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• 12. When a neuron is at the potassium (K⁺) equilibrium potential,(A) its membrane potential is close
• 13. Most synaptic transmission in the mature human nervous system is mediated by(A) gap junction(B)
• 14. Which of the following neurotransmitters is associated with Parkinson's disease?(A) dopamin
• 15. Compared to humans, cats have excellent night vision. Which of the following might contribute to
• 16. The actual receptors for hearing are called(A) baroreceptors(B) nociceptors(C) Pacinian corpuscl
• 17. Which of the following statements regarding pulmonary ry surfactant is TRUE?(A) it is secreted b
• 18. After a normal tidal expiration, the amount of air remaining in the lungs is called(A) expirator
• 19. Which of the following conditions will increase oxygen released from hemoglobin?(A) fever(B) art
• 20. Testosterone binds to its receptor which(A) stimulates the production of cAMP(B) stimulates the
• 21. Which of the following pairs of the pituitary hormone and its downstream target gland (the third
• 22. The hyposecretion of glucocorticoids and mineralocorticoids results in(A) Addison's discase
• 23. A lower-than-normal concentration of plasma calcium causes(A) a decrease in bone resorption(B) a
• 24. Which of the following hormones increases water permeability of the collecting duct?(A) renin(B)
• 25. Which of the following increases glomerular filtration rate (GFR)?(A) Dilation of efferent arter
• 26. If the rate of urine formation is 2 mI/min, the urine inulin concentration is 25 mg'ml, and
• 27. The majority of renal reabsorption occurs in the(A) proximal convoluted tubule(B) loop of Henle(
• 28. Which of the following cells secrete estradiol?(A) theca cells(B) granulosa cells(C) oocytes(D)
• 29. Which of the following sex organs is derived from the Wolfian ducts?(A) epididymis(B) prostate(C
• 30. Secretion of luteinizing hormone (LH) is inhibited by(A) high concentrations of inhibin(B) rapid
• 31. The oral contraceptive pills contain___ , which mimic the hormone control of ovaries in the lute
• 32. Which of the following is the LEAST likely cause of hypotension?(A) Hemorrhagc.(B) Vomiting, or
• 33. Which of the following is the LEAST likely to result in edema ?(A) Liver cirrhosis.(B) Abnormal
• 34. Which of the following is true regarding baroreceptors?(A) Increasing the pulse pressure will in
• 35. Osmotic pressure within a capillary arises as a result of(A) the pressure created by fluid withi
• 36. Which of the following vasoactive factor is NOT produced by endothelial cells ?(A) NO(B) Atrial