Which of the following represents an endocrine secretion?
Answer: hormone secretion into THE BLOOD- not body surface or body cavities
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Which of the following connective tissue cells produces collagen?
A) adipocytes B) fibroblasts C) macrophages D) mast cells E) lymphocytes
Which phase of the menstrual cycle is characterized by the formation of new glands, thickening of the endometrium, and infiltration of blood vessels?
A) secretory B) menstrual C) luteal D) proliferative
The liver gets bilirubin from the
A. stomach B. gallbladder C. spleen D. small intestines
You are learning about an integral membrane protein. This protein has a region that is exposed to the extracellular fluid, a region that spans the membrane, and another region that is exposed to the intracellular fluid. Which of the following is likely TRUE of this protein?
A. It is a nonpolar molecule. B. It is an amphipathic molecule. C. It is a polar molecule.