What do smooth, cardiac, and skeletal muscle all have in common?
A. They all interlock at intercalated disks.
B. The cells of these muscles are all called muscle fibers.
C. They are all striated.
D. They are all uninucleated.
E. They are all found in the walls of blood vessels.
Answer: B
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Which of the following is the period of rest between meiosis I and meiosis II?
a. Interkinesis b. Synapsis c. Telophase d. Metaphase
If a strand of DNA has the nitrogen base sequence 5'-ATTTGC-3', what will be the sequence of the matching strand?
a. 3'-ATTTGC-5' b. 3'-GCAAAT-5' c. 3'-UAAACG-5' d. 3'-TAAACG-5' e. 3'-TUUUCG-5'
Which of the following statements about regulation of thyroid hormones is true?
a) TSH positively feeds back on the hypothalamus causing TRH release b) T3 and T4 negatively feed back on the pituitary to reduce TSH release c) T3 and T4 negatively feed back on the pituitary to reduce TRH release d) TSH negatively feeds back on the hypothalamus to reduce TRH release e) Both b and d are true
Potential energy:
a) is energy that changes into chemical energy only with very high temperatures b) transfers motion to matter. c) is contained in matter placed in certain positions or arrangements. d) contains less energy than kinetic energy. e) is kinetic energy that has not yet been turned to heat.