?What are the basic units of organization of all organisms?

a. organelles
b. organs
c. molecules
d. cells


Answer: d. cells

Anatomy & Physiology

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Steroids are a type of ________.

A. lipid B. sugar C. protein D. nucleic acid

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A motor unit is

A) a motor neuron and the muscle fibers connected to it. B) the functional unit of a muscle fiber. C) many myofibrils in a sarcolemma. D) many motor end plates at a neuromuscular junction.

Anatomy & Physiology

A constant blood supply to this organ is a priority of the circulatory system:

a. heart. b. kidney. c. brain. d. muscle. e. liver.

Anatomy & Physiology

A(n) ________ is the region of the molecule that is recognized by antibodies

A) major histocompatibility complex (MHC) B) antigen C) epitope D) antibody monomer E) hapten

Anatomy & Physiology