Which of the following is true of intercellular junctions, such as tight junctions, desmosomes, and gap junctions?
a. They are specialized forms of communication among nerve cells.
b. They are of primary importance in the contraction of skeletal muscle fibers.
c. They are equally distributed among all tissue types.
d. They help to integrate cells into a functioning unit.
e. They aid in distributing DNA among cells.
Ans: d. They help to integrate cells into a functioning unit.
You might also like to view...
An antimicrobial drug that inhibits the growth of bacteria without affecting the growth or function of cells in the human host is described as being ___________ ________.
Fill in the blank(s) with the appropriate word(s).
A condition in which one gene pair masks the expression of a nonallelic gene pair is called ________
A) dominance B) additive alleles C) codominance D) epistasis E) recessiveness
Which of the following is part of the brain?
A) thymus B) hypothalamus C) adrenal cortex D) thyroid
Which of the following statements about staphylococcal food poisoning is FALSE?
A) It is caused by ingesting an enterotoxin. B) It can be prevented by adequate refrigeration of food. C) It can be prevented by heating foods to 50°C for 15 minutes. D) It is treated by replacing water and electrolytes. E) It is characterized by rapid onset and short duration of symptoms.