production of blood cells (hematopoiesis) occurs in the ____ system.
-endocrine
-integumentary
-skeletal
-cardiovasular
-skeletal
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Which vein directly drains the blood returning from the face and scalp?
A. Internal jugular vein B. External jugular vein C. Internal carotid veins D. External carotid veins
Which of the following statements concerning pulmonary surfactant is incorrect?
a. It is secreted by Type II alveolar cells. b. It is deficient in newborn respiratory distress syndrome. c. It promotes elastic recoil of the lungs. d. It reduces the cohesive force between water molecules. e. It reduces surface tension.
Which bones develop from pharyngeal arches?
A. Most of the bones of the calvarium B. Bones of the base of the cranium C. The sphenoid and ethmoid D. The temporal and occipital E. The facial bones
The biogenic amine, __________, is important for invertebrates as a neurotransmitter
A) Epinephrine B) Norepinephrine C) Thyroid hormone D) Octopamine Fill in the blank with the correct answer.