cells transmitting nerve impulses. There are two types of neurones; Sensory cells‚ which send impulses from the receptor to the central processing centre and the motor neurones‚ transmit impulses from the brain and spinal cord to the effector cell that will respond to the stimulus. Impulses flow along thin tubes of cytoplasm. In the sensory neurones‚ the cell body is located in the middle and two tubes come out of it; one from the dendrites at one end‚ which receive impulses from the receptor cell
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digital nerves- arise from the superficial branch of the radial nerve and the dorsal branch of the ulnar nerves PALM Palmar interosseus( between the bones) Abductor ( 2 heads- transverse and oblique head) Volar plate (MP joint) First dorsal interosseus - deep ulnar nerve injury‚ these muscles would be affected 3 volar interossei adduct the fingers Function of the lumbricals(
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Cholesterol is a waxy steroid‚ mostly made by in the liver and found certain foods‚ such as food from animals‚ like dairy products‚ eggs and meat. Cholesterol is needed in the body for various functions such as insulating nerve fibres‚ making hormones such as sex hormones and steroid hormones and for making bile acids‚ which are essential for the digestion and absorption of fats‚ while the most vital function of that is to make up the membrane structure of every cell in the
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Describe the five stages that comprise the process of sensory processing and the perception of information. a. Sepcific types of stimuli activate specialized receptors (light‚ soind waves‚ chemical molecule‚ pressure) and translate information into nerve impulses b. Specialized neurons break down and and analyze the specific features of the stimuli c. Numerous stumul “pieces’ are reconstructed into a neural representation that is then compared with previously stored information. d. We recognize the
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Parkinson’s or PD is a disease that attacks the peripheral nervous system around the age of 50 years old. This devastating disease causes the degeneration of the mind and gets worse with time. It is categorized by the loss of basic mobility‚ making daily life a real challenge. It causes most motor skills to go away entirely and leaves a person with a resting tremor‚ akineisa‚ and muscle stiffness. Parkinson’s is incurable but treatment is available to subdue symptoms. It is genetic and may be caused
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March 26‚ 2013 Lecture -The function of the eye is to convert photons of light into action potentials (nerve impulses). -The inner layer is a nervous tunic (made out of nerve cells)=retina. -Refraction: Bends light. -The purpose of the cornea and the lens is to take an object and focus every little detail of the object on the retina on the back of the lens. Upside down and backwards. -When light goes through medias‚ it bends. -Lens are suspended by ligaments behind the pupil. Suspensory ligaments
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NOSE CHEMICALS HEARING EARS SOUND TASTE TONGUE CHEMICALS SIGHT EYES LIGHT RESPONSE TO STIMULI When a sensory organ detects a stimulus‚ information in the form of nerve impulses‚ is sent to the brain The brain interprets the information and a suitable response is produced by effectors The pathway of nerve impulses from stimulus to response; Effectors are parts of the body that carry out responses to stimuli. Examples of effectors are muscles and glands LIMITATIONS OF SIGHT -OPTICAL
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Human Biology Unit 2 Assignment Aim: Carry out an experiment to measure the heart rate and ventilation rate before‚ during and after moderate exercise. Introduction: I predict that during exercise the heart and respiratory rate (RR) will increase depending on the intensity of exercise and the resting rates will be restored soon after exercise has stopped. I believe that the changes are caused by the increased need for oxygen and energy in muscles as they have to contract faster during exercise
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current is directed over the nerves that lead to those electrodes so that a computer can record and evaluate the consequent nerve impulse for velocity‚ onset and amplitude. Neuropathies are caused by damage to the nerves axon and/or damage to the myelin sheath surrounding the nerve. If a response is slower than normal‚ damage to the myelin sheath is implied. If the height of the response’s amplitude is low with a relatively normal speed of conduction‚ damage to the nerve axon is implied. How
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then converted into action potentials in the membranes of the vesicles. These travel as nervous impulses through the rod or the cone cell and reach the synaptic knobs. From here the impulses are transmitted to the bipolar nerve cells‚ then to the ganglions and then to the optic nerves. Thus the nervous impulses generated in the retina are carried to the brain by about a million neurons of the optic nerve. The vision is controlled by the occipital lobe at the back of the brain. The information received
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