. A lesion with a bright signal on a DWI means that a. astrocytes and microglia are [proliferating to repair damage b. chronic atrophy (cell loss or shrinkage) is present c. the extracellular area has ex[anded due to neuronal death d. none of these are true

Q: 10. The image to the right illustrates a What process is occurring? portion of a neuron.

A: Neurons are the sensory organ that helps to carry senses from one portion to another portion. they…

Q: 4 . A 2-year-old child presents to the pediatric oncology clinic with newly diagnosed…

A: Retinoblastoma is a cancer that affects the eye. It begins in the retina, in the back portion of the…

Q: 3. What effect would pre-synaptic injection of the Ca²+ chelator EGTA have on a nanodomain vs. a…

A: The presynaptic terminal is at the end of an axon and is the place where the electrical signals that…

Q: We have the following DNA sequence that codes for 7 amino acids of exon 1 of the dopamine receptor…

A: Here the DNA sequence is - 5' GTG CAC CTG ACT CCT GAG AAG 3' It codes 7 aminoacids.  The…

Q: he resting potential of a neuron is characterized by: A. High potassium concentration outside the…

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: Which of the following is correct for signaling within a neuron? 1) action potentials stimulate…

A: Normally due to the operation of Sodium Potassium pump the inside of the membrane remains negative…

Q: 3. Compare the electrophysiology of two neurons, Neuron A and Neuron B. Neuron A has a greater…

A: Neuron A has greater membrane resistance and lower internal resistance, while Neuron B has low…

Q: Damage to the axons in the spinal cord is typically permanent and debilitating. One promising avenue…

A: Neuroglial cells are nonexcitatory supporting cells that are present in both central(CNS) and…

Q: 3. Which structure sends impulses to the body of the nerve cell? Choose one: a. Dendrite b. Axon c.…

A: The nervous system controls the activity of what takes place inside and outside the body. The way…

Q: 6. Which of the following choices is CORRECT? A. cerebrospinal fluid (CSF) is synthesized in the…

A: Cerebrospinal fluid is a clear and colorless body fluid found in the brain and spinal cord. The…

Q: 11- One of the following is not a structural feature of neuron. A. Dendrites B. Node of Ranvier C.…

A: Neurons are the structural and functional unit of nervous system. They are used to transmit impulse…

Q: 4 When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic…

A: Neurotransmitters are specific chemical substances that are synthesized and released from the…

Q: Which of the following is the key driver for the fusion of neurotransmitter-containing synaptic…

A: Neurotransmitters are the chemicals secreted by the neuron to send a message to another cell; it…

Q: 16. The node are the area on the axon which A. Have no myelin sheath B. Have no cytoplasm C. Do…

A: A neuron, also known as a nerve cell, is a central component of the nervous system that transmit…

Q: 9. All of the followings are incorrect about the Graded Potential, except A. It spreads…

A: We know that Graded potential refers to the receptor potential that occurs due to an external…

Q: 9. Which of the following statements about the regeneration of nerve fibers is incorrect?  a. PNS…

A: Neurons and nerve glial cells form a large network in the body that helps in the coordination of the…

Q: The CNS is made of the: A. Sensory and motor neurons B. Brain and spinal cord C. Spinal nerves D.…

A: Nervous system is the complex system in our body which controls the entire body and coordinates the…

Q: 14. The action potential in excitable cells is ‘activated’ when the cell membrane reaches the…

A: The action potential is a phenomenon of excitable cells such as nerve and muscle and consists of a…

Q: Neurotransmitter actions are quickly terminated. Which of the following is not a mode of…

A: The neurotransmitters are released in case of synaptic transmission by chemical synapse. The…

Q: In the knee-jerk reflex arc, the synapse between a sensory neuron and a motor neuron occurs where?…

A: Neurons- are electrically excitable cells that transmit impulses to and from the brain. They…

Q: A neuroendocrine cell is best described as... A. A neuron that releases a neurotransmitter into a…

A: Neuroendocrine cells are specialized cells that are found throughout the body and have the ability…

Q: What statement best describes the "threshold potential" of a neuron? a. It is the equilibrium…

A: The neuron is the chief component and the basic unit of the nervous system in advanced organisms.…

Q: 2. A neurotransmitter works A. In the axon B. On the presynaptic membrane C. On the postsynaptic…

A: A neurotransmitter is a molecule that transfers the signal from one neuron to another so, it is…

Q: What side effects would you worn Audrey to be aware of based on the role of Calmodulin in muscle…

A: Calmodulin is an intracellular polypeptide that upon binding with calcium ions triggers the…

Q: 20. The presence of cholinesterase in the human nervous system allows a. One way impulse…

A: Cholinesterase in neuronal cells is an enzyme that plays an important role in the propagation of…

Q: 10) Nicotinic receptors are a. G-protein coupled receptors b. Ligand-gated ion channels c.…

A: Receptors are specialized proteins found on the surface of cells or within cells that are…

Q: 4. Which of the following cells contains a very large amount of myosin and actin filaments? A. Red…

A: Cells are the basic unit of life and it constitutes different organelles and structures that are…

Q: A. Inhibitory interneurons. B. Second messenger pathways. C. Coincidence detection. D. None of the…

A: There are neural processing strategies like inhibitory neurons, coincidence detection, second…

Q: Nuclei within the _______ contain the cell bodies of the neurons responsible for sending…

A: Nervous system is the network of nerve cells and fibers which transmits nerve impulses between whole…

Q: Suppose you depolarize an axon midway between its initial segment and its terminus. А. In which…

A: Depolarisation of axon:  This occurs when the Sodium ions rapidly rush inside the neuron via…

Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.