TLDR;
This video is a recording of an interactive MCQ (Multiple Choice Questions) practice session on the nervous system, conducted by Career Dishari Academy. The session includes 50 questions, with the instructor providing explanations and analyses of the answers. The instructor encourages students to actively participate by answering questions in the comments and keeping track of their scores. The session covers various topics related to the nervous system, including the functions of different nerves, brain structures, and neurological disorders.
- The session covers 50 MCQs on the nervous system.
- The instructor provides detailed explanations and analyses of the answers.
- Students are encouraged to actively participate and keep track of their scores.
- Various topics related to the nervous system are covered, including nerve functions, brain structures, and neurological disorders.
Introduction [0:16]
The instructor welcomes the students to the nervous system MCQ practice session, outlining the format: students answer in the comments with the question number and their chosen option (A, B, C, or D). They should note correct answers and will be asked for their total score at the end. After each question, the instructor will provide a rough analysis and additional information related to the topic.
Parasympathetic Nerve Function [2:37]
The first question asks about the function of the parasympathetic nerve. The instructor explains the division of the nervous system into the central and peripheral nervous systems, with the autonomic nervous system being part of the peripheral system. The autonomic nervous system has two parts: sympathetic and parasympathetic, which are opposite in nature. The correct answer is that parasympathetic nerves decrease glucose levels in the blood. The instructor also mentions other functions and their opposites in the sympathetic system, advising students to memorize these for category two questions (multiple correct answers).
Sacral Spinal Nerves [4:32]
The second question concerns the number of spinal nerves in the sacral region. The instructor mentions that there are a total of 31 pairs of spinal nerves and the correct answer is five. The instructor divides it into cervical, thoracic, lumbar, sacral, and coccygeal. Students are advised to check the positions of the nerves.
Location of Sulcus [5:46]
Question three asks where sulci are found. The instructor explains that sulci are deep grooves in the brain, while the wide folds are called gyri. Both gyri and sulci are located in the brain, specifically in the cerebral cortex or cerebrum.
Origin of CSF [7:35]
The fourth question asks about the origin of cerebrospinal fluid (CSF). The instructor explains that CSF is produced in the choroid plexus. CSF is a transparent, colorless liquid that protects the brain and spinal cord from friction and injury, similar to how water protects vegetables during cooking. The fluid spreads throughout the brain and spinal cord, with the choroid plexus being the origin point.
Nerve for Ocular Muscles [10:32]
Question six asks about the nerve that carries impulses to the ocular muscles. The instructor clarifies that ocular muscles are eye muscles, and the nerve responsible for their movement is the oculomotor nerve, not the optic nerve, which is for vision. The correct answer is option B, oculomotor nerve.
Junction of Two Neurons [13:11]
Question seven asks about the junction between two neurons. The instructor points out a tricky element: the correct term is "synapse," not "synapsis." In Bengali, synapse is called "neural proximity." Synapsis is a different term, also known as sciatic cleft. The correct answer is option A, synapse.
Sense of Smell [16:24]
Question eight asks which nerve is responsible for the sense of smell. The instructor confirms that the olfactory nerve is the correct answer. The instructor also touches on the nature of nerves, whether they are cognitive or active, and how mixed nerves can be tricky in questions.
Longest Cranial Nerve [17:35]
Question nine asks about the longest cranial nerve. The instructor states that the Vegas nerve is the correct answer. The instructor also distinguishes between the longest cranial nerve (Vegas) and the longest nerve in general (sciatic nerve), which runs from the lower back to the legs. The largest cranial nerve is the trigeminal nerve.
Brain Part Regulating Body Temperature [19:48]
Question ten asks which part of the brain regulates body temperature. The instructor confirms that the hypothalamus is the correct answer. The hypothalamus maintains body temperature by balancing heat in winter and promoting cooling through sweating in summer. It also controls the sympathetic and parasympathetic nervous systems, making it relevant for category two questions.
Myelin Sheath Location [22:29]
Question eleven asks about the location of the myelin sheath. The instructor explains that the myelin sheath is located within the axon of a neuron, specifically between the medullary sheath and the neurolemma.
Nerve Cell Division [24:08]
Question twelve asks why nerve cells do not divide. The instructor confirms that the absence of a centrosome is the reason nerve cells do not divide.
Glossopharyngeal Nerve Type [25:19]
Question thirteen asks about the type of nerve the glossopharyngeal nerve is. The instructor explains that it is a mixed nerve (both sensory and motor). To remember the types of cranial nerves, the instructor provides a formula: "Some Say Money Matters But My Brother Says Big Brain Matters Most." By arranging the cranial nerves from 1 to 12 and matching them with S (Sensory), M (Motor), or B (Both/Mixed), students can determine the type of each nerve.
Parkinson's Disease and Nerve Cell Damage [28:34]
Question 14 asks in which organ nerve cell damage is identified in Parkinson's disease. The instructor explains that the substantia nigra is the area affected. The substantia nigra controls movement, speech, and restraint. Parkinson's disease occurs when this area is imbalanced or not working properly, leading to tremors and difficulty with movement and balance.
Temporal Lobe Stimulation [31:48]
Question 15 asks what sensation arises when the temporal part of the brain is stimulated. The instructor confirms that the correct answer is listening. The temporal lobe is located in the auditory center, controlling how much sound is modulated and inserted into the ear.
Presence in Neuroplasm vs. Exoplasm [34:21]
Question 16 asks which component is present in neuroplasm but not in exoplasm. The instructor confirms that Nissl granules are present in neuroplasm but not in exoplasm.
Stimulation Transmission Between Neurons [35:45]
Question 17 asks through what stimulation is transmitted from one neuron to another. The instructor explains that the correct answer is the synaptic knob, also referred to as the "edge proximity".
Cells Supporting the Nervous System [37:16]
Question 18 asks what cells support the nervous system. The instructor confirms that neuroglia are the supporting cells, making up 90% of the nervous system, while neurons make up only 10%. Neuroglia perform supportive tasks for neurons and can act as replacements if a neuron is damaged.
Nerve Carrying Stimulus to CNS [38:46]
Question 19 asks what the nerve that carries a stimulus to the central nervous system is called. The instructor confirms that it is called a sensory neuron or afferent nerve.
Outermost Layer of the Nervous System [40:30]
Question 20 asks for the name of the outermost layer of the nervous system. The instructor confirms that the outermost layer is the epineurium. The middle layer is the perineurium, and the innermost layer is the endoneurium. The instructor uses the analogy of a Kit Kat chocolate bar to help remember the layers.
Brain Part Controlling Emotions [43:04]
Question 21 asks which part of the brain controls emotions such as fear, shame, anger, and sadness. The instructor confirms that the thalamus is the correct answer, referring to it as a relay center for emotions.
Cerebellum Part Of [45:32]
Question 22 asks which part the cerebellum is a part of. The instructor confirms that the cerebellum is part of the hindbrain, also known as the "little brain".
Correct Reflex Arc Path [46:49]
Question 23 asks which of the following is the correct reflex arc path. The instructor explains the reflex arc using the example of touching a hot water bowl. The path is: receptor → sensory neuron → central nervous system → motor neuron → effector (muscle).
Mixed Nerve [50:29]
Question 24 asks which of the following is not a mixed nerve. The instructor confirms that the chest nerve or motor nerve is not a mixed nerve.
Dominant Promoter of Neurons [51:37]
Question 25 asks which is the dominant promoter of neurons. The instructor confirms that the dominant promoter is the axon, which receives the impulse.
Branching off the Axon [52:44]
Question 26 asks what the branch that branches off the axon is called. The instructor confirms that it is called a collateral or axis branch.
Stimuli Transmission in the System [54:02]
Question 27 asks who transmits stimuli in the system. The instructor confirms that modulated neurons are responsible for fast current flow. The instructor explains that modulated neurons have a myelin sheath, which allows for faster impulse transmission through Ranvier's nodes.
Neuron Connecting Sensory and Motor Neurons [57:24]
Question 28 asks what the neuron that makes the connection between sensory and motor neurons is called. The instructor confirms that it is called an adjacent neuron or adjunct neuron.
Acetylcholine Type [58:54]
Question 29 asks what type of substance acetylcholine is. The instructor confirms that it is a neurotransmitter, a chemical substance that modulates nerve impulses from one neuron to another or to a muscle. The instructor provides other examples of neurotransmitters, such as dopamine, GABA, glutamate, and non-epinephrine. The instructor also mentions neurohormones, which are hormones released from nerve cells, such as vasopressin or ADH.
Meeting Place of Dedron [1:02:04]
Question 30 asks what to call the small gap at the meeting place of the dendron. The instructor confirms that the correct answer is the synaptic cleft, also known as the "adjacency method sciatic cleft".
Nerves Supplying Cochlear Nerve [1:03:53]
Question 31 asks what the nerves through which the cochlear nerve is supplied are called. The instructor confirms that they are called sensory neurons.
Inner Part of the Brain [1:04:48]
Question 32 asks what the inner part of the brain is called. The instructor confirms that it is called the cerebral medulla. The outermost layer is the cerebral cortex. The medulla has two parts: gray matter and white matter.
Occipital Nerve Location [1:07:04]
Question 33 asks where the occipital nerve is located. The instructor confirms that it is located in the country of the tail, at the very end of the spinal cord.
Driving or Cycling Reflex Action [1:09:34]
Question 34 asks what kind of reflex action driving or cycling is. The instructor confirms that it is a conditional reflex action, meaning it depends on learning and conditions.
Anatomically Correct Word [1:14:04]
Question 35 asks what the anatomically correct word is. The instructor confirms that the correct answer is Synapse.
Knee Jerk Reflex [1:15:56]
Question 36 asks what type of reflex a knee jerk is. The instructor confirms that it is a habit neutral reflex, also known as innate or unconditional.
Reflexive Verbs [1:18:30]
Question 37 asks what the name given to the nerve impulse that is transmitted in reflexive verbs is. The instructor confirms that it is called a reflex path or reflex arc.
Salivation Nervous System [1:19:33]
Question 38 asks which nervous system causes salivation. The instructor confirms that the parasympathetic nervous system increases saliva flow.
Jaw Muscle Movement [1:21:27]
Question 39 asks which nerve helps move the jaw muscles. The instructor confirms that the trigeminal nerve is responsible for jaw movement.
Spinal Nerve Nervous System [1:23:34]
Question 40 asks which nervous system the spinal nerve belongs to. The instructor confirms that it belongs to the peripheral nervous system.
Cell Body of a Nerve Cell [1:24:52]
Question 41 asks what the cell body of a nerve cell is called. The instructor confirms that it is called a neurocyton.
Medullary Nerve Explant [1:25:41]
Question 42 asks which of the following is not a medullary nerve explant. The instructor confirms that the medulla oblongata is not a medullary nerve explant.
Cell Bodies of Neurons [1:26:29]
Question 43 asks what the cell bodies of neurons form when combined. The instructor confirms that they form nerve ganglia.
Respiratory Rate Control [1:27:23]
Question 44 asks which part of the brain controls the respiratory rate. The instructor confirms that the pons controls the respiratory rate.
Eighth Cranial Nerve [1:28:54]
Question 45 asks which is our eighth cranial nerve. The instructor confirms that the auditory nerve is the eighth cranial nerve. The instructor provides a formula to remember the cranial nerves: "Hey, Apu, come on. And Phatik is singing well, aha."
Ranveer's Episode [1:30:37]
Question 46 seems to be a repeated question.
Reflex Action [1:30:45]
Question 47 asks which one controls reflex action. The instructor confirms that the spinal cord controls reflex actions.
Vomit Reaction [1:31:25]
Question 48 asks which of the following controls the vomit reaction or vomiting reflex. The instructor confirms that the medulla oblongata controls vomiting, coughing, slurring, salivary, and suckling reflexes.
Gray Matter of the Nervous System [1:32:17]
Question 49 asks where the gray matter of the central nervous system can be seen. The instructor confirms that it can be seen in the spinal cord.
Nerve Impulses [1:33:36]
Question 50 asks which one cannot transmit nerve impulses. The instructor confirms that neuroglia cannot transmit nerve impulses.
Conclusion [1:35:17]
The instructor concludes the session, announcing that the next session will cover hormones. The instructor also provides a scoring guide, indicating that those who scored 40 plus are in a good position, those who scored 30 to 35 need to read more, and those who scored below 30 need to study harder.