Tiêu đề PF - PHYSIOLOGY.docx ✅

PF - PHYSIOLOGY Chapters which triggers a cascade that closes Na⁺ (cGMP- gated) channels. With these channels closed, less positive charge enters, causing the cell to hyperpolarize instead of depolarize. (From chatgpt hehe, i forgot the choices pero i do remember about channel yun) 12 At the onset of exercise, what causes increased ventilation? Neurogenic signals from the motor cortex simultaneously excite the muscles and the respiratory center. 13 A postsynaptic neuron receives multiple excitatory inputs, but an inhibitory input prevents it from reaching threshold and generating an action potential. What is this process called? (nonverbatim) a) Temporal Summation b) Presynaptic Facilitation c) Reverse(?) Inhibition d) Summation c) Reverse(?) Inhibition 14 What is the immediate effect of severe hypoventilation on arterial blood gas levels A. Increased PO2 and Decreased PCO2 B. Decreased PO2 and Increased PCO2 C. Increased PO2 and Increased PCO2 D. Decreased PO2 and Decreased PCO2 B. Decreased PO2 and Increased PCO2 15 A pilot flying at 20,000 ft without acclimatization suddenly becomes confused and euphoric. What is the most likely cause? B. Arterial oxygen falling below the critical level