What stem cell gives rise to all formed elements?

A) lymphoid stem cell
B) megakaryocyte
C) hemocytoblast
D) myeloid stem cell
E) reticulocyte


C

Anatomy & Physiology

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The basic contractile unit of a skeletal muscle is the:

a. sarcomere b. actin c. myosin d. Z-lines

Anatomy & Physiology

Muscles with fibers that run perpendicular to the long axis of the body are called

A) lateralis. B) transversus. C) rectus. D) oblique. E) medialis.

Anatomy & Physiology

Which of the following wraps and surrounds an individual skeletal muscle fiber?

A) endomysium B) epimysium C) sarcoplasmic reticulum D) perimysium

Anatomy & Physiology

A group of cells was treated with a proteolytic (protein-digesting) enzyme. Which of the following processes would be least affected by this treatment?

A. Diffusion of Na+ through membrane channels B. Diffusion of lipid-soluble molecules through the plasma membrane C. Use of carrier molecules in facilitated diffusion D. Secondary active transport E. Sodium-potassium exchange pump

Anatomy & Physiology