What is the most common transport mechanism by which glucose and other organic solutes cross the luminal membrane of an epithelial cell layer?
A. secondary active cotransport with Na+
B. glucose ATPase pump
C. facilitated diffusion
D. simple diffusion through the paracellular pathway
E. through an ion channel
A
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Which of the following statements concerning control of blood flow through arterioles is TRUE?
A. Beta-adrenergic receptors are more abundant on most arteriolar smooth muscle than are alpha-adrenergic receptors. B. Body-wide constriction of arterioles results in a decrease in the total peripheral resistance (TPR). C. Binding of epinephrine to alpha-adrenergic receptors causes vasodilation. D. If the arterial blood pressure to an organ suddenly decreases, arterioles in the organ will dilate in response. E. Increased stimulation of vascular smooth muscle by the parasympathetic nervous system causes increased vasoconstriction.
Your patient has been complaining about headaches, light-headedness, upset stomach, weight loss, and a rapid heartbeat. You run some tests and notice that the patient's stomach lining has thinned; you also suspect that he has a Vitamin B12 deficiency
Which of the following digestive cells least likely contributes to your patient's condition? A) Endocrine cells B) Chief cells C) Parietal cells D) Mucous cells
Which structure prevents the heart valves from opening the wrong way?
a. trabeculae carne b. chordae tendineae c. pectinate muscles d. fossa ovalis
If lung disease results in an arterial PO2 of 80 mmHg, the total amount of oxygen carried by the blood is 20% below normal
Indicate whether the statement is true or false.