Which of the Following Characterizes Internal and External Forces

question 14

Multiple Choice

Which of the following characterizes internal and external forces?

• A)Gravity is an internal force;muscle contraction is an external force.
• B)Muscle contraction is an internal force;gravity is an external force.
• C)Gravity and muscle contraction are both internal forces.
• D)Gravity and muscle contraction are both external forces.

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Definitions:

Compact Bone

The dense, hard outer layer of bone that provides strength and support and contains passageways for blood vessels and nerves.

Red Bone Marrow

A type of bone marrow that produces red blood cells, white blood cells, and platelets.

Blood Forming Cells

Cells found primarily in the bone marrow that give rise to all the blood cells including red blood cells, white blood cells, and platelets.

Upper Limbs

Refers to the part of the body that includes the arm, forearm, wrist, and hand.