How does the sarcoplasmic reticulum know when to release Calcium ions instead of continuously pump them into itself?

Q: What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal…

A: Muscles are the tissues able to contract in response to stimuli.

Q: When a sarcomere shortens, which event is associated with this?

A: Introduction: The muscle contraction occurs in the following steps: The head of the myosin…

Q: Describe the structure of a sarcomere. What is its function?

A: Muscles are a group of tissues that contract together to produce a force. It consists of fibers of…

Q: In skeletal muscle contraction, calcium ions apparently act to:   Question 8 options:   a)  block…

A: In skeletal muscle contraction, the thin filaments are pulled which then slide past the thick…

Q: How does the arrangement of myofilaments produce the characteristic striations of skeletal muscle…

A: Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth…

Q: Striated muscle twitch force reaches a maximum after nearly all of the calcium is pumped out of the…

A: The correct answer is:D.) Calcium is the initial switch to turn the actin thin filament on and then…

Q: What is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: What is the time relationship between a skeletal muscle fiber action potential and the resulting…

A: A skeletal muscle is a part of the “muscular system” of our body. A fiber of a skeletal muscle is…

Q: What is the relation of terminal cisternae with the sarcoplasmic reticulum?

A: Introduction: The skeletal muscle fibers are composed of several long and thin cells referred to as…

Q: Which of these is the proper sequence of these events of muscle contraction 1) Action potential…

A: Based on option, the correct order is 1, 3, 4 and 2. Steps in initiating contraction: Whenever…

Q: List the various Myofibril Structures?

A: Myofibrils are made up of proteins organized into filaments. The filaments can be thick filaments or…

Q: What two types of microfilament make up the muscle sarcomere?  Which motor protein is primarily…

A: Filaments are long, thin and flexible structures that can be found in various biological systems.…

Q: What would happen if you accidentally ingested a toxin that completely inhibited the function of the…

A: All the membrane of the cells, as well as their organelle, possess several different types of ion…

Q: 28) the large protein that attaches to myosin and stabilizes it when the sarcomere shortens is: a)…

A: The mechanism muscles contraction is explained by the sliding filament theory . In this myosin (a…

Q: Describe the function and source of calcium ions in initiating contraction in skeletal muscle?

A: We know that Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride,…

Q: Which two structures approach each other at a neuromuscular junction?

A: The neuromuscular junction can be described as communication between a motor neuron and a muscle…

Q: How does the AP in the motor neuron cause calcium release in the muscle fiber?

A: Action potential refers to the depolarisation of neuronal membrane which is required for the…

Q: If you introduced a chemical into a muscle fiber that blocked the voltage-gated calcium channels in…

A: The muscles are the soft tissues found in the animals. They are made up of special types of…

Q: Distinguish between Transverse tubules and sarcoplasmic reticulum?

A: Anatomy is the branch of biology that deals with the study of the structure of organisms and their…

Q: What is the difference between isometric and isotonic contractions?

A: The origin of the muscle is the mesoderm. Muscle is of three types - 1. Skeletal muscle - Voluntary.…

Q: Calcium is the trigger for contraction of all muscle types. How does its binding site differ in…

A: In the human body, there are three types of muscles, skeletal muscles, cardiac muscles, and smooth…

Q: Describe the function and source of calcium ions in initiatingcontraction in skeletal muscle?

A: Introduction  Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride…

Q: What molecule "couples" the action potential to the concentration cycle of the sarcomere? What does…

A: Muscle contraction is a major phenomenon associated with the functioning of the myofibril occurring…

Q: Put these events that occur in skeletal muscle in the correct chronological sequence: 1. Activation…

A: The membrane potential on the T-tubule membrane is sensed by a protein called the dihydropyridine…

Q: Why is the movement of Ca2+ from the sarcoplasm into the sarcoplasmic reticulum classified as active…

A: During muscle contraction, the release of calcium occurs from the sarcoplasmic reticulum. The…

Q: A motor unit associated with the stimulation of skeletal muscle is designated as a 1:8 motor unit.…

A: A motor unit is made up of a motor neuron and the skeletal muscle fibres innervated by that motor…

Q: Which of the following step(s) about the excitation of skeletal muscle is/are incorrect?   1.…

A: Muscle contraction is an example of a complex biological process. The excitation of skeletal muscle…

Q: how does The reabsorption of calcium ions into the sarcoplasmic reticulum by active transport…

A: Calcium ion channels triggers the contraction through the reactions of regulatory proteins and these…

Q: Which of the following can respond to increased stimulation with a graded response: a) motoraxon…

A:

Q: Describe the structure of the sarcomere

A: The Sarcomere is a large protein unit that is essential for contraction in the muscle. Both skeletal…

Q: How are the terminal cisternae related to the sarcoplasmic reticulum?

A: Introduction: The skeletal muscle fibers are composed of several long and thin cells referred to as…

Q: What happens if calcium ions are not transported back to the sarcoplasmic reticulum

A: Neural signal on reaching neuromuscular junction release a neurotransmitter named acetylcholine.…

Q: How is resting membrane potential established in a neuron and muscle cell?

A: The neuron of the nervous system and muscle cells all can maintain a resting membrane potential.…

Q: Where would you expect to find the greatest concentration of calcium in resting skeletal muscle ?

A: The human and other vertebrates contain three important muscle types, such as skeletal muscle,…

Q: How is the response to excitatory stimuli turned off at the neuromuscular junction?

A: Introduction An excitatory transmitter stimulates the production of an electrical signal known as an…

Q: Acetylcholinesterase is an important molecule in the engine end plate to share: a) stimulates…

A: Introduction:  Acetylcholinesterase is primary cholinesterase in body. It is also known as AChE or…

Q: Which myofilaments have binding sites for calcium? What specific molecule binds calcium?

A: When sarcomeres contract, the thin myofilaments slide between the stationary thick myofilaments and…

Q: When a muscle fiber is stimulated with repeated stimuli, the contraction force is summed due to: a)…

A: INTRODUCTION Summation is that the . occurrence of additional twitch contractions before the…

Q: Compare the rate of Ca2+ release from the sarcoplasmic reticulum to the rate of Ca2+ return back to…

A: The sarcoplasmic reticulum stores calcium ions, which it releases when a muscle cell is stimulated.…

Q: What factors are responsible for the amount of tension a skeletal muscle develops?

A: The muscular system, composed of tissues, capable of changing their shape, is responsible for…

Q: hich of the following labeled zones in the electron -E (OC) OB) OA) 00) D E) -C -8

A: Muscles are the structures that are attached to the body's skeleton and are composed of cells that…

Q: What is the effect of calcium being released into the sarcoplasm? Be specific. What does it bind to,…

A: When calcium is released into the sarcoplasm it binds to troponin

Q: What happens when the muscular action potential spreads through transverse (T) tubules of the…

A: T-tubules are augmentations of the cell membrane that enter into the center of skeletal and…