8th-Physiology-Lecture-Exam-Nervous-System-Batch-2021 Flashcards
- Information from the environment is transcribed into neural signals by the
A. Brain
B. Peripheral nerves
C. Sensory receptors
D. Spinal cord
C. Sensory receptors
- Planning and implementation emotions and memory are some examples of which function of the nervous system?
A. Expression of behavior
B. Integrative and information processing
C. Motor Response
D. Sensory Detection
B. Integrative and information processing
- The function of neuroglia in impulse transmission is
A. Cause release of neurotransmitter from synaptic terminals
B. Forms a tight selective barrier impermeable in most substances
C. Provides an environment conducive to nerve to nerve impulse transmission
D. Connects with blood vessels to provide nourishment to neuron
D. Connects with blood vessels to provide nourishment to neuron
Latent varicella virus in the dorsal root ganglion can be transported to the skin and cause herpes zoster in an immunocompromised individual through which mechanism?
A. Axonal transport
B. Receptor mediated endocytosis
C. Synaptic Transmission
D. Vesicular Transport
A. Axonal transport
- The presence of one of the following is an abnormal finding in cerebrospinal fluid
A. Calcium
B. Chloride
C. Red Blood Cells
D. Sodium
C. Red Blood Cells
- Damage to this lobe of the brain can lead to cortical blindness
A. Frontal
B. Occipital
C. Parietal
D. Temporal
B. Occipital
The most important function of the peripheral system is
A. Communication line between the environment and higher centers
B. Contains different control and regulatory centers
C. Integrates and processes information gathered from environment
D. Decides action to be taken in response to stimulus
A. Communication line between the environment and higher centers
- When neurons are arranged into layers this is
A. Cortex
B. Ganglia
C. Gray matter
D. Nucleus
A. Cortex
- With the exception of the olfactory system, all sensory impulses are relayed to the cerebral cortex by the
A. Brainstem
B. Medulla
C. Hypothalamus
D. Thalamus
D. Thalamus
Coordinated movements and balcne are regulated by the
A. Basal Ganglia
B. Cerebellum
C. Cerebrum
D. Spinal Cord
B. Cerebellum
- What is the function of cerebrospinal fluid?
A. Ensures adequate amounts of electrolytes for brain function
B. Ensures adequate nutrition of neurons
C. Help cushion the brain against trauma
D. To prevent entry of high molecular weight substances
C. Help cushion the brain against trauma
- The axon hillock is the portion of the neuron where most action potentials are generated
A. It receives impulses from other neurons
B. It carries impulses away from the cell body
C. It is rich in mitochondria and other organelles
D. It contains high amounts of voltage gated sodium channels
D. It contains high amounts of voltage gated sodium channels
- Regeneration of PNS axons is more possible than those in the CNS Because this neuroglia can provide rows that can guide growth sprouts
A. Ependymal cells
B. Oligodendrocytes
C. Satellite Cells
D. Schwann Cells
D. Schwann Cells
- Chromatolysis or altered staining pattern in a transected axon reflects which of the following?
A. Digestion of cellular debris
B. Increases in axonal transport
C. Increases in protein synthesis
D. Programmed cell death
C. Increases in protein synthesis
- Which of the following is a characteristic of Type 1 (FA1) afferents?
A. Action potentials start at the onset up to the end of the stimulus with wide receptive fields
B. Action potentials start at the onset up to the end of the stimulus with small receptive fields
C. Fires action potential only at the start and at the end of the stimulus with wide receptors
D. Fires action potentials only a the start and at the end of the stimulus with small receptive fields
A. Action potentials start at the onset up to the end of the stimulus with wide receptive fields
- A lesion of the dorsal column medial lemniscus pathway at the level of the medial lemniscus will result to loss of somatosensory discriminatory abilities.
A. On the contralateral side
B. On the ipsilateral side
C. On both sides
D. None of these
A. On the contralateral side
- Acupuncture application of electrodes and other noxious stimuli can suppress pain sensation by
A. Diversion of the persons attention to a more painful stimulus
B. Increasing level of adaptation of nociceptors
C. Activation of spinothalamic tract inhibitory receptive fields
D. Increasing the individuals pain threshold
C. Activation of spinothalamic tract inhibitory receptive fields
- The somatosensory system differs from special senses through which of the following characteristics?
A. Sensation transmitted easily adapt
B. Sensory information transmitted is very limited
C. Receptors are present only in the skin
D. Receptors can be found all over the body and head
D. Receptors can be found all over the body and head
- Transection of 3rd order neuron in the ascending sensory pathway will prevent transmission of sensory impulses from
A. Dorsal root ganglion to the spinal cord
B. Medulla to spinal interneurons
C. Thalamus to somatosensory cortex
D. Spinal cord to thalamus
C. Thalamus to somatosensory cortex
- The release of neuropeptides involved in the non-opioid endogenous analgesia systems may be induced by which of the following?
A. Morphine
B. Naloxone
C. Sleep
D. Stress
C. Sleep
- Pain is relieved by rubbing a painful body part because according to the gate control theory of pain
A. Large diameter fibers are activated that release GABA
B. Calcium channels are blocked leading to less neurotransmitter release
C. There is both presynaptic and postsynaptic inhibition of pain impulses
D. All of these
D. All of these
- Transection of the anterolateral system will result to the loss of which of the following sensations?
A. Fine touch
B. Pressure
C. Thermal
D. Vibration
C. Thermal
- Injury to the somatosensory cortex will result to the loss of the following sensations EXCEPT
A. Discriminatory touch
B. Pain
C. Stereognosis
D. Position sense
B. Pain
- Testing for the presence of vibration sense in the clinics is testing the integrity of the
A. Anterolateral pathway
B. Dorsal column medial lemniscus pathway
C. Thalamus
D. Somatosensory cortex
B. Dorsal column medial lemniscus pathway
- Pain can oftentimes awaken a sleeping individual because of this central pain pathway
A. Spinomesencephalic
B. Spinoreticular
C. Spinothalamic
D. All of these
B. Spinoreticular
- Two-point discrimination of the spinal acuity is due to which of the following afferents?
A. Type 1
B. Type 2
C. Type 3
D. Type 4
A. Type 1
- Afferents signaling visceral pain also covey information from cutaneous receptors leading to this phenomenon
A. Central pain state
B. Hyperalgesia
C. Neurotic pain
D. Referred pain
D. Referred pain
- Which of the following characteristic characterizes second pain?
A. Fast speed of transmission
B. Transmitted A delta fibers
C. Dull diffused and aching type of pain
D. Terminates mostly in the somatosensory cortex
C. Dull diffused and aching type of pain
- Fibers of this central pain pathway terminates in the limbic system resulting to the motivational and effective response to pain such as crying shouting and aversive behavior
A. Spinocerebellar
B. Spinomesencephalic
C. Spinoreticular
D. Spinothlamic
B. Spinomesencephalic
- With regards to pain and thermal sensation transection of the spinal cord at the thoracic level will result to loss of pain and thermal sensation
A. At both sides
B. At the contralateral side
C. At the ipsilateral side
D. None of these
B. At the contralateral side
- Which of the following structure provide most of the refractive power of the eye?
A. Lens
B. Cornea
C. Aqueous humor
D. Vitreous humor
B. Cornea
- The structure of the eye through which light passes are collectively known as?
A. Refractive media
B. Transparent media
C. Dioptric media
D. Translucent media
C. Dioptric media
Which of the following statements is true of presbyopia?
A. It is due to increased elasticity of the lens
B. There is increased ability of the lens to bend light
C. Corrected by bifocal lens
D. The lens becomes thinner
D. The lens becomes thinner
- Which of the following refers to the ability of the eyes to adjust to different distances of the light source while maintaining focal length?
A. Accommodation
B. Adaptation
C. Transduction
D. Translocation
A. Accommodation
- Which of the following structures is responsible for the adjusting the optical focus of the eyes?
A. Lens
B. Cornea
C. Pupils
D. Iris
A. Lens
- Which of the following is true of the relationship between the ciliary body and the lens?
A. When relaxed the lens flattens
B. When relaxed the lens assumes a spherical shape
C. When relaxed tension exerted on the lens decreases
D. When constricted tension of the lens increases
A. When relaxed the lens flattens
- Which of the following statements is true of the focal point of myopia
A. Posterior to the retina
B. In front of retina
C. Always focused on the retina
D. In front of the optic disc
B. In front of retina
- Which of the following is true of focal point hyperopia?
A. Near-sightedness
B. Too long eyeball
C. High refractive power of the lens system
D. Corrected with the used of concave lens
C. High refractive power of the lens system
- Which of the following structures adjust to the amount of light that enters the eyes?
A. Lens
B. Cornea
C. Iris
D. Sclera
C. Iris