Which of the following is not a symptom of a heart attack?
A. nausea and vomiting
B. dizziness
C. diarrhea
D. shortness of breath
E. feeling of pressure in the chest
Answer: C
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What initiates the sodium-potassium pump?
A. Three sodium ions bind to the cytoplasmic side of the protein. B. Three sodium ions are translocated out of the cell. C. Phosphorylated pump has low affinity for sodium allowing sodium to leave and potassium to bind. D. Two potassium ions are transported into the cell. E. ATP binds to the protein which becomes phosphorylated (ADP is released).
Respond to statements 108–112 with reference to the five terms
listed below. a. zygote b. blastula c. cleavage d. gastrula e. somites M 108. This stage appears as a multicell, fluid-filled ball. E 109. This is the fertilized egg. D 110. This is the division of the zygote. D 111. Its cellular descendents give rise to all tissue and organs. D 112. This is a longitudinal series of paired segments.
The meiotic process in humans that results in the production of sperm is
A. oogenesis. B. mitosis. C. spermatogenesis. D. polar body formation.
A mature ovary, specialized as a vessel that houses and protects seeds, is a
A) fruit. B) ovule. C) cotyledon. D) seed coat.