A. Autonomic nervous system and central nervous system
B. Peripheral nervous system and central nervous system
C. Autonomic nervous system and somatic nervous system
D. Peripheral nervous system and somatic nervous system
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The nervous systems is divided into two main parts:
Therefore, the Correct Answer is B.
Which of the following cavities contains a component of the central nervous system?
A. abdominal
B. pelvic
C. cranial
D. thoracic
The Correct Answer is C.The CNS is contained within the dorsal body cavity, with the brain housed in the cranial cavity and the spinal cord in the spinal canal.
In vertebrates, the brain is protected by the skull, while the spinal cord is protected by the vertebrae. The brain and spinal cord are both enclosed in the meninges.
Which of the following is the appropriate threshold value for mammalian neurons?
A. +35 mV
B. -55 mV
C. 0 mV
D. -80 mV
The Correct Answer is B.A neuron is a messenger cell that receives and transmits information the central nervous system and peripheral nervous system. The neurons are the ones that conduct electrical signals, and there is a level that causes depolarization to reach a given value to cause an action potential.
This level is called threshold of excitation and in mammalian neurons it occurs when the threshold is around -55 mV to -65 mV.
Which part of a neuron contains the nucleus?
A. dendrite
B. soma
C. axon
D. synaptic end bulb
The Correct Answer is B.Which of the following are the two major parts of the nervous system?
A. Autonomic nervous system and central nervous system
B. Peripheral nervous system and central nervous system
C. Autonomic nervous system and somatic nervous system
D. Peripheral nervous system and somatic nervous system
The Correct Answer is B.The nervous systems is divided into two main parts: