Which of the following is a requirement for pregnancy to occur?
A. There must be a sperm and an egg.
B. The fertilized egg must implant in the uterus.
C. The sperm must meet and fertilize the egg.
D. All of these must happen for pregnancy to occur.
Answer: D
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Water loss due to evaporation of fluid that has penetrated through the skin is called ________ perspiration
A) sensible B) insensible C) latent D) active E) inactive
Which of the following is a function of erythrocytes?
A. To defend the body against pathogens B. To initiate blood clotting C. To regulate erythropoiesis D. To transport nutrients E. To transport carbon dioxide
The body has several ways to keep blood moving forward through the veins. Which of the following does NOT explain how this happens?
A. The pressure in the veins is lower than the pressure in the arteries (i.e. blood flows down its pressure gradient). B. Valves in the veins prevent backflow. C. The aid of respiratory pump (changes in pressure in thoracic cavity during inhalation and exhalation). D. The pumping of the venous endothelial contraction nodules (which act like a series of miniature hearts). E. The aid of contractions of skeletal muscles.
What condition results if the blood's pH is less than 7.35?
A. Alkaline B. Acidic C. Alkalosis D. Acidosis