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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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.
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.