Muscle Contraction Quiz

What is the role of the sarcoplasmic reticulum in muscle contraction?

• It stores calcium ions.

• It transmits nerve impulses.

• It breaks down glucose.

• It synthesizes proteins.

Which structure is responsible for transmitting electrical impulses into the muscle fiber?

• Sarcoplasmic reticulum

• Transverse tubules

• Motor end plate

• Myofibrils

What is the function of neurotransmitters in the neuromuscular junction?

• They store energy.

• They transmit signals from neurons to muscles.

• They provide structural support.

• They transport oxygen.

What are myofibrils composed of?

• Lipids and carbohydrates

• Actin and myosin

• DNA and RNA

• Calcium and potassium

What is the basic contractile unit of a muscle fiber?

• Synapse

• Sarcomere

• Motor neuron

• Neurotransmitter

Neurons that control effectors (such as muscles) are called

• Synapses

• Motor Neurons

• Neurotransmitters

• motor end plate

The functional connection between a neuron and another cell is called a

• Motor neuron

• neurotransmitter

• Synaptic cleft

• synapse

Neurons communicate with other cells that they control by releasing chemicals, called

• Motor neurons

• neuromusclular Juncions

• neurotransmitters

• myofibrils

A thick myofilament protein that is the mechanism of muscle contraction

• Actin

• Myosin

• Globulin

• Neurostransmitters

A thin myofilament protein that is the mechanism of muscle contraction

• Actin

• Myosin

• Globulin

• Neurostransmitters