In the human eye, most refraction occurs when light passes through the
A) iris.
B) cornea.
C) lens.
D) aqueous humor.
E) vitreous humor.
Answer: B
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The hormones that are important for coordinating the immune response are
A) thymosins. B) corticosteroids. C) aldosterones. D) thyroxines. E) somatotropins.
Which of the following is not a function of a membrane?
a. Cover and protect the body surface b. Secrete a fluid that reduces the friction of the beating heart c. Lining cavities of the body d. All of the above are functions of a membrane
The ____________________ is the layer of the eye that contains the photoreceptor cells
Fill in the blank(s) with correct word
The currently accepted clonal selection theory proposes that diverse B lymphocytes are produced during fetal development, each capable of synthesizing an antibody against a particular antigen before ever being exposed to it
a. True b. False Indicate whether the statement is true or false