Podcast
Questions and Answers
Myofibrils contain:
Myofibrils contain:
- Contractile proteins
- Regulatory proteins
- Structural proteins
- All of these answers are correct. (correct)
Which of the following structures consists of a somatic motor neuron and all the skeletal muscle fibers it stimulates?
Which of the following structures consists of a somatic motor neuron and all the skeletal muscle fibers it stimulates?
- Neuromuscular junction
- Sarcomere
- Muscle unit
- Motor unit (correct)
Increasing the number of active motor units within a skeletal muscle is called:
Increasing the number of active motor units within a skeletal muscle is called:
- Wave summation.
- Muscle tone.
- Motor unit recruitment. (correct)
- Flaccidity.
Which of following is a common characteristic of fast glycolytic (FG) skeletal muscle fibers?
Which of following is a common characteristic of fast glycolytic (FG) skeletal muscle fibers?
Smooth muscle cells differ from skeletal and cardiac muscle cells in that:
Smooth muscle cells differ from skeletal and cardiac muscle cells in that:
Skeletal muscle cells are generally multinucleate because:
Skeletal muscle cells are generally multinucleate because:
Which of the following proteins is used to reinforce the sarcolemma and to help transmit the tension generated by the sarcomeres to the tendons?
Which of the following proteins is used to reinforce the sarcolemma and to help transmit the tension generated by the sarcomeres to the tendons?
Skeletal muscle contraction will continue to occur as long as which of the following chemicals are available in the cytosol of the muscle fiber?
Skeletal muscle contraction will continue to occur as long as which of the following chemicals are available in the cytosol of the muscle fiber?
The benefit of the creatine phosphate is that:
The benefit of the creatine phosphate is that:
If people are given an acetylcholinesterase inhibitor, they are likely to:
If people are given an acetylcholinesterase inhibitor, they are likely to:
Calcium is used to trigger cross-bridge formation during which phase of muscle contraction?
Calcium is used to trigger cross-bridge formation during which phase of muscle contraction?
While performing pull-ups, a person slowly lowers themselves from the "up" position. This is an example of:
While performing pull-ups, a person slowly lowers themselves from the "up" position. This is an example of:
Which of the following types of muscle tissue contract(s) when excited by its/their own autorhythmic muscle fibers?
Which of the following types of muscle tissue contract(s) when excited by its/their own autorhythmic muscle fibers?
Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction?
Which of the following correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction?
In skeletal muscles, the combined amounts of creatine phosphate and ATP provide enough energy for the muscle to contract maximally for approximately:
In skeletal muscles, the combined amounts of creatine phosphate and ATP provide enough energy for the muscle to contract maximally for approximately:
To stimulate skeletal muscle contraction, acetylcholine must cross the __________ of the neuromuscular junction and bind to receptors on the motor end plate.
To stimulate skeletal muscle contraction, acetylcholine must cross the __________ of the neuromuscular junction and bind to receptors on the motor end plate.
Which is a correct sequence of events in the onset of rigor mortis?
Which is a correct sequence of events in the onset of rigor mortis?
In a neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to:
In a neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to:
Which of the following are commonly used to produce ATP during skeletal muscle contraction?
Which of the following are commonly used to produce ATP during skeletal muscle contraction?
Which of the following is also referred to as the period of lost excitability in skeletal muscle fibers?
Which of the following is also referred to as the period of lost excitability in skeletal muscle fibers?
