Which of the following is an example of a membranous organelle?
A) microvilli
B) cilia
C) centrioles
D) ribosomes
E) mitochondria
Answer: E
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Circumduction is an example of a gliding motion.
Answer the following statement true (T) or false (F)
Stretching of the cervix causes an increase in the blood levels of
A) estrogen. B) progesterone. C) oxytocin. D) relaxin. E) chorionic gonadotropin.
The subjective feeling of hunger is stimulated when:
A. plasma insulin concentration increases. B. plasma ghrelin concentration decreases. C. plasma leptin concentration decreases. D. plasma glucose concentration increases. E. body temperature increases.
How does lung perfusion work in ventilation-perfusion coupling?
A. Alveolar capillaries constrict where the partial pressure of oxygen is low, so blood is diverted to where the partial pressure of oxygen is high. B. If partial pressure of carbon dioxide increases, the bronchioles dilate. C. Air flow is directed to lobules where partial pressure of carbon dioxide is high. D. If partial pressure of carbon dioxide decreases, the bronchioles constrict.