Which molecules integrate changes outside and inside the cells through communicating changes in the extracellular
matrix to the cytoskeleton?
a. gap junctions and proteoglycans
b. collagen and integrin
c. fibronectin and collagen
d. fibronectin and integrin
e. gap junctions and fibronectin
ANSWER: d
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The fertilized egg is also called the ____
Fill in the blank with the appropriate word.
Fluid inside vessel elements is being pulled
upward primarily by
a. turgor pressure. b. negative pressures from the atmosphere (tensions). c. osmotic gradients. d. pressure flow forces. e. active transport
Typically, blastocyst implantation in the uterus takes place at day ___
A. 1-2 D. 5 B. 3 E. 6-7 C. 4
Hyperpolarization of a neuron causes the membrane potential to become _______ negative and is largely responsible for the _______ refractory period.
A. less/absolute B. less/relative C. more/absolute D. more/relative