Which best describes the extracellular matrix?
A. It covers the body's surface, it contains connective and muscle tissue, and it helps generate movement.
B. It surrounds cells; it contains proteins, polysaccharides, and minerals; it provides a scaffold for cell attachment; and it transmits chemical messengers to cells.
C. It is a tissue having more than the four general cell types, it transports proteins and polysaccharides between body compartments, and it is the route by which chemical signals like hormones reach all parts of the body.
D. It is found just inside the cell membrane in all tissues, it sends branching collagen fibers between cells to connect them, and it transmits chemical information from the interior of one cell to the interior of adjacent cells.
Answer: B
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Which cardiac vein travels with the left marginal artery?
A) great cardiac vein B) middle cardiac vein C) small cardiac vein D) posterior cardiac vein
Dominant alleles are so called because under most circumstances they ________
A) code for genes that are never considered lethal B) suppress the expression of other alleles C) code for desired traits only D) code for most phenotypic and genotypic expressions of a trait
The gap junctions in cardiac muscle are part of specialized cell junctions that are localized to the ________.
Fill in the blank(s) with the appropriate word(s).