Question

1. The toothpick poking activity in lab:
   1. measured adaptation as more nerve endings became involved with two toothpicks
   2. showed a lower density of nerve endings near the base of the finger compared to the tip
   3. both a. and b. are correct
   4. neither a. nor b. is correct

2. The perceptions of temperature and pressure:
   1. depend on different sensory endings (temperature endings not same as pressure endings)
   2. are subject to the effects of adaptation
   3. both a. and b. are correct
   4. neither a. nor b. is correct

3. Rods:
   1. release an excitatory neurotransmitter, which stimulates “seeing” (light)
   2. release less neurotransmitter in the light than when in the dark
   3. both a. and b. are correct
   4. neither a. nor b. is correct

4. The spinothalamic tract:
   1. is a motor tract
   2. connects the spinal cord to the thalamus
   3. both a. and b. are correct
   4. neither a. nor b. is correct

Answer 1

1) The toothpick poking activity in lab:

Ans : both a and b are correct

a - measured adaptation as more nerve endings became involved with two toothpicks

b - showed a lower density of nerve endings near the base of the finger compared to the tip

2) The perceptions of temperature and pressure:

Ans : c) both a and b are correct

a - depends on different sensory endings.(temperature endings not same as presuure endings)

b - are subject to the effects of adaptation

Temperature receptors are thermoreceptors and that of pressure is mechanoreceptors

3) Rods

Ans : b) Relesae less neurotransmitter in the light than when in the dark.

Rods are phoreceptor cells in the retina.they are sensitive in dim light.they are seen in outer areas of retina.rods are more sensitive to light than cones

4)The spinothalamic tract

Ans : b) connects the spinal cord to the thalamus

Spinothalamic tract is part of anterolateral system.It is a sensory pathway to thalamus