Which of the following is the first response a neuron makes to a stimulus?
a. Sodium ions enter the cell.
b. Sodium ions leave the cell.
c. Potassium ions enter the cell.
d. Potassium ions leave the cell.
e. Calcium ions leave the cell.
A
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Which of the following lists the structures of the male reproductive tract in the proper order from sperm production to ejaculation?
A. vas deferens, epididymis, seminiferous tubules, ejaculatory duct, urethra B. seminal vesicles, vas deferens, prostate, urethra, ejaculatory duct C. seminiferous tubules, epididymis, vas deferens, ejaculatory duct, urethra D. vas deferens, epididymis, seminal vesicles, ejaculatory duct, urethra E. epididymis, seminiferous tubules, ejaculatory duct, vas deferens, urethra
Which of the following relationships is accurate?
a. insects: Malpighian tubules: urea as major nitrogenous waste
b. annelids: protonephridia: ammonia as major nitrogenous waste c. freshwater fish: kidney: large volume of hypertonic urine d. sharks: kidney: large volume of hypotonic urine e. earthworm: kidney: ammonia as major nitrogenous waste
M. J. Berkeley demonstrated that the great potato blight of Ireland was caused by a water mold (then thought to be a fungus).
Answer the following statement true (T) or false (F)
Describe the process by which gut epithelial cells use transporters to take up ingested glucose (against the concentration gradient) and to distribute glucose to other tissues by moving it back out of the cell (down the concentration gradient)
What will be an ideal response?