Which of the following bases is unique to DNA?
a. adenine
b. cytosine
c. guanine
d. thymine
e. uracil
D
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Answer the following statements true (T) or false (F)
1. A tropic hormone causes another endocrine gland to release its hormone or grow. 2. The target organ for TSH is the thyroid gland. 3. ACTH stimulates the adrenal glands to release adrenaline. 4. FSH is frequently called the ovulating hormone. 5. The target organ for FSH is the ovarian follicle.
Cell membranes are said to be ________ because they allow some substances to pass but not others.
Fill in the blank(s) with the appropriate word(s).
Pulmonary ventilation is another term for gas exchange between the alveoli and the blood.
Answer the following statement true (T) or false (F)
What are the smallest conducting passageways of the lungs?
A) main (primary) bronchi B) alveoli C) terminal bronchioles D) alveolar ducts