The feature of the eye that converts light rays to nerve impulses is the
A. pigmented layer of the retina.
B. sclera.
C. conjunctiva.
D. cornea.
E. neural layer of the retina.
Answer: E
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Endochondral ossification ________, whereas intramembranous ossification ________.
A. forms bone in broad, flat areas of the skull; occurs in the limbs B. inhibits osteoblast activity; activates osteoclast activity C. activates osteoclasts; inhibits osteoblast activity D. replaces hyaline cartilage; replaces undifferentiated connective tissue
Nuclei within the gray matter of the spinal cord that receive information from sensory receptors such as pain or pressure receptors in the skin are _____ nuclei
A. visceral sensory B. somatic sensory C. autonomic motor D. somatic motor
In a typical atom with three positively charged protons, how many negatively charged electrons would be present?
A. 0 B. 1 C. 3 D. 4
During spermatogenesis
a. FSH is required for spermatid remodeling. b. spermatogonia divide by mitosis c. testosterone is essential for both mitosis and meiosis of the germ cells. d. both (a) and (c) above. e. all of the above