Answer the following statements true (T) or false (F)
1. About 20% of the blood pumped by the heart enters the kidneys.
2. The medulla is the inner part of the kidney.
3. The cortex is the inner part of the kidney.
4. The pyramids are expansions of the upper end of the ureters.
5. The pyramids are the triangular divisions of the medulla of the kidney.
1. TRUE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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The portion of the transmembrane receptor that binds to hydrophilic messengers is termed the
A) Receptor-binding domain. B) Transmembrane domain. C) Ligand-binding domain. D) Intracellular domain.
When carrier proteins are saturated, they are said to be working at what?
A) increased affinity B) increased capacity C) active reabsorptive state D) transport maximum E) diminished capacity
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.
Exhausted from studying all night, you briefly close your eyes and your mind starts to wander. Which brain waves would be most predominant in an EEG?
A. Theta B. Delta C. Beta D. Alpha