Which blood vessel has the highest concentration of carbon dioxide?

Select one:
a. pulmonary artery
b. pulmonary vein
c. aorta
d. renal vein
e. hepatic portal vein


a. pulmonary artery

Biology & Microbiology

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A group of specialized cells of similar structure and function is a(n) ____

a. organ system b. cell cluster c. organ d. tissue e. organism

Biology & Microbiology

If you applied a toxin that blocked non-voltage-gated potassium channels (i.e., the potassium "leak channels") in a resting neuron, it would cause the membrane potential to be

A. No change would be observed. B. less negative. C. more negative.

Biology & Microbiology

Which of the following hormones is not involved in stimulating spermatogenesis?

a. inhibin b. follicle-stimulating hormone c. interstitial cell stimulating hormone d. luteinizing hormone e. testosterone

Biology & Microbiology

The condition where tissue from the uterine lining grows outside the uterus is called ______________

A. endometriosis B. pelvic inflammatory disease C. uterine prolapse D. ectopic pregnancy

Biology & Microbiology