Which of the following cell part is described as a "fluid mosaic"?
(A) Chloroplast
(B) Vacuole
(C) Cell membrane
(D) Endoplasmic reticulum
Answer: (C) Cell membrane
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Sweating is initiated in response to a rise in body temperature that occurs on exposure to a hot environment. Evaporation of the sweat cools the body. This is an example of
a. negative feedback. b. positive feedback. c. a feedforward mechanism. d. an intrinsic (local) control mechanism. e. autoregulation.
The nerves and blood supply of the teeth are contained in the _____.?
A) ?periodontal membrane B) ?gingiva C) ?dentin D) ?pulp cavity
The epidermis is composed of ________
A) simple columnar epithelium B) stratified squamous epithelium C) adipose tissue D) areolar tissue E) dense fibrous connective tissue
Which of the following is NOT normally a route of transmission of HIV/AIDS?
A. unprotected sexual intercourse with an infected partner B. kissing or contact with items contaminated by the saliva of an infected individual C. across the placenta from an infected mother to her fetus during pregnancy or delivery D. via breast milk during nursing E. transfer of contaminated blood or blood products from one person to another