Biology

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42 Questions - Developed by: V - Developed on: - 566 taken

  • 1
    - sensory receptors have the lowest threshold selectively to one kind of a stimulus
     True
     False
  • 2
    - a sensory receptor responds to stimulus first by the Generator potential (local electrical response at the membrane)
     True
     False
  • 3
    - a generator potential of a receptor has a character of action potential
     True
     False
  • 4
    - the response on the nerve fiber has a character of action potentials („all or none“)
     True
     False
  • 5
    - action potentials „count up“ by amplitude summation
     True
     False
  • 6
    - Weber-Fechner and Stevens laws express the fact, that the stronger is the intensity of
    stimulus the higher (more intense) is the perception
     True
     False
  • 7
    - the stronger (more intense) stimulus produces the higher amplitude of Generator
    potential, and consequently the higher number of action potentials
     True
     False
  • 8
    - an adaptation means that the magnitude of action potentials reduces in time
     True
     False
  • 9
    - the Law of projection expresses that the signals from individual receptors are brought to the specific parts of brain cortex
     True
     False
  • 10
    - baroreceptors are characterized by a slow adaptation
     True
     False
  • 11
    - nociceptors are characterized by a fast (rapid) adaptation
     True
     False
  • 12
    - mechanoreceptors participate on perception of vibrations
     True
     False
  • 13
    - mechanoreceptors participate on perception of the pressure stimulation
     True
     False
  • 14
    - chemoreceptors participate on perception of the sound
     True
     False
  • 15
    - chemoreceptors participate on perception of the tension (pulling)
     True
     False
  • 16
    - mechanoreceptors participate on perception of partial pressure
     True
     False
  • 17
    - mechanoreceptors participate on perception of blood pressure
     True
     False
  • 18
    - the organ of Corti contains ciliary cells being placed in the middle ear
     True
     False
  • 19
    - the sound is an electromagnetic waving with the speed of about 330 m/s in the air )
     True
     False
  • 20
    - the sound spreads in a vacuum only as a longitudinal waving
     True
     False
  • 21
    - the sound spreads in liquids and gases as a longitudinal waving, in solids also as a
    transverse waving
     True
     False
  • 22
    - the lowest sensitivity of human ear is within the range 1 – 3 kHz
     True
     False
  • 23
    - the pitch of the tone is determined by the sound intensity
     True
     False
  • 24
    - a hearing threshold represents the level of sound with an intensity of 1 dB
     True
     False
  • 25
    - a hearing threshold is the lowest frequency of a sound that a human ear can hear
     True
     False
  • 26
    - a pain threshold is the highest frequency of sound that a human ear can hear
     True
     False
  • 27
    - an upper limit for hearing is identical with the pain threshold at the sound frequency of
    1 kHz
     True
     False
  • 28
    - the ion content of a perilymph (within the scala vestibuli and scala tympani) and the
    endolymph (within the scala media) differs each other
     True
     False
  • 29
    - receptors of sound are hair cells located on the basilary membrane of the organ of Corti
     True
     False
  • 30
    - the cochlear potentials represent the manifestation of hair cells activation within the
    organ of Corti
     True
     False
  • 31
    - hair cells respond to stimulation both by the depolarization and hyperpolarization
     True
     False
  • 32
    - a strong sound (a sound of higher intensity) produces higher frequency of vibration on
    the basilary membrane
     True
     False
  • 33
    - different frequencies of sound are detected due to distinct irritation of different places
    on a basilary mebrane of the cochlea
     True
     False
  • 34
    - the organ of Corti is actual analyzer of a body posture
     True
     False
  • 35
    - the bones within the middle ear transmit the sound energy from the eardrum to the oval window, thus providing an impedance adjustment between the gaseous and liquid
    environments
     True
     False
  • 36
    - the speed of sound in liquids is higher than the speed of sound in the air
     True
     False
  • 37
    - in the human body there are chemoreceptors sensitive to different values of pH (acidity)
     True
     False
  • 38
    - in the human body there are receptors sensitive (responsive) to X rays
     True
     False
  • 39
    - there are receptors sensitive to infrared radiation in the human body
     True
     False
  • 40
    - some thermoreceptors, mechanoreceptors, or nociceptors belong to the group of exteroreceptors
     True
     False
  • 41
    - some thermoreceptors, mechanoreceptors, chemoreceptors, photoreceptors, nociceptors belong to the group of interoreceptors
     True
     False
  • 42
    True
     True
     False

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