Physiology of Somatic Sensations

Pain from stretching of Glisson's capsule in the liver is sensed by which type of receptor?

• Exteroreceptor

• Proprioreceptor

• Enteroreceptor

• Chemoreceptor

The following is true of receptor potentials except

• Works in an all-or-nothing fashion

• The more depolarized the membrane potential is, the more frequently action potentials are produced

• The stronger the stimulus, the higher the receptor potential is

• Below the threshold, no receptor potentials are produced

Answer explanation

Which of the following is true of temporal summation?

• The higher the concentration of nerves in an area, the stronger the signal

• The greater the number of nerves stimulated, the stronger the signal

• The stronger the stimulation, the stronger the signal

• The more frequently a nerve is stimulated, the stronger the signal

The umbilicus is at what dermatomal level?

• T4

• T8

• T10

• T12

What type of receptor are Pacinian corpuscles according to their adaptation and according to their receptive fields?

• FA1

• FA2

• SA1

• SA2

Two-point discrimination has lowest threshold in

• Fingers

• Face

• Back

• Toes

True or False: Tactile receptors can also detect vibrations

• True

• False

The following sensations are transmitted by the DCML except

• Two-point discrimination

• Vibration

• Proprioception

• Temperature sensation

Proprioceptive signals from the lower limbs are transmitted to the cerebellum via which tract?

• DMCL

• Ventral spinocerebellar tract

• Dorsal spinocerebellar tract

• Lateral spinothalamic tract

Which of the following fibers transmit slow and crude pain signals?

• Aα

• Aβ

• Aδ

• C