Cardiac muscle cells produce more force when _____.   A they have already shortened to less than half of their resting length when they are stimulated   B more calcium is released into the fluid around their actin and myosin filaments   C they are stimulated to contract before their refractory period has ended   D more acetylcholine is released from nearby neurons

Q: In muscle contraction, when nervous stimulation ___, it causes Ca2+ to be ___ the sarcoplasmic…

A: The muscle contraction is depends on the interaction of actin (thin filament) and myosin (thick…

Q: Which of these statements is true about leg muscle fibers from an Olympic sprinter versus an Olympic…

A: The movement of the limbs is mainly due to the contraction and relaxation of the muscle fiber. The…

Q: Predict the consequences if cardiac muscle could undergo tetanic contraction

A: Tetanic contraction is referred to as the muscle contraction in which the motor nerve in the…

Q: what does wave summation & treppe occur whe

A: Wave summation- In rapid successions, the stimulus is applied before the relaxation phase of the…

Q: Muscles with pacemakers are unique in that they have __.     motor neurons in the brain and spinal…

A: Muscles need innervation to work—and even to keep up muscle tone, staying away from atrophy. In the…

Q: Both skeletal and (contractile) heart muscle cells ____.   A Have unstable resting membrane…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: Considering the force of contraction of a skeletal muscle fiber,wave summation occurs because ofa.…

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of myosin and…

Q: The muscles of a professional sprinter are most likely to have ________.a. 80 percent fast-twitch…

A: Skeletal muscles can be grouped into fast and slow fibers based on how quickly they can contract and…

Q: Muscle Fiber Types 2 If a type I fiber and a type Il fiber of the same size are stimulated side by…

A: The muscular system is an organ system consisting of smooth, skeletal, and cardiac muscles. Its…

Q: What does it mean when we say cardiac muscle contraction is a graded contraction?

A: Contractions of the heart (heartbeats) are controlled by specialized cardiac muscle cells.

Q: Why do the cardiac muscle cells demonstrate a UTORHYTHMICITY

A: Cardiac muscle cells are short in dimension when compared to the skeletal muscles with small…

Q: Which of the following is true concerning the role of Calcium in the contraction of muscle- cells?…

A: A muscle is a smooth tissue in animals. On the basis of structure, contractile properties and…

Q: Which of the following is true of cardiac muscle? O a. Cardiac cells are electrically connected via…

A: Muscular tissue consists of cells called muscle fibers that are specialized for contraction. Based…

Q: Put the following in order to accurately follow the sequence of events associated with muscle fiber…

A: Relaxing of muscle filaments starts with the motor neuron, which stop delivering its compound sign,…

Q: Match each description to the correct phase of a muscle twitch 73. Sección Ca2+ transported back…

A: Muscle contraction happens when the slender actin and thick myosin fibers slide past one another. It…

Q: The action potential of skeletal muscle                 A. is not essential for contraction.…

A: Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control.

Q: Put the steps of excitation-contraction in order: 1 Myosin "heads" pivot, cause [ Choose ] Calcium…

A: The mechanism of contraction of skeletal muscle was best explained through 'sliding filament…