Which body movement is an example of a second-class lever? A. Knee extension B. Elbow flexion with biceps curl C. Plantar flexion (raising on toes) Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 2: Biomechanics of Resistance Exercise DCO Code: 1.C2 NOTE: Image is for illustration purposes, not needed to answer the question.Use something that shows lever concepts broadly without isolating plantar flexion.

Type II muscle fibers have higher resting concentrations of which molecule compared to Type I fibers? A. Creatine phosphate (CP) B. Myoglobin C. Mitochondria Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter Chapter 3: Bioenergetics of Exercise and Training DCO Code: 1.E1 NOTE: Image is for illustration purposes, not needed to answer the question.

PROGRAM-VETTING: A coach designs a bench press program using linear elastic bands looped over a barbell. As the athlete presses, the band stretches and resistance increases (accommodating resistance). The coach claims this better develops lockout strength. Is this biomechanically sound? A. No; elastic resistance increases in positions where the joint is strongest, but also shortens fastest, reducing time under tension B. Yes; elastic resistance increases as the joint approaches full extension, matching where shoulder extensors are mechanically strongest C. No; elastic resistance provides least resistance early in the range where muscles are weakest, opposite of the human strength curve Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 2: Biomechanics of Resistance Exercise DCO Code: 1.C2 NOTE: Image is for illustration purposes, not needed to answer the question.

Which two types of myofilaments are primarily responsible for muscle contraction? A. Actin and myosin filaments B. Collagen and elastin fibers C. Keratin and tropomyosin strands Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 1: Structure and Function of Body Systems DCO Code: 1.A1 NOTE: Image is for illustration purposes, not needed to answer the question.

An endurance athlete undergoes 12 weeks of high-volume aerobic training. Which cardiovascular adaptation would most improve oxygen delivery to Type I muscle fibers during submaximal exercise? A. Increased stroke volume, delivering more oxygenated blood per heartbeat B. Increased capillary density around Type I fibers, reducing diffusion distance for oxygen C. Decreased arteriovenous oxygen difference, reducing metabolic demand Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 1: Structure and Function of Body Systems DCO Code: 1.G1 NOTE: Image is for illustration purposes, not needed to answer the question.