Bad Fish: a Case on Nervous Tissue

Bad Fish: A Case on Nervous Tissue Short Answer Questions 1. Define the following phrases and terms associated with the signs and symptoms of Dr. Westwood’s TTX poisoning: - diaphoresis- the phenomenon of profuse or heavy sweating - motor dysfunction- is the abnormal, disturbed or impaired functioning of a muscle, nerve, or center that affects or produces movement, is presented. - paresthesias- is a sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect. - cyanotic- is the appearance of a blue or purple coloration of the skin or mucous membranes due to the tissues near the skin surface having low oxygen saturation - hypoventilating- “respiratory depression” - occours when ventilation is inadequate to preform needed gas exchange. - bradycardia- is a slower than normal heart rate. - gastric lavage- “gastric irrigation”- the process of cleaning out the contents of the stomach - oxygen saturation- the concentration of oxygen in the blood.

2. Voltage-gated sodium ion channel is a protein that allows sodium ions to flow down their electrochemical gradient across the cell membrane. Like other proteins, ion channels are made of amino acids. It functions in the generation and propagation of action potentials down axons. 3. Resting potential is generated by cells having ion transporters, that create the electrical charge 3 Na+ out and 2 K+ in. This creates a charge difference across the cell membrane. It also expends ATP which has to be generated somewhere else by either oxidative metabolism or breaking down other compounds. 4. When a neuron is generating a action potential it is becoming depolarized and then the neuron experiences repolarization. The phases of an action potential are 1. Resting Potential: Vm = -65mV 2. Rising Phase: Vm = 40mV; Rapid depolarization of the membrane. 3. Overshoot: When the inside of the neuron is positively charged with respect to the outside of the membrane. 4. Falling...