A&P Lecture : Chapter 10 Quiz

Check all that are a function of skeletal muscle tissue.

- body movement - maintenance of posture - heat production - regulating elimination of materials

During contraction, the actin myofilaments slide toward the

H zone

Concentric contraction and eccentric contraction are both types of what major type of muscle tension?

Isotonic contraction

In a 1500-meter run, an event that may take about 5 to 6 minutes, ATP is supplied by which energy sources?

Phosphagens, anaerobic, and aerobic sources

The primary neurotransmitter at the neuromuscular junction is

acetylcholine

The sequence for smooth muscle contraction is

increased cytosolic calcium, which binds to calmodulin in cytosol, complex binds with myosin light-chain kinase, which uses ATP to phosphorylate myosin cross bridges, which bind to actin filaments, resulting in contraction.

The specialized region of the sarcolemma that has folds and indentations to increase the membrane surface area covered by the synaptic knob is the

motor end plate

An action potential causes calcium ions to diffuse from the ________ into the ________.

sarcoplasmic reticulum; sarcoplasm

At the ends of muscles, the connective tissues merge to form a __________, which attaches the muscle to other structures.

tendon

Which of the following refers to a sustained muscle contraction?

tetanus

The diameter of a muscle fiber will predict

the amount of power it can generate.