The mass number of an element is equal to the number of
A. protons plus the number of neutrons.
B. protons.
C. electrons plus the number of neutrons.
D. protons plus the number of electrons.
Answer: A
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The esophagus is a tube that carries food from the mouth to the stomach. It does not secrete any enzymes or absorb any nutrients, but it does need to stand up to significant friction and stress. The type of epithelium most likely lining the esophagus would be:
A) stratified squamous epithelium. B) cuboidal epithelium. C) simple squamous epithelium. D) transitional epithelium. E) simple columnar epithelium.
Most carbon dioxide is transported in the blood by:
a. the globin portion of hemoglobin b. dissolved in plasma c. conversion to bicarbonate ions d. the heme portion of hemoglobin e. bound to albumin in the plasma
Shock due to a problem with the pumping action of the heart (e.g., myocardial infarction, arrhythmias, ischemia) is:
A) obstructive shock B) vascular shock C) hypovolemic shock D) cardiogenic shock
Spermiogenesis is the last stage of meiosis.
Answer the following statement true (T) or false (F)