1. Biot’s respiration named after Camille Biot is an abnormal ataxic breathing pattern, where rapid series of shallow respiration are followed by a period of apnea. In order to known how AMP kinase, knock down leads to Biot respiration in mice; it is necessary to known how AMP kinase affects respiratory rate. AMP kinase is a metabolic sensor and is activated in response to stretching of the lung alveolar cells and other stressors. During respiration, the lung goes through cycles of expansion and contraction (Budinger et al., 2008). When the alveolar cells stretch during expansion, the 5′ AMP-activated ...
Essays on Ion Channels
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Question 1: Uses the correct term for chronically recurring seizures.
Answer: Epilepsy Question 2: Determines if the patient in the scenario has epilepsy. Answer: J.G. does not have epilepsy. She has only had three previous cases of seizures prior to which she had not experienced any seizures. The current cases were triggered by the cesarean section thus too early to refer to the condition as epilepsy (Ko, 2016).
Question 3: Identifies possible conditions, besides brain injury, that contributes to the lowered seizure threshold for the patient in the scenario.
Answer: Apart from brain injury, lowered seizure threshold can occur as a result of infectious illnesses such as AIDS, meningitis as well as developmental disorders such as neurofibromatosis and autism (Ko, 2016).
Question 4: Describes the pathophysiology of a seizure.
The brain and the nervous systems functions within a ...
Muscle contraction is a very important activity that enables an organism perform various bodily movements and flexible actions, in response to nerve stimuli. Muscle fibers are multinucleated long cylindrical cells that have an outer membrane called sarcolemma, and are mainly composed of contractile elements called myofibrils (Dougherty, 2016). Myofibrils are made up of repeating units called sarcomeres. Sarcomeres in turn are composed of (thin) actin and (thick) myosin protein filaments called myofilaments (Dougherty, 2016). The muscle fiber structure and organization is shown in Fig 1.
Contraction Mechanism – Sliding Filament Theory
According to the sliding filament theory, during contraction myosin filaments remain constant in length, ...
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