What is the role of the neuromuscular junction?

It is the site where an axon of a motor neuron and skeletal muscle fiber interact.

It stores calcium in the muscle cell.

It composes the thick filaments.

It prevents cross-bridge formation.

What is the role of acetylcholine (ACh) in muscle contraction?

It binds to ACh receptors on the motor end plate of muscle fibers.

It decomposes ACh in the synapse.

It moves calcium ions back into the sarcoplasmic reticulum.

It covers binding sites on actin.

What happens when neural stimulation of muscle fiber stops?

Acetylcholinesterase decomposes ACh remaining in the synapse.

Calcium ions are released from the sarcoplasmic reticulum.

ACh is released from synaptic vesicles.

Myosin and actin binding is facilitated.

What prevents myosin and actin from binding when muscle fiber relaxes?

Troponin-tropomyosin complex covering binding sites on actin

Release of ACh from synaptic vesicles

Increase in membrane permeability to sodium ions

Decomposition of ACh by acetylcholinesterase

What is the primary use of oxygen during strenuous exercise?

Producing ATP for muscle contraction

Converting lactic acid to glucose

What is a common cause of muscle fatigue?

Ion imbalances across the sarcolemma

Decreased lactic acid accumulation

What is a characteristic of a muscle cramp?

Sustained, involuntary muscle contraction

Decreased electrolyte concentration

What is the latent period in a muscle twitch?

The delay between stimulation and start of contraction

The time when the fiber pulls at attachments

The period when pulling force decreases

The time when the muscle fiber is at rest

What is muscle tone (tonus)?

Continuous state of partial contraction in resting muscles

A state of complete relaxation in muscles

A type of isometric contraction

What happens during isometric contraction?

Muscle contracts but does not change length

Muscle contracts and changes length

Muscle lengthens without tension

What is hypertrophy in skeletal muscles?

Enlargement of skeletal muscle that is exercised

Decrease in size and strength of muscle

Which type of smooth muscle functions as separate units and is stimulated by neurons and hormones?

Visceral (Single-unit) Smooth Muscle

What characteristic is shared by both skeletal and smooth muscle contraction?

Interaction between actin and myosin

Which neurotransmitters affect smooth muscle?

Acetylcholine (Ach) and norepinephrine (NE)

What is the role of intercalated discs in muscle fibers?

They join muscle fibers together.

They allow fibers to contract independently.

They prevent muscle contraction.

They increase the number of nuclei in fibers.

What is the function of an antagonist muscle?

It causes movement in the opposite direction of the prime mover.

It is the primary muscle responsible for movement.

It stabilizes the origin of the muscle.

Muscle Tissue Quiz

Authored by Tracie Harris

Biology

12th Grade

NGSS covered

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44 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of muscle tissue is attached to bones and is voluntarily controlled?

Cardiac muscle

Smooth muscle

Skeletal muscle

Involuntary muscle

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of cardiac muscle?

Digestion

Pumping action of the heart

Voluntary movement

Connecting muscles to bones

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where is smooth muscle typically found?

Attached to bones

In the heart

In the walls of internal organs

Surrounding muscle fibers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of fascia in muscle tissue?

Surrounds whole muscle

Connects muscle to bone

Thin covering of connective tissue around a muscle

Cytoplasm of muscle fiber

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which connective tissue surrounds the whole muscle and lies beneath the fascia?

Perimysium

Endomysium

Epimysium

Sarcolemma

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the functional unit of a muscle that produces striation in repeating patterns?

Myofibrils

Sarcomeres

Actin

Myosin

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which structure in the muscle cell stores calcium?

Transverse tubule

Sarcoplasmic reticulum

Myofibril

Neuromuscular junction

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Muscle Tissue Quiz

Which type of muscle tissue is attached to bones and is voluntarily controlled?

What is the primary function of cardiac muscle?

Where is smooth muscle typically found?

What is the function of fascia in muscle tissue?

Which connective tissue surrounds the whole muscle and lies beneath the fascia?

What is the functional unit of a muscle that produces striation in repeating patterns?

Which structure in the muscle cell stores calcium?

What protein composes thick filaments in muscle fibers?

Which proteins are associated with thin filaments to prevent cross-bridge formation when the muscle is not contracting?

What is the role of the neuromuscular junction?

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