THIRD ANZ EDITION REVISED
CERTIFICATION EVALUATION TEST FULL
QUESTIONS AND CORRECT ANSWERS
GRADED A+
⩥ Movement.
Answer: Muscle cells can generate forces that produce motion. Muscles
that are attached to bones produce limb movements, whereas those
muscles that enclose hollow tubes or cavities move or empty contents
when they contract (e.g., the colon).
⩥ Conductivity.
Answer: Conduction as a response to a stimulus is manifested by a wave
of excitation, an electrical potential that passes along the surface of the
cell to reach its other parts. Conductivity is the chief function of nerve
cells.
⩥ Metabolic Absorption.
Answer: All cells can take in and use nutrients and other substances
from their surroundings.
⩥ Secretion.
, Answer: Certain cells, such as mucous gland cells, can synthesize new
substances from substances they absorb and then secrete the new
substances to serve as needed elsewhere.
⩥ Excretion.
Answer: All cells can rid themselves of waste products resulting from
the metabolic breakdown of nutrients. Membrane-bound sacs
(lysosomes) within cells contain enzymes that break down, or digest,
large molecules, turning them into waste products that are released from
the cell.
⩥ Respiration.
Answer: Cells absorb oxygen, which is used to transform nutrients into
energy in the form of adenosine triphosphate (ATP). Cellular respiration,
or oxidation, occurs in organelles called mitochondria.
⩥ Reproduction.
Answer: Tissue growth occurs as cells enlarge and reproduce
themselves. Even without growth, tissue maintenance requires that new
cells be produced to replace cells that are lost normally through cellular
death. Not all cells are capable of continuous division (see Chapter 4).
⩥ Communication.