The duration of the cell cycle is decreased in response to increased amounts of ________.
A. DNA helicase
B. cyclin
C. proteasome
D. telomerase
Answer: B
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Match the following:
A) Type I cells B) Type II cells C) Respiratory bronchioles D) Alveolar duct E) Segmental bronchi 1) No exchange of gases occurs here. 2) Secrete a fluid containing surfactant. 3) Where the respiratory zone of the lungs begins. 4) Composed of simple squamous epithelium. 5) Terminates in alveoli. 6) Composed of cuboidal cells. 7) The respiratory membrane is composed of fused basement membrane of the capillary walls and ________.
Steroids are derived from cholesterol.
Answer the following statement true (T) or false (F)
Most of the lymph returns to the venous circulation by way of the
A) right lymphatic duct. B) thoracic duct. C) cisterna chyli. D) hepatic portal vein. E) dural sinus.
What hormone(s) inhibit(s) the secretion of FSH and LH during the female sexual cycle?
A) Androgens B) Estradiol and progesterone C) GnRH D) Estradiol E) Progesterone