The contractile unit of a skeletal muscle fiber is a(n) ____
a. myofibril
b. sarcomere
c. myosin filament
d. actin filament
e. Z line
ANSWER: b
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Phytoremediation uses the ability of plants to take up __________ dissolved in soil w What will be an ideal response?
ater.
Which of the following describes a way that breast cancer influences the physiology of the body?
A. Tumor growth that disrupts the ducts leading to the nipples may result in discharge leaking from the breasts. B. Breast cancer may cause fatigue and a lack of energy. C. The lymph nodes underneath the arms may become swollen and painful to touch, indicating the cancer has invaded them. D. Lumps may be found in breast tissue as tumors form and grow. E. Metastasis to the bones of the body can cause bone pain and easy fracturing. F. All of these choices are correct.
Using general principles to explain specific observations is called ________ reasoning.
Fill in the blank(s) with the appropriate word(s).
Oxidation involves the ________ , and reduction involves the
A) loss of electrons; gain of electrons B) loss of oxygen; gain of oxygen C) gain of electrons; loss of electrons D) gain of oxygen; loss of oxygen