One of your friends has anemia. They consistently complain of higher levels of fatigue when you go for runs or exercise. What is the cause of this? Decreased muscle spindle activation of the gastroc Increased use of fast twitch muscle fibers Decreased oxygen carrying capacity of myoglobin Decreased oxygen carrying capacity of hemoglobin

One of your friends has anemia. They consistently complain of higher levels of fatigue when you go for runs or exercise. What is the cause of this? Decreased muscle spindle activation of the gastroc Increased use of fast twitch muscle fibers Decreased oxygen carrying capacity of myoglobin Decreased oxygen carrying capacity of hemoglobin

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter16: The Body's System

Section: Chapter Questions

Problem 22RQ: Which component is responsible for initially stimulating a muscle contraction? a. proteins b....

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Similar questions

Why do you think a person is able to perform anaerobic exercise (such as lifting and holding a heavy weight) only briefly but can sustain aerobic exercise (such as walking or swimming) for long periods? (Hint: Muscles have limited energy stores.)
Cheetahs and human sprinters tend to have a high proportion of ________fibers in their leg muscles. a. white b. fast red c. slow red
Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the above
Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sites
The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament
After death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.
Depolarization of the sarcolemma means ________. the inside of the membrane has become Less negative as sodium ions accumulate the outside of the membrane has become less negative as sodium ions accumulate the inside of the membrane has become more negative as sodium ions accumulate the sarcolemma has completely lost any electrical charge
The diaphragm is a ______ muscle. a. smooth b. skeletal c. dome-shaped d. a and c
Which component is responsible for initially stimulating a muscle contraction? a. proteins b. electrochemical signals c. plasma membranes d. striations
Which of the following statements describes smooth muscle cells? They are resistant to fatigue. They have a rapid onset of contractions. They cannot exhibit tetanus. They primarily use anaerobic metabolism.
One of your friends has anemia. They consistently complain of higher levels of fatigue when you go for runs or exercise. What is the cause of this? Decreased oxygen carrying capacity of myoglobin Decreased muscle spindle activation of the gastroc Increased use of fast twitch muscle fibers Decreased oxygen carrying capacity of hemoglobin
Which of the following step(s) about the excitation of skeletal muscle is/are incorrect? 1. Acetylcholine is released and binds to motor end plate receptors 2. An action potential is created and moves down T-tubules 3. Calcium is released from the sarcoplasmic reticulum 4. Calcium ions bind to tropomyosin to shift troponin off the binding sites for cross-bridging 5. Myosin forms cross-bridges and binds with actin to pull it towards middle of sarcomere