#Question id: 11547
#Unit 7. System Physiology – Animal
A cluster of tumor cells that produces and secretes growth factors to induce surrounding cells to grow and divide is showing which type of cell-to-cell signaling?
#Question id: 11548
#Unit 7. System Physiology – Animal
If a portion of the pancreas is surgically removed from a rat and the rat subsequently loses its appetite, one explanation is that the removed portion contains cells that secrete a chemical signal that somehow stimulates appetite. Given this scenario, what type of chemical signaling is occurring?
#Question id: 11549
#Unit 7. System Physiology – Animal
If a biochemist discovers a new molecule, which of the
following pieces of data would allow her to draw the conclusion that the
molecule is a steroid hormone?
I) The molecule is lipid soluble.
II) The molecule is derived from a series of steps
beginning with cholesterol.
III) The molecule acts at a target tissue some
distance from where it is produced.
IV) The molecule uses a transport protein when in an aqueous solution such as blood.
#Question id: 11550
#Unit 7. System Physiology – Animal
Which of the
following are similar in structure to cholesterol?
I) estradiol
II) insulin
III)
glucocorticoids
IV) testosterone
V) antidiuretic hormone
#Question id: 11551
#Unit 7. System Physiology – Animal
Polypeptides can have which of the following types of
effects?
I) autocrine
II) paracrine
III) endocrine
#Question id: 11552
#Unit 7. System Physiology – Animal
Which of the following are properties of steroid
hormones?
I) Steroid hormones are lipid soluble and easily cross
the phospholipid bilayer.
II) Steroid hormones usually exert their effects on target cells through membrane receptor proteins.
III) Steroid hormones act on cells close to where they
were produced.
IV) Steroid hormones regulate gene transcription by binding to intracellular receptor proteins.