When electrically stimulating a skeletal muscle and measuring the force of muscle contraction, which of the following are true? Check All That Apply Increasing the stimulus will increase the muscle contraction force. The recruitment of motor units will increase the muscle contraction force. One weak stimulus will cause an increase in muscle contraction force. Increasing the force will increase the muscle contraction stimulus. Once maximum stimulus has been reached, the muscle will not contract with increased force.

When electrically stimulating a skeletal muscle and measuring the force of muscle contraction, which of the following are true? Check All That Apply Increasing the stimulus will increase the muscle contraction force. The recruitment of motor units will increase the muscle contraction force. One weak stimulus will cause an increase in muscle contraction force. Increasing the force will increase the muscle contraction stimulus. Once maximum stimulus has been reached, the muscle will not contract with increased force.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

We move a lot and do not even realize how intricate these movements may be from gross motor to fine motor manipulations. Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular junction through one complete contraction and relaxation for the sliding filament theory. Don’t forget to include all the major proteins (actin, myosin, troponin and tropomyosin) involved as well as calcium and ATP.
A motor unit associated with the stimulation of skeletal muscle is designated as a 1:8 motor unit. Which of the following statements is correct? The motor unit consists of one somatic neuron and 8 myofibers (muscle fibers) Each of the myofibers in the motor unit is innervated by more than one neuron It is part of the autonomic nervous system The neuron in the motor unit is an afferent neuron
Arrange the steps of muscle innervation and contraction in response to touching a hot plate. appendage is removed from stimulus v movement is produced muslce fibers work together to produce action muscle contraction occurs and the sarcomere shortens Myosin heads bind thin filament Calcium binds troponin Calcium is released T tubules carry the action potential to the sarcoplasmic reticulum Action potential is generated in the sarcolemma as a result of opened sodium channels The presynaptic cell releases acetylcholine Signal arrives at the neuromuscular junction Sensory receptors detect uncomfortable heat Afferent neurons carry impulse to the central nervous system Signal reaches the reflex arc in the central nervous system and is directed out through the anterior horn Signal travels through the motor units > |> > > |> > > > > > > > >
If Ca2+ pumps of the sarcoplasmic reticula fail to function, what will happen to the tension generated in a single muscle fiber when it is excited? increase in tension decrease in tension no change in tension
Using pyramidal motor tract as a template, describe the voluntary control of skeletal muscles being sure to use appropriate course terminology. Start from the very first neuron and end with neural innervation onto muscle fiber.
How many muscle fibers can be controlled by one motor neuron? Group of answer choices 6 All of above 2000 500
The following is an oscilloscope tracing displaying the muscle twitch of an intact, viable frog skeletal muscle. The muscle was stimulated via electrodes placed on the muscle at time zero and again at 75 msec. Which of the following physiological phenomena does this demonstrate? Force 0 20 treppe fatigue fused tetanus wave summation 120 Time (msec) 2015 a 180 200
Which of the following is thought to be cause of muscular fatigue? Decrease level of lactate within the muscle cell Decrease level of extracellular potassium outside of muscle cell Increased level of acetylcholinesterase in the synaptic cleft Increase level of intracellular ATP within muscle cell Increase level of phosphate within muscle cell
Muscle spindle structures consist of: Extrafusal muscle fibers and gamma motor neurons Extrafusal muscle fibers and alpha motor neurons Golgi tendon organs and gamma motor neurons Intrafusal muscle fibers and gamma motor neurons
Which of the following are part of the muscle contraction process?(More than one answer may be correct, please aid in answering) Question 5 options: ATP binds and detaches myosin head from actin GTP is hydrolyzed to GDP + P Acetylcholine released into neuromuscular junction by motor neurons Prolactin stimulates the reuptake of ATP. Ca2+ binds to troponin which moves tropomyosin away from actin
When motor units are recruited to participate in tension development in a muscle, the order of recruitment is typically: Question 13 options: from slow twitch to fast twitch from fast twitch to slow twitch it depends on the type of contraction related to the size and shape of the muscle
Match the following types of contractions: The stimulus above which no stronger contraction can be elicited, because all motor units are firing in the muscle Determined by alternating motor units of a muscle organ even when the muscle is at rest Continued sustained smooth contraction due to rapid stimulation The situation in which contractions become stronger due to stimulation before complete relaxation occurs How a smooth increase in muscle force is produced [Choose] [Choose ] [Choose] [Choose] [Choose]