Muscle Tissue Characteristics

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Which type of muscle tissue can undergo mitosis and regeneration?

Cardiac muscle

All types of muscle tissue

Smooth muscle (correct)

Skeletal muscle

What is the main characteristic of skeletal muscle contraction?

Fast, all-or-none contraction

Can only contract fully (correct)

Can only contract partially

Slow, partial contraction

What type of muscle tissue is controlled by the autonomic nervous system?

Smooth muscle

Skeletal muscle

Both cardiac and smooth muscle (correct)

Cardiac muscle

Which type of muscle tissue has intercalated discs for cell-to-cell junctions?

Cardiac muscle Signup and view all the answers

What is the main function of satellite cells in skeletal muscle?

To aid recovery Signup and view all the answers

Which type of muscle tissue has a single central nucleus?

Both cardiac and smooth muscle Signup and view all the answers

What type of muscle tissue is found in the walls of hollow organs?

Smooth muscle Signup and view all the answers

What is the main characteristic of cardiac muscle contraction?

Fast, all-or-none contraction Signup and view all the answers

What type of muscle tissue has striation due to the dense arrangement of actin and myosin?

Skeletal muscle Signup and view all the answers

What is the role of calcium in muscle contraction?

It binds to Tropin, deforming tropomyosin Signup and view all the answers

What happens when an action potential opens in a muscle cell?

Calcium floods into the cell Signup and view all the answers

Which statement is true regarding rigor mortis?

It occurs due to a lack of ATP Signup and view all the answers

Which of the following neuron types does not have dendrites at its perikaryon?

Unipolar neuron Signup and view all the answers

Which structural component of a neuron is primarily responsible for receiving nerve impulses?

Dendrites Signup and view all the answers

Which of the following correctly describes the action of myosin during muscle contraction?

Myosin heads bind to actin when tropomyosin is deformed Signup and view all the answers

Where are the presynaptic terminals located in a multipolar neuron?

At the distal end of the axon Signup and view all the answers

What occurs when calcium unbinds from Tropin during muscle relaxation?

Actin and myosin are blocked from interacting Signup and view all the answers

What is the primary function of the sarcoplasmic reticulum in muscle cells?

Storing and releasing calcium Signup and view all the answers

Where are the perikaryon and dendrites located in a bipolar neuron?

One end has dendrites, while perikaryon is in the middle Signup and view all the answers

What is the primary function of intercalated discs in cardiac muscle tissue?

To allow for coordinated contraction Signup and view all the answers

What is unique about the nucleus of skeletal muscle cells?

It is multi-nucleated Signup and view all the answers

What is the main difference between cardiac and skeletal muscle contraction?

Cardiac muscle contraction is all or none Signup and view all the answers

What type of muscle tissue has gap junctions for cell-to-cell communication?

Smooth muscle Signup and view all the answers

What is the primary function of autonomic innervation in smooth muscle tissue?

To allow for automatic contraction and relaxation Signup and view all the answers

What is the primary function of satellite cells in skeletal muscle?

To aid in muscle recovery Signup and view all the answers

Which type of muscle tissue is voluntary?

Skeletal muscle Signup and view all the answers

What is the primary difference between skeletal and cardiac muscle structure?

Skeletal muscle is multinucleated Signup and view all the answers

What is the primary characteristic of smooth muscle contraction?

It is slow and partial Signup and view all the answers

Which statement accurately describes the role of the sarcoplasmic reticulum during muscle contraction?

It stores calcium ions needed for muscle contractions. Signup and view all the answers

What happens to the myosin heads during contraction?

They bind to actin filaments and pull them inward. Signup and view all the answers

What is the primary function of Troponin in skeletal muscle contraction?

It deforms tropomyosin allowing myosin to bind to actin. Signup and view all the answers

Which mechanism causes muscle contraction to cease?

Closure of action potentials stopping calcium influx. Signup and view all the answers

What results from calcium binding to Troponin during skeletal muscle contraction?

Tropomyosin is deformed, allowing myosin to bind. Signup and view all the answers

What distinguishes a pseudo-unipolar neuron from other neuron types?

It has a perikaryon in the middle of its axon. Signup and view all the answers

Which event characterizes rigor mortis at a molecular level?

Lack of ATP leading to persistent myosin-actin binding. Signup and view all the answers

What happens when calcium unbinds from Troponin after a muscle contraction?

Actin binding sites are once again covered by tropomyosin. Signup and view all the answers

What differentiates a bipolar neuron from a multipolar neuron?

Presynaptic terminals are located at one end with the perikaryon in the center in bipolar neurons. Signup and view all the answers

What triggers the release of calcium ions from the sarcoplasmic reticulum during muscle contraction?

Initiation of an action potential in the muscle fiber. Signup and view all the answers