The part of a cell that is most like our organs is the ________.

A. organelle
B. organic macromolecule
C. atom
D. organism


Answer: A

Anatomy & Physiology

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During the plateau phase of the action potentials of myocardial contractile cells, which ion(s) is/are crossing the membrane?

A) K+ only B) Na+only C) both Na+ and K+ D) Ca2+ only E) both Ca2+ and K+

Anatomy & Physiology

Which of the following may explain why self-tolerance may fail?

A. A noncirculating antigen becomes exposed to the immune system. B. Antibodies produced against foreign antigens cross-react with self-antigens. C. Antibodies directed against other antibodies are produced. D. All of the choices are correct.

Anatomy & Physiology

A gene is

A. a DNA sequence that contains the information for producing one type of protein. B. the collection of all of the protein-encoding DNA sequences on a particular chromosome. C. an amino acid sequence that contains the information for producing a particular DNA sequence. D. a structure that contains chromosomes.

Anatomy & Physiology

The brain has about one hundred million neurons.

Answer the following statement true (T) or false (F)

Anatomy & Physiology