Form 2 note CHAPTER 1: THE WORLD THROUGH OUR SENSES 1.1 Sensory Organs and Their Functions Sensory Organs and Their Stimuli 1. Humans being have five main sensory organ‚ which are skin‚ nose‚ tongue‚ ears and eyes. 2. Sense detects stimuli‚ that is changes in surroundings (around us). 3. Five senses: i. sight ii. hearing iii. touch iv. taste v . smell 4. Senses are part of the body called sensory organs. 5. Changes or object that
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"umami" from taste receptors sensitive to amino acids. *Women‚ in general‚ have a greater number of taste buds than men. 4.) Ear - The ear is the organ of hearing. The outer ear protrudes away from the head and is shaped like a cup to direct sounds toward the tympanic membrane‚ which transmits vibrations to the inner ear through a series of small bones in the middle ear called the malleus‚ incus and stapes. Fun Fact: *Some people have "perfect pitch"‚ which is the ability to map a tone precisely
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What is Cochlear Damage? The cochlea is a tiny‚ snail-shaped structure. It is the main organ of hearing and is part of your inner ear. Cochlear Damage means that all or part of your inner ear has been hurt. Damage to the cochlea typically causes permanent hearing loss. This is called sensorineural hearing loss (SNHL). Many things can cause SNHL‚ or cochlear damage‚ including loud or extended noise exposure‚ certain powerful antibiotics‚ meningitis‚ Meniere’s disease‚ acoustic tumors‚ and even
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Pascal (Pa) - Newton per square metre (N/m2). The human audible range ■ Human ear can perceive a very wide range of sound pressure. | |Sound Pressure expressed in | | |Pa |µPa | |Softest Noise just Heard by a Human Ear (the Threshold of |20 x 10-6 |20 | |Hearing)
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sciences can be used to place a person at the scene of a crime. Recently the recoveries of ear prints at a crime scene have become the basis for several convictions without much research having been done on reliability of such prints and many of these charged persons have been found not guilty after appeals or other evidence has proved their innocence. Some “experts” claim that the uniqueness found in each human ear justifies the use of earprints as proper scientific evidence while others argue that earprints
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SPECIAL SENSES EYES – the organs of sight. We learn much about the environment through these senses. IMPORTANCE: We learn about the people‚ things and happenings around us. To students‚eyes are very important. Eyes makes students understand their lessons better by observing‚ reading ang analysing facts. With the eyes we may avoid accidents ant other cicumstances that makes us sick. COMMON AILMENTS: 1st Group • Myopia - nearsightedness‚ clearly sees object near them. Concave
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more exciting. Besides fun‚ it was also demanding because I had assignments to turn in. We were asked to write a report on the inner ear. This was quite enlightening for me because I learnt about the parts and functions of the human ear and how it works as a transducer. Apparently we barely take into cognizance‚ the importance of taking good care of our ears as they can be easily damaged. In addition‚ writing the glossary of terms‚ another assignment was somewhat tasking but thankfully I sailed
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The Auditory Sense or Organ of Hearing The Ear is divided into 3parts: External or outer ear Auricle (pinna) Made of elastic cartilage. Covered by skin placed on the opposite side of the head. External auditory canal Also called the “ear canal” auditory meatus: either of the passages in the outer ear from the auricle to the tympanic membrane. Tympanic membrane The tympanic membrane is a vital feature of the human ear‚ and is more commonly known as the eardrum. The tympanic membrane’s
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levels above 110 decibels strip insulation from nerve fibres carrying signals from the ear to the brain. Loss of the protective coating‚ called myelin‚ disrupts electrical nerve signals. The same process‚ this time due to an attack from the immune system‚ damages nerves in the brain and results in MS. Loud noises are well known to lead to hearing problems such as temporary deafness or tinnitus (ringing in the ears). But this is the first time scientists have been able to identify the underlying
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influences the human ear will be discussed in this section. Sound has two aspects which influences the surrounding environment‚ namely the amplitude of the sound waves‚ and the frequency. 1.3.1 Amplitude The amplitude of a sound wave determines the intensity or “loudness” of the wave and is normally measure in decibels [dB]. Amplitude is the measured of the “height” of the wave. Higher amplitude would result in a louder sound whereas lower amplitude would result in softer sound. The human ear can hear within
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