Question

​​​​​​​20-25

1. Blocking sodium ion channels in a pain sensory neuron would likely:
   1. increase the pain a person was experiencing
   2. increase the amount of neurotransmitter released at the synapse
   3. both a. and b. are correct
   4. neither a. nor b. is correct

2. Arachnoid mater is:
   1. deep to pia mater
   2. superficial to dura mater
   3. part of the meninges
   4. none of the above is correct

3. A branching network of nerves is called a:
   1. plexus
   2. synapse
   3. ganglion
   4. reflex arc

4. Dermatomes are:
   1. particular areas of skin supplied by spinal nerves
   2. the common name for somatosensory pili
   3. overgrowths of basal cells in the epidermis
   4. the anatomical term for corpuscles of light touch

5. The dorsal root ganglia:
   1. have sensory neurons
   2. have motor neurons
   3. have interneurons
   4. each of the above is correct

6. Motor neurons:
   1. send signals directly to glands (like sweat glands)
   2. receive neurotransmitters that bind and cause IPSPs or EPSPs
   3. both a. and b. are correct
   4. neither a. nor b. is correct

Answer 1

Blocking the sodium ion channel reduces the pain by inhibiting the carrying of nocipetive fibers and as well as inhibit the neurotransmitters.

So d. neither a. Nor b. Is correct.

a. It reduces the pain by blocking sodium channel so it is not suitable answer.

b. Blocking sodium ion channel inhibit the release of neurotransmitters so it is not suitable answer.

Arachanoid matter is located in Central nervous system and is known as one of the  Part of meninges.

C. Part of meninges

​​​​​a. Arachanoid matter is not deep to pia matter.

b. Arachanoid Matter is not superficial to dura matter.

d. One of the above is correct so its not suitable answer.

A branching network of nerves is called as plexus because nerve plexus branches the nerves to the areas of the body.

b. Synapse is used to pass the electrical signals from the nerve cell so it is not the suitable answer.

c. It is group of nerve cells so the ganglia is not a suitable answer.

d. Reflex arc is a mechanism by the neural pathway to a stimulus. So it is not a suitable answer.

The areas of skin supplied by the spinal nerves are called as dermatomes. So the answer is a.

b. It is not a somatomsensory pili so it is not a suitable answer.

c. No it is not a overgrowth of basal cells in the epidermis, it is a nerve supply to skin. So it is not suitable answer.

d. No it is not a anatomical term for the corpuscles light touch it os called tactile so it is not suitable answer.

The sensory neurons are controlled by the dorsal root ganglia of spinal cord. So the answer is a.

b. The ventral root has motor neuron control by spinal nerves so it is not a suitable answer.

c. Dorsal root doesn't have any interneuron control so it is not a suitable answer.

d. Not each of the above answer is correct so it is not suitable.

The motor neuroneuron is a Neuron that function as a supply to the muscles and glands and also produces movements. So d. Neither a. Nor b. is correct.

a. The motor neuron do not send signals to sweat glands.

b. Motor neuron do not receive a neurotransmitters., it release the neurotransmitters so the answer is not suitable.