An enzyme secreted in an inactive form is called an ______
Fill in the blank(s) with the appropriate word(s).
proenzyme
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The ________ zone extends from the trachea to the terminal bronchioles.
Fill in the blank(s) with the appropriate word(s).
The first step in oogenesis is when a
A. secondary oocyte divides to form a polar body and an egg cell. B. primary oocyte divides to form a secondary oocyte and a first polar body. C. corpus luteum becomes a corpus albicans. D. follicle becomes a corpus luteum.
You are counseling a pair of tired parents. All three of their children have been waking in the night frequently for the past few months. You ask them several questions about their parenting habits, which of the following might be the problem?
A. Their kids are growing. B. Their kids are going to bed hungry. C. Their kids are genetically predisposed to nightwaking. D. Their kids are talking too much before bed and becoming excited. E. Their nighttime baths are too hot, elevating their body temperatures.
Axonal transport ________.
A. can only transport signals in a retrograde direction B. has two fast and one slow components C. is a passive process D. uses molecular motors