What differentiates the absolute refractory periods from the relative refractory

Question

What differentiates the absolute refractory periods from the relative refractory periods? Question 66 options:

a)no new action potential can be generated
b)all new action potential must be produced during this period
c)the threshold must not be negative
d)it stretches between the repolarization and the hyperpolarization

What important structural component is responsible for the transport of organelles and molecules in the neuron from one end to another? Question 65 options:

a)the multiple dendrites
b)the chromatophilic substance
c)the extensive RER
d)the complex cytoskeleton

The CNS is protected by a thick cranium and some meninges. To explain the contribution of each meninx, one discusses the following:

Question 68 options:

a)dura mater: flow of the CSF and via villi exchange with the blood

arachnoid mater: anchor CNS to the dural sinuses

pia mater: adherence to the CNS

b)dura mater: adherence to the CNS

arachnoid mater: flow of the CSF and via villi exchange with the blood

pia mater: anchor CNS to skeletal tissue

c)dura mater: anchor CNS to skeletal tissue

arachnoid mater: flow of the ECL and via villi exchange with the blood

pia mater: adherence to the PNS

d)dura mater: anchor CNS to skeletal tissue

arachnoid mater: flow of the CSF and via villi exchange with the blood

pia mater: adherence to the CNS

To understand the hierarchy of the nervous system, one must discuss the 5 levels. By explaining the following levels, one can differentiate the voluntary and involuntary components.

Question 67 options:

CSP, PNS, SNS, SANS, PANS

CNS, PNS, SNS, SANS, TANS

CNS, PNS, ANS, SANS, PANS

CNS, PNS, SNS, SANS, PANS

a)dura mater: flow of the CSF and via villi exchange with the blood

arachnoid mater: anchor CNS to the dural sinuses

pia mater: adherence to the CNS

b)dura mater: adherence to the CNS

arachnoid mater: flow of the CSF and via villi exchange with the blood

pia mater: anchor CNS to skeletal tissue

c)dura mater: anchor CNS to skeletal tissue

arachnoid mater: flow of the ECL and via villi exchange with the blood

pia mater: adherence to the PNS

d)dura mater: anchor CNS to skeletal tissue

arachnoid mater: flow of the CSF and via villi exchange with the blood

pia mater: adherence to the CNS

To understand the hierarchy of the nervous system, one must discuss the 5 levels. By explaining the following levels, one can differentiate the voluntary and involuntary components.

Question 67 options:

a)

CSP, PNS, SNS, SANS, PANS

b)

CNS, PNS, SNS, SANS, TANS

c)

CNS, PNS, ANS, SANS, PANS

d)

CNS, PNS, SNS, SANS, PANS

Explanation / Answer

66. Absolute refractor period begins from the time the firing level is reached until the repolarization is approximately 1/3 completed.in this period no new action potential can generated. 65. Multiple Dendrites helps in the transfer of molecules and organelles from one end of neuron to other . 68. D. Dura mater, anchor CNS to bone I.e. cranium. Arachnoid mater , flow of CSF and via villi exchange with blood. Pia mater , adherence to the CNS. 67. D. Central nervous system, peripheral nervous system, somatic nervous system, sympathetic autonomous nervous system and parasympathetic autonomous nervous system.

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