There are three types of skin cancers. Which one(s) are derived from epithelial cells of the epidermis?
a. squamous cell carcinoma
b. basal cell carcinoma
c. both types of carcinoma (basal cell and squamous cell)
d. melanoma
Answer: c. both types of carcinoma (basal cell and squamous cell)
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Damage to the cortical region of the representational hemisphere can cause dull, emotionless speech. This condition is called
A. hemiballismus. B. ataxia. C. aprosody. D. dyslexia. E. agnosia.
What anchors the periosteum to the bone tissue beneath it?
A. Long collagen fibers that penetrate tendons B. Perforating fibers C. Haversian fibers D. A thin layer of hyaline cartilage E. Perforating blood vessels
Two receptors, A and B, can bind the same chemical signaling molecules but the concentration of those molecules required to reach 50% saturation is twice as great for receptor B. Therefore, the receptors have the same ________, but different ________.
A. affinity; competition B. specificity; affinity C. affinity; specificity D. specificity; saturation E. competition; affinity
By the time the conceptus arrives in the uterus, it consists of at least ________ or more cells.
A. 2 B. 8 C. 16 D. 32 E. 4