Exam 5: The Muscular System

The _______ muscle elevates the upper corners of the mouth.

The _______ muscle flexes the trunk and compresses the abdominal contents.

A muscle that extends the elbow is the _______.

Rapid breathing pays back the _______ debt by breaking down lactic acid.

The immediate source of energy for muscle contractions comes from _______.

The depletion of ATP results in weaker contractions and _______.

Thin filaments, called _______ filaments, consist of the protein actin.

Fill in the correct labels for the following figure using the word bank below. -F ___________

Fill in the correct labels for the following figure using the word bank below. -E ___________

_______ contraction occurs when the muscle length does not appreciably change but muscle tension increases.

Fill in the correct labels for the following figure using the word bank below. -G ___________

Fill in the correct labels for the following figure using the word bank below. -H ___________

Fill in the correct labels for the following figure using the word bank below. -B ___________

_______ contraction occurs when muscles shorten and thicken.

Fill in the correct labels for the following figure using the word bank below. -M ___________

Fill in the correct labels for the following figure using the word bank below. -A ___________