Which of the following describes a stretch reflex?A. The receptor detects that a muscle is stretched, and sends a signal to contract it reflexively.B. The receptor detects that a muscle is contracted, and sends a signal to stretch it reflexively.

Q: How do brainstem upper motor neurons regulate movement? a. This system utilizes a central pattern…

A: The term Upper motor neurons (UMNs) was given by William Gowers in 1886. It exists in the cerebral…

Q: Select one or more: - a. No tension can be generated. b. Both contractile and elastic forces…

A: Stretching helps to keep our muscles flexible, strong, and healthy, and its very much needed for…

Q: Which arrangement best describes a bipennate muscle?a. The muscle fibers feed in on an angle to a…

A: A muscle can be defined as the soft tissue present in the body of most animals acting as a source of…

Q: Delayed onset muscle soreness (DOMS) is most closely associated with which type of muscle actio a.…

A: It is experienced by many and characterized by pain and stiffness in muscle.

Q: Sensory impulses from spindles of a stretched muscle could inhibit antagonistic muscles by :-a-…

A: The nervous system plays a major role in transmitting the reflexes from the tissues to the brain.…

Q: Describe the general anatomical design of a muscle spindle and discuss its physiological function.

A: Muscle spindles are a special type of sensory receptors (proprioceptors) present inside the muscle…

Q: When we increased the frequency, why could we see an in increase in the force of contraction? Is it…

A: An action potential can be defined as a rapid increase and decrease in the membrane potential of the…

Q: Which of the following represents the maximal amount of musclecontraction?a. tetanusb. tonec.…

A: Muscle contraction can be defined as the process in which there is a shortening of the muscle and an…

Q: Which of these events occurs during the lag (latent) phase of musclecontraction?a. cross-bridge…

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

Q: What is an example of a muscle that is not part of an antagonistic pair?

A: A muscle is considered as a soft tissue present in most animals and Humans. The muscle is mesodermal…

Q: Sherrinton proposed the law of reciprocal innervation in the muslces. Which of the following is the…

A: Reciprocal innervation This refers to the motor neuron activity principle, which explains that when…

Q: Could you think of two conditions that can disrupt muscle contraction and results in paralysis?…

A: Introduction: The muscle contraction occurs in the below-mentioned steps: The muscle contraction…

Q: *When dynamic y-motor neurons are activated at the same time as a-motor neurons to muscle,

A: When dynamic y—motor neurons are activated at the same time as a—motor neurons to muscle, a prompt…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: Which statement(s) about human neuromuscular innervation is/are true? A. A single spinal motor…

A: A chemical synapse between a motor neuron and a muscle fibre is known as a neuromuscular junction.…

Q: Explain why some domesticated birds, like turkeys andchickens, have mostly fast-twitch fibers in…

A: A muscle fiber is a bundle of cylindrical shaped structure found in the muscle. Their primary…

Q: While initial control of skeletal muscles occurs with the motor cortex, a successful movement also…

A: The motor movements required coordination of central nervous system that controls the muscle…

Q: What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?…

A: Muscle contraction is the activation and formation of tension sites with muscle fibres, while muscle…

Q: What is a synaptic knob?a. receptor for neurotransmitter in the neuromuscularjunctionb. membrane sac…

A: membrane sac holding the neurotransmitter

Q: The figure below shows the muscle tension (Y axis) following the application of stimuli to the…

A: The muscular tension (Y axis) after applying stimuli to the muscle fibre is depicted in the picture…

Q: Muscle tone is: a. the result of voluntary shortening of the muscle. b. the result of a small amount…

A: Muscle tone is define as the contraction of muscle at rest Conditions

Q: How are motor neurons involved in muscle contractions? Select all that apply. The release of calcium…

A: It is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord and…

Q: if, in a laboratory, a skeletal muscle cell receives a single stimulus to contract, it produces a…

A: As per our honor code, we are authorized to answer only one question at a moment. So, we are…

Q: The drug Botox prevents wrinkles by preventing muscles from contracting. Specifically, it prevents…

A: Botulinum toxin is a neurotoxic protein produced by the bacterium Clostridium botulinum.

Q: The series-elastic component of muscle contraction is responsible for a.increased muscle shortening…

A: Muscle is a delicate tissue found in many creatures, and is one of the four fundamental creature…

Q: What type of motor neuron stimulates skeletal muscle fibers to contract by the…

A: Electrochemical action in skeletal muscle fibers causes myofilament movement. Excitation-contraction…

Q: According to Libet’s study, what is the order of events in a voluntary movement?A. People form an…

A: Free movement is the manifestation of thinking by action. This mechanism involves almost all parts…

Q: You cut the axon of a single motor neuron innervating the biceps muscle. Which of the following is…

A: Motor neurons, often referred to as efferent neurons are the type of neurons responsible for…

Q: When you “max out” on reps or pushups or something like that, what kind of stimulus is your brain…

A: Exercise builds and strengthens muscles, which can protect the bones from injury, and support and…

Q: Imagine that you decide to make a move. To make this decision, neurons in your brain's cerebral…

A: a ) In which part of the brain is neuron A located ? The neuron A is located in the dorsolateral…

Q: The Interstitial Cells of Cajal (ICC) generate "slow waves" which refer to O A. slow action…

A: Option:B   phasic contractions

Q: A half-second stimulation in the motor cortex produces what kind of result?A. Isolated muscle…

A: Introduction: The soft tissue present in almost all mammals is the muscles. The muscle cells…

Q: At a normal NMJ, action potentials in the skeletal muscle cell can be blocked directly by? O A.…

A: Neuromuscular junction  - It is a chemical synapse between a motor neuron and muscle fiber. It…

Q: What do skeletal muscle contractions share in common with smooth muscle contractions?a. Both types…

A: The skeletal muscles are a form of striated muscle under voluntary control of the somatic nervous…

Q: Which statement CORRECTLY describes a motor unit? O a. A single muscle fibre plus all the motor…

A: The muscle fibers are functionally organized as the motor units. All the varied reflexes and the…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.