymphatic System The lymphatic system originates from blood plasma and is a constant circulation. It consists of complex capillary networks which collect the lymph in various organs. There is an elaborate system of collecting vessels which travel the lymph from the capillaries through lymphatic vessels‚ lymph nodes‚ larger lymphatic vessels to lymph trunks and finally to the large veins of the neck at the junction
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Nervous System Review Sheet 1. List three functions of the nervous system and give a specific example of each. • Reception of stimuli from environment (internal or external) and relay of info to CNS (Sensory division of PNS) – e.g. Receptors in your ear send a signal to the brain when the bell rings. • Integration of stimuli to decide on a response (CNS) – e.g. Your brain receives the signal that the bell is ringing‚ along with signals from your eyes that tell you it is time for class
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ESSAY ‘The structure and importance of the plasma membrane found within and around all cells’ The plasma membrane surrounds all eukaryotic and prokaryotic cells. Eukaryotic cells have membrane bounded organelles whereas prokaryotic cells do not. The plasma membrane forms the boundary between the cell cytoplasm and the environment. Its function are to allow different environments to be established inside and outside the cell. It also controls the movement of substances into and out of the cell. The cell
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