Blog

 In lab you completed a muscle physiology experiment.  This is a sample screenshot of data collected during the muscle fatigue experiment.  Use it to answer the questions below. 1. Which fatigued more? The nerve or the muscle?    2.  What does this tell you about the role of the CNS in muscle activity (i.e. motivation, music,) and the  brain’s ability to continue working out? (resist fatigue)   3. How might exercising when fatigued play a role in injury?    4. List 2 specific causes of muscle fatigue.

Questions 5 & 6 are related to the following case: A 22-year-old athlete is experiencing muscle weakness and fatigue. Lab results show elevated intracellular calcium levels and decreased ATP levels in muscle cells. Genetic testing reveals a mutation in a P-type ATPase. BCH4024 OC F25 E2 Q5: Which of the following best describes the transporter likely affected in this patient?

BCH4024 OC F25 E2 Q30: A 1 year-old male has poor feeding, lethargy, and seizures. Lab tests show elevated levels of α-ketoglutarate and decreased levels of succinyl-CoA. You suspect a problem with the citric acid cycle and think he MOST likely has a deficiency of:

BCH4024 OC F25 E2 Q33: Which vitamin is a precursor for the coenzyme NAD+, involved in redox reactions?

Questions 9 & 10 are based on the following case: A 24-year-old patient presents with asthma-like symptoms. She is administered a β₂-adrenergic agonist. Her symptoms improve rapidly. BCH4024 OC F25 E2 Q9: Which receptor type is directly activated by the β₂-adrenergic agonist?

BCH4024 OC F25 E2 Q37: Which of the following would most likely occur if succinate dehydrogenase activity were inhibited?

BCH4024 OC F25 E2 Q11: Which second messenger is produced by phospholipase C activation?

10. Which of the following is LEAST likely to be a purpose of submaximial graded exercise testing?

Bartolome De Las Casas:

The author of An Indigenous Peoples History of United States: