Cells Require Which of the Following for Muscle Contraction

There are more cross-bridges in smooth muscle cells than skeletal muscle cells. 1 The sequence of events leading to contraction is initiated somewhere in the central nervous system either as voluntary activity from the brain or as reflex activity from the spinal cord.

Comparing Skeletal And Smooth Muscle Contractions Skeletal And Muscular System Skeletal Muscle Skeletal

Cardiac muscle cells require a burst of calcium from the sarcoplasmic reticulum.

. The signal an impulse called an action potential travels through a type of nerve cell called a motor neuron. A calcium levels in the sarcoplasm fall b myosin releases the thin filaments c the T-tubules actively transport sodium ions out of the cell d ACh levels in the synaptic cleft increase e muscle tension declines. A They are spindle shaped.

A signal is sent from the brain or the spinal cord to the muscle via neurons. ATP is critical to prepare myosin for binding and to recharge the myosin. Myosin binds to actin at a binding site on the globular actin protein.

Muscle cells move in this manner. Muscles contract in response to depolarization activation of G-protein-coupled receptors and other stimuli. Actin is a globular contractile protein that interacts with myosin for muscle contraction.

2 A motor neuron in the ventral horn of the spinal cord is activated and an action potential passes outward in a ventral root of the spinal cord. Myosin has another binding site for ATP at which enzymatic activity hydrolyzes ATP to ADP releasing an inorganic phosphate. B Under normal resting conditions cardiac muscle tissue contracts and relaxes about 75 times per minute.

A contracted muscle cell recoils to its resting length when the applied tension is removed. A the muscle cells of the motor unit will occasionally contract B only select muscle cells within the motor unit are stimulated to contract C every muscle cell of the motor unit is stimulated to contract D the muscle cells from a neighboring motor unit will contract E all of the muscle cells within the motor unit are stimulated to relax. Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the _____ period during which the events of excitation-contraction coupling occur.

Skeletal muscle cells require a burst of calcium from the sarcoplasmic reticulum. Muscle Contraction Steps in Detail. Which of the following occur during the relaxation phase of muscle contraction.

We recently published a report Deyhle et al 2015 also showing that CD8 T-cells were increased in muscle following contraction-induced injury. Which one of the following statements concerning cardiac muscle cells is true. The following are the various sorts of movements that human body cells exhibit.

There are three types of mammalian musclesskeletal cardiac and smooth. Smooth muscle cells require a burst of calcium from the sarcoplasmic reticulum. In the smooth muscles calcium causes an initiation of the smooth muscles cells to contract through the calcium binding to the calmodulin and causing.

A Cardiac muscle contracts when stimulated by its own autorhythmic muscle cells. The influx of caalcium ions causes acetylcholine AcH to be released in the synaptic cleft. The calcium helps in muscle contraction through binding onto the troponin which is found in the cardiac muscles.

C Cardiac muscle fibers depend mostly on anaerobic cellular respiration to generate ATP. ATP first binds to myosin moving it to a high-energy state. B They require an external stimulus to undergo contraction.

A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles. E They possess numerous caveolae. D They are joined together end to end by intercalated disks.

The cardiac muscles need the calcium released from the sarcoplasmic reticulum for cardiac muscle contraction. The actomyosin fibers responsible for contraction require an increase in the cytosolic levels of calcium which signaling pathways induce by promoting influx from extracellular sources or release from intracellular stores. Muscle contraction begins when the nervous system generates a signal.

Which of the following is true concerning the role of Calcium in the contraction of muscle- cells. Smooth muscle tissue occurs in the walls of hollow organs such as the intestines stomach and urinary bladder and around passages such as the respiratory tract and blood vessels. The neuromuscular junction is the name of the place where the motor neuron reaches a muscle.

Write the word or phrase that best completes each statement or answers the questio 48Briefly explain the sources of energy for a one-minute sustained muscle contraction. Smooth muscle can produce more force and achieve a greater change in size than skeletal muscle. However we used a less extreme.

This is a form of movement seen in blood leukocytes. Instead Ca2 controlled by sarcolemmal vesicles known as caveolae is released into the cytosol where it binds with calmodulin. Smooth muscle cells are involuntary slower and able to endure longer than skeletal muscle.

The function of these T-cells and whether they were detrimental beneficial or passive observers to the muscle damagerepair process following contraction-induced damage is not known. The Cross-Bridge Muscle Contraction Cycle. AcH binds to the AcH receptors present in.

An action potential is generated in the neuron releasing Ca in the neuromuscular junction. 3 The axon branches to supply a number of. No type of muscle cell requires an extracellular inward-Calcium current for normal contractile-function 25.

The first 4-6 seconds of energy come from stored ATP in the muscle cell. Select all that apply. This action requires energy which is provided by ATP.

However ATP is not stored to a great extent in cells. The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate ATP the bodys biochemical way to store and transport energy. 6-15 seconds of energy come from the transfer of creatine phosphate and ADP.

When tissue is damaged leucocytes from the circulatory system migrate to the site of the injury to trigger an immune response. C They are multinuclear cells. The large muscle protein that essentially anchors the thin filaments to the cell membrane and extracellular matrix and is also the muscle protein that plays a role in the disease known as muscular dystrophy is.

Skeletal muscles are attached to bones and move them relative to each other. Muscles contract in a repeated pattern of binding and releasing between the two thin and thick strands of the sarcomere. Smooth muscle cells are under more conscious control than skeletal muscles.

Cardiac muscle comprises the. Smooth muscle has no striations is not under. Muscle cells are designed to generate force and movement.

The motion of muscle shortening occurs as myosin heads bind to actin and pull the actin inwards. ATP and Muscle Contraction. A _____ contraction of the arm muscle allows you to lift a book from the table while a ____ contraction of the arm muscles allows you to lower the book back down to the table.

The calcium-calmodulin complex activates myosin light-chain kinase which participates in the contraction process see Chapter 8 VI A 2. Skeletal muscle also has multiple nuclei present in a single cell. Contraction is not dependent on troponin which is absent from the thin filament of smooth muscle.

So once muscle contraction starts the making of more ATP must start quickly.

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