Which of the following component of the eye contains the photoreceptors?
a) The iris
b) The ciliary body
c) The retina
d) The lens
Answer: c) The retina
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The warm-up period required of athletes in order to bring their muscles to peak performance is called ________.
A) twitch B) wave summation C) treppe D) incomplete tetanus
The medical term for heart attack is
A) heart failure. B) heart block. C) heart murmur. D) fibrillation. E) myocardial infarction.
All of the following statements describe functions of water except which one?
A. Water is used to transport nutrients and wastes in blood plasma. B. Water aids in chemical reactions as in saliva during digestion. C. Water chemically bonds molecules to form electrolytes. D. Water works as a lubricant in tears and the fluid of joints.
The epidermis is formed of ________ epithelium, and its superficial layer consists of dead cells filled with ________.
A. stratified columnar; keratin B. stratified columnar; fat globules C. stratifed squamous; keratin D. stratified squamous; fat globules