Preview

Unit 1 Gcse Biology

Good Essays
Open Document
Open Document
4688 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Unit 1 Gcse Biology
GCSE Biology for teaching from September 2011 onwards (version 1.1)

3.3 Unit 1: Biology 1
B1.1 Keeping healthy

Subject Content

A combination of a balanced diet and regular exercise is needed to help keep the body healthy. Our bodies provide an excellent environment for many microbes which can make us ill once they are inside us. Our bodies need to stop most microbes getting in and deal with any microbes which do get in. Vaccination can be used to prevent infection. Candidates should use their skills, knowledge and understanding to: ■ evaluate information about the effect of food on health
Additional guidance: Candidates will be given data to work from.

3



evaluate information about the effect of lifestyle on development
…show more content…
Additional guidance:

Subject Content

b) Cells called receptors detect stimuli (changes in the environment). Receptors and the stimuli they detect include:
■ ■ ■

Knowledge and understanding of the structure and functions of sense organs such as the eye and the ear are not required.

receptors in the eyes that are sensitive to light receptors in the ears that are sensitive to sound receptors in the ears that are sensitive to changes in position and enable us to keep our balance receptors on the tongue and in the nose that are sensitive to chemicals and enable us to taste and to smell receptors in the skin that are sensitive to touch, pressure, pain and to temperature changes.
Additional guidance:

3





c) Light receptor cells, like most animal cells, have a nucleus, cytoplasm and cell membrane.

A knowledge of the functions of the cell components is not required.

d) Information from receptors passes along cells (neurones) in nerves to the brain. The brain coordinates the response. Reflex actions are automatic and rapid. They often involve sensory, relay and motor

You May Also Find These Documents Helpful

  • Good Essays

    The sensory receptor detects a stimulus. The interneurons receive inputs from sensory receptors and synapse on motor neurons. The effects on motor neurons can be excitatory or inhibitory. Lastly, motor neurons produce muscle contraction, and motor response. Reflexes often have effects in groups of motor neurons to different muscles; sometimes at different joints in the same limb or in a different limb. Reflexes are valuable tools for clinical evaluation of how our nervous system is functioning. For reflex to occur, all elements must be functional and our pathways must be intact. If reflexes are absent, the physician can diagnose where the pathway has been interrupted and can diagnose where function is compromised.…

    • 512 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Biochemistry Quiz

    • 396 Words
    • 2 Pages

    1. Receptors for touch, heat, pressure, vision, and hearing are classified as ___ because they sense stimuli that arise external to the body.…

    • 396 Words
    • 2 Pages
    Better Essays
  • Satisfactory Essays

    01.05 biology

    • 363 Words
    • 4 Pages

    What does it mean when scientists say that living organisms share a universal genetic code?…

    • 363 Words
    • 4 Pages
    Satisfactory Essays
  • Good Essays

    Year 12 Biology Research

    • 540 Words
    • 3 Pages

    It is essential in our bodies that oxygen and carbon dioxide levels are in appropriate and healthy amounts within the bloodstream as the excess or lack of the gases becomes detrimental to the being. Fortunately, current medical technologies allow us to monitor and measure the levels of oxygen and carbon dioxide within the bloodstream with a simple test. The pulse oximeter and the arterial blood gas analysis machine are two technologies that give us insight into the closed circulatory system of living beings.…

    • 540 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Flatworm Research Paper

    • 1515 Words
    • 7 Pages

    These cells are distributed over the body, but are most concentrated at the anterior end.…

    • 1515 Words
    • 7 Pages
    Good Essays
  • Good Essays

    a) Briefly describe the path of information from the targeted sensory organ (i.e. eye, ear, skin, etc.) to the brain. Include a synthesis of terms/information from both Chapter 2 - Biological Basis of Behavior and Chapter 3 - Sensation and Perception in your description.…

    • 702 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    As Biology Unit 1 Summary

    • 932 Words
    • 4 Pages

    Cell theory: The basic unit of structure and function of all living organisms is the cell.…

    • 932 Words
    • 4 Pages
    Satisfactory Essays
  • Good Essays

    Summary- 1). Stimulus 2). Signal travels everywhere via the bloodstream 3). Response: Limited to cells that have the receptor for the signal…

    • 1371 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    Sensory-perceptual and cognitive patterns. Vision, hearing, taste, touch, smell, pain perception and management; cognitive functions such as language, memory, and decision making.…

    • 308 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    These points clearly indicates that although our sense might be working properly and often helps us take correct decision but we should not always trust them completely as at times there might me some misinterpretation of data send by sensory organs…

    • 720 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Sensory System

    • 532 Words
    • 3 Pages

    Sight: Sense of sight or vision is the ability to see, this is done through the photoreceptor cells, which are either Rods or cones.…

    • 532 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Psycho 11

    • 1659 Words
    • 6 Pages

    Sensory system is a part of the nervous system responsible for processing sensory information. A sensory system consist of sensory receptors, neural pathways and part of the brain involved in sensory perception. A sensory receptors is a sensory nerve ending that responds to a stimulus in the internal and external environment of an organism. A neural pathways serve to connect relatively distant areas of the brain or nervous system, compared to the local communication of grey matter. Commonly recognized sensory systems are those for vision (which is the ability to interpret the surrounding environment by processing information that is contained in visible light), auditory (hearing), somatic sensation (touch), gustatory (taste), olfaction (smell) and vestibular (balance/movement).…

    • 1659 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    PSL300 Study Notes

    • 4661 Words
    • 19 Pages

    Each receptor has an adequate stimulus  the form of stimulus that it is most responsive to…

    • 4661 Words
    • 19 Pages
    Powerful Essays
  • Good Essays

    Science Chapter 1 F2

    • 1621 Words
    • 7 Pages

    Sensory organ Eye Ear Nose Tongue Skin Sense Sight Hearing Smell Taste Touch Stimuli Light Sound Chemical in air Chemical in foods Pressure, heat, cold, touch…

    • 1621 Words
    • 7 Pages
    Good Essays
  • Good Essays

    Mechanism of Human Behavior RECEIVING MECHANISM RECEPTOR   an organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to a sensory nerve. a region of tissue, or a molecule in a cell membrane, that responds specifically to a particular neurotransmitter, hormone, antigen, or other substance. EYES & VISUAL SENSATION…

    • 634 Words
    • 5 Pages
    Good Essays