The human nervous system is responsible for transmitting signals between different parts of the body and the brain. It comprises two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS includes the brain and the spinal cord, while the PNS consists of all the nerves that connect the CNS to the rest of the body.
Option A is the correct answer because it includes both the CNS and the PNS, which are the two main components of the human nervous system. The CNS is responsible for processing and coordinating information, while the PNS is responsible for transmitting information between the CNS and the rest of the body.
Option B is incorrect because it only includes the CNS and the somatic nervous system, which is responsible for voluntary movement and sensory information. It does not include the PNS, which is responsible for involuntary functions such as digestion and breathing.
Option C is incorrect because it includes the sympathetic and parasympathetic nervous systems, which are part of the autonomic nervous system. The autonomic nervous system is responsible for regulating involuntary functions such as heart rate and blood pressure, but it is not one of the two main components of the human nervous system.
Option D is incorrect because it includes the autonomic and somatic nervous systems, but it does not include the central nervous system. The somatic nervous system is responsible for voluntary movement and sensory information, while the autonomic nervous system is responsible for regulating involuntary functions.
In conclusion, the correct answer is option A, which includes both the central nervous system and the peripheral nervous system. The CNS and the PNS work together to ensure the proper functioning of the human body.

Broca's area is a region in the dominant hemisphere of the brain, typically located in the left frontal lobe. It is responsible for language production, including speech and writing. Damage to this area can result in a condition known as Broca's aphasia, where the individual has difficulty producing language but can still understand it. Therefore, the correct option is A) Frontal lobe.

The cerebral cortex is the outermost layer of the brain and covers the cerebral hemispheres, which are the two largest and most prominent structures in the brain. It is responsible for many important functions, such as consciousness, perception, memory, thought, language, and voluntary movement. The cerebral cortex is divided into four main lobes: the frontal lobe, parietal lobe, temporal lobe, and occipital lobe. Each lobe has its unique functions and plays a vital role in the overall functioning of the brain. Therefore, option D is the correct answer.

The primary auditory cortex is located in the temporal lobe of the brain. It is responsible for processing auditory information and plays a crucial role in speech perception, sound localization, and the discrimination of different types of sounds. The auditory cortex receives information from the ears via the thalamus and processes this information to allow us to make sense of the sounds in our environment. Damage to the primary auditory cortex can result in various auditory processing disorders such as difficulty understanding speech, sound localization problems, and tinnitus.

At resting membrane potential, the axonal membrane of a neuron is nearly impermeable to sodium ions. However, the membrane is permeable to potassium ions. The resting membrane potential is the electrical potential difference between the inner and outer surfaces of the axonal membrane when the neuron is not transmitting any signals. This potential difference is maintained by the selective permeability of the axonal membrane to different ions, which is controlled by ion channels and ion pumps. The resting membrane potential is important for the normal functioning of neurons, and any disturbance in this potential can lead to neuronal disorders.

Nissl’s granules are present in both non-myelinated and myelinated neurons. These granules are clusters of rough endoplasmic reticulum (ER) and free ribosomes in the cell body of the neuron. They play an important role in protein synthesis, which is essential for the survival and function of the neuron. On the other hand, myelin forming Schwan cells are only present in myelinated neurons, where they wrap around axons to form the myelin sheath. Nodes of Ranvier are only present in myelinated neurons and are the points between two adjacent myelin sheaths where the axon is exposed.

Magnetic Resonance Imaging (MRI) is a technique used to obtain detailed images of the brain and other parts of the body. MRI uses strong magnetic fields and radio waves to produce images of the body's internal structures. In the case of the brain, MRI can show the structure of the brain and identify areas of damage or abnormalities. Other techniques, such as EEG, fMRI, and PET, can provide information about brain function, but MRI is specifically used to visualize the structure of the brain. MRI is a non-invasive and relatively safe procedure, but it can be expensive and time-consuming.

Nissl's granules are specialized structures found in the cell body of neurons. They are clusters of ribosomes, which are responsible for synthesizing the proteins required for the normal functioning of the neuron. The cell body also contains other organelles, such as mitochondria and Golgi apparatus, which are involved in cellular metabolism and protein trafficking. The dendrites and axons of neurons are primarily involved in receiving and transmitting signals, respectively, and do not contain Nissl's granules. The presence of Nissl's granules in the cell body helps to distinguish neurons from other types of cells in the nervous system.

The cerebrum forms a major part of the human brain. It is divided into two halves, left and right cerebral hemispheres, which are connected by the corpus callosum. The cerebrum is responsible for a variety of functions, including conscious thought, sensory perception, voluntary motor control, and language. It is also involved in memory, emotion, and learning. The cerebral cortex is the outer layer of the cerebrum and is responsible for the complex processes of perception, thought, and action.

Chemical synapses are characterized by the slow transmission of impulse in one direction only. These synapses are commonly found in the neural system and involve the release of neurotransmitters. However, multidirectional impulse transmission is not a feature of chemical synapses.