The origin of the 46 chromosomes in a human zygote is
A. half from the sperm and half from the egg.
B. all from the egg.
C. all from the sperm cell.
D. half from DNA and half from RNA.
Answer: A
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Match the proenzyme on the left (1-3 ) with the correct enzyme activator on the right (4-6). 1. pepsinogen 4. enteropeptidase 2. trypsinogen 5. hydrochloric acid 3. procarboxypeptidase 6. trypsin
A) 1 and 6; 2 and 5; 3 and 4 B) 1 and 4; 2 and 5; 3 and 6 C) 1 and 4; 2 and 6; 3 and 5 D) 1 and 5; 2 and 6; 3 and 4 E) 1 and 5; 2 and 4; 3 and 6
Which of the following movements does NOT take place at a saddle joint?
a) circumduction b) rotation c) abduction and adduction d) flexion and extension
The physician knew her patient was most likely a child before she walked into the examination room because the X-ray revealed a(n) ________
A) impacted fracture B) compression fracture C) comminuted fracture D) greenstick fracture E) open fracture
A urinary tract infection that invades the urinary bladder is called
A. cystitis. B. urethritis. C. pyelonephritis.