A cell whose job is to detoxify harmful or poisonous substances such as alcohol would have many:
A) nuclei
B) peroxisomes
C) lysosomes
D) rough endoplasmic reticulum
E) flagella
Ans: B) peroxisomes
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Because of the active transport of Na+ and K+, the intracellular concentration of Na+ is lower than the extracellular concentration, whereas the reverse is true for K+.
Answer the following statement true (T) or false (F)
Touch and pressure receptors can be broadly grouped into three categories: tactile receptors, proprioceptors, and __________
Fill in the blank with the correct word.
Many polypeptide and glycoprotein hormones are secreted in discrete bursts called pulsatile secretions.
Answer the following statement true (T) or false (F)
The trachea and mainstem bronchi:
A) constrict violently when their beta-2 receptors are stimulated excessively. B) are approximately 10 to 12 cm in length and are joined together at the hilum. C) do not contain mucous-producing cells in patients without a respiratory disease. D) are lined with beta-2 receptors that result in bronchodilation when stimulated.