You have observed an extrasystole in your recording of frog heart contractile activity. Where did it occur?

A) during ventricular diastole B) during ventricular systole C) during atrial contraction


Answer: A

Anatomy & Physiology

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Antioxidants neutralize ________________________________________ radicals

Fill in the blank(s) with correct word

Anatomy & Physiology

The action potential of a muscle fiber occurs

A. along the sarcolemma and down the T-tubules. B. at the end plate. C. in the mitochondria. D. within the sarcoplasmic reticulum.

Anatomy & Physiology

What is the name for a biological catalyst?

A) enzyme B) active site C) polysaccharide D) substrate

Anatomy & Physiology

What muscular changes are involved in the breathing process?

What will be an ideal response?

Anatomy & Physiology