List the four steps of the contraction cycle in order of occurrence. What is needed for these steps to continuously repeat?

What will be an ideal response


ATP hydrolysis, attachment of myosin to actin forming crossbridges, the power stroke, then detachment of myosin from actin. The cycle will continue as long as ATP and calcium ions are available.

Anatomy & Physiology

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The ____________________ serves as a "relay station" for preliminary processing of sensory input

Fill in the blank(s) with correct word

Anatomy & Physiology

Which statement is true regarding pseudo-stratified ciliated columnar epithelium?

A) It is well-suited for extreme stretching. B) It contains only one layer of cells. C) Its cells are predominantly cube shaped. D) It consists of many layers of cells.

Anatomy & Physiology

Aged and damaged erythrocytes are broken down by macrophages in the

A) spleen. B) liver. C) bone marrow. D) digestive tract. E) spleen, liver, and bone marrow.

Anatomy & Physiology

As the thoracic cavity enlarges, the lungs enlarge

Indicate whether the statement is true or false

Anatomy & Physiology