Question

49

5. With both hands in one container of room temperature water, the right hand senses the water as being warm while the left hand senses the water as being cold. This is normal functioning if:  
   1. the right hand was in cold water just before putting the hand in room temp water
   2. the left hand was in warm water just before putting the hand in room temp water
   3. both a. and b. are correct
   4. neither a. nor b. is correct

50

6. 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

51

7. 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

52

8. 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

53

9. 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

49. Both options are correct

With both hands in one container of room temperature water, the right hand senses the water as being warm while the left hand senses the water as being cold. This is normal functioning if:  

1. the right hand was in cold water just before putting the hand in room temp water
2. the left hand was in warm water just before putting the hand in room temp water

Reason:- It's because your senses are relative. They don't measure an absolute temperature, they make their measurements relative to the things around it.

The temperature sensors on the hands measure the temperature of the water relative to the temperature of the hand. If the water is warmer than the hand, it feels warm, and if it is colder than the hand, it feels cold.