Physiology of Muscle Contraction

What are the three types of muscular tissue

• Tendons, ligaments, cartilage

• Red muscle, white muscle, yellow muscle

• Voluntary muscle, involuntary muscle, reflex muscle

• Skeletal muscle, cardiac muscle, smooth muscle

Your heart is an example of which type of muscle?

• big one

• voluntary

• involuntary

• bicep

What are the substructures of skeletal muscle?

• Muscle fibers, myofibrils, sarcomeres, connective tissue

• Tendons, ligaments, cartilage, synovial fluid

• Neurons, glial cells, blood vessels, lymph nodes

• Epithelial cells, adipose tissue, fibroblasts, chondrocytes

What part of the muscle fiber stores Ca ions and releases them when stimulated?

• T tubule

• Sarcolemma

• Nucleus

• Sarcoplasmic reticulum

Which of these statements is correct regarding muscle contraction?

• All motor units act together

• Muscle contraction continues for long periods after nervous stimulation ceases

• The crossbridges bind to the actin and shorten the sarcomeres

• Troponin is not needed to strengthen the contracting muscle cell.

What is the function of this entire diagram?

• controlling a nerve

• controlling a skeletal muscle contraction

• endocytosis

• inserting a musle on a bone

Click all that apply. Which of these make up a motor unit?

• Motor neuron

• Muscle fiber

• Muscle

• Nerve

What is the contractile unit of the muscle?

• Z disk

• Sarcomere

• Muscle fiber

• Muscle cell

What protein makes up the thick filaments?

• Troponin

• Tropomyosin

• Myosin

• Actin

What is the name of the location where the neuron and muscle fiber meet?

• Sarcoplasm

• Sacolemma

• Neuromuscular junction

• Axon terminal