Erythropoietin, a hormone that stimulates stem cells in bone marrow to increase erythrocyte
production, is produced in the
a. bone marrow.
b. heart.
c. kidneys.
d. liver.
e. lymph nodes.
C
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Given what is known about the minimal essential functions of cellular life, if you could create an artificial cell, what cellular structures must you include?
A. cell wall B. ribosomes C. mitochondria D. nucleus
Nitrogen fixation is used to form ATP, which is then used for energy reserves.
Answer the following statement true (T) or false (F)
Which of the following would NOT be considered a cell-surface receptor?
A. a receptor that binds a nonpolar steroid hormone and activates transcription B. a receptor that allows ions to enter the cell when a ligand binds C. a receptor that causes GDP to be exchanged for GTP in a G protein D. a receptor that must form a dimer after binding the ligand to transmit a signal
Dmitry Mendeleev arranged all the elements by ________ in the periodic table so elements in the same ________ behave in similar ways
a. number of neutrons / column b. mass number / row c. number of electrons / row d. atomic number / column