What condition of smooth muscle allows it to maintain contraction for long periods of time?
A. Myogenic activity
B. Gap junctions
C. Latch state
D. Peristalsis
Answer: C
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Macrophages are cells that engulf and consume germs or debris. What organelle must be especially plentiful in these cells?
A) centrioles B) lysosomes C) mitochondria D) ribosomes E) nuclei
Modification and packaging of proteins with other molecules is done by the
A) ribosome. B) nucleolus. C) smooth endoplasmic reticulum. D) Golgi apparatus. E) nucleus.
Simple compounds are built up and used to manufacture cellular materials in the process of ________.
A. catabolism B. positive feedback C. anabolism D. negative feedback
Which of the following would slow down gas exchange between the blood and alveolar air?
A) An increase in respiratory rate B) An increase in membrane thickness C) A decrease in nitrogen solubility D) A decrease in membrane thickness E) An increase in alveolar surface area