After exerting yourself, you start to experience fatigue, pain, and muscle shaking. Which of the following is most likely the cause of your fatigue after hours of constant exertion? 

Which of the following is a part of the excitation-contraction coupling in cardiac muscle? 

What is a glycerol with 3 fatty acids attached to it called? 

True or false: Dr. Hansen’s dad is at his favorite restaurant (Chuck-A-Rama [not kidding]). He is hungry but notices that the line to the bathroom is quite long. He really hates to wait to defecate (who doesn’t?) and decides to not eat his food quite yet. Dr. Hansen’s dad believes that eating food triggers your urge to defecate. Is this true or false?

 In a healthy heart, pacemaker cells in the ________ primarily regulate cardiac autorhythmicity. 

Which of the following occur during growth hormone signaling?

Why can cytotoxic T-cells kill infected cells in adaptive immunity?

Which of the following would result in feminization?

You get poisoned with tetrodotoxin (a neurotoxin found in fish) after eating puffer fish that blocks voltage-gated sodium channels. Which of the following would occur in response to your accidental poisoning? (We are all pulling for you.)

During coordinated muscle movement, you must have an orderly recruitment of motor units. The size principle allows for the orderly recruitment of motor units. How does an EPSP coming from a single neuron to many different motor units only activate those needed for coordinated movement? (Select all that apply.)