Steroid hormones are synthesized from ________
Fill in the blank(s) with correct word
cholesterol
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Answer the following statements true (T) or false (F)
1. Isotopes are different forms of the same element. 2. Sulfur 35 (35S) is an isotope of 32S. These elements differ in their number of neutrons. 3. Helium is an inert gas that rarely reacts with other elements because it has the maximum number of valence electrons in its outer shell. 4. If lithium has an atomic number of 3 then it will have 1 valence electron.
Which of the following ocular tissues and infections is mismatched?
A. Keratitis; infection of deep eye tissue B. Conjunctivitis; milky discharge and infection of eyelid lining C. River blindness; microfilariae visible in the vitreous chamber D. Trachoma; infection of epithelial cells
The functional barrier between blood and the brain is cerebrospinal fluid
Indicate whether the statement is true or false
Which of the following shows the correct complete classification of modern humans, from phylum to species?
a. Chordata; Primates; Marsupialia; Hominidae; Homo; Homo sapiens b. Vertebrata; Chordata; Carnivora; Primates; Sapienidae; Homo; Homo sapiens c. Chordata; Vertebrata; Mammalia; Primates; Hominidae; Homo; Homo sapiens d. Chordata; Mammalia; Eutheria; Carnivora; Sapienidae; Homo; Homo sapiens e. Vertebrata; Chordata; Mammalia; Carnivora; Hominidae; Homo; Homo sapiens