Select your answer:
Topics:
Auditory and Vestibular Neurology The Microbial World Advanced Stretching SM2 Inherited & Acquired Traits EKG Medical Term DNA Eye in Color Vision Male Reproductive System Ankle, Foot, & LL - Injuries Diseases of The Digestive System Child Growth and Development The Respiratory System Pathogens, Disease and Immunity Blood Donation Child DevelopmentOther quiz:
Transportation › ViewWhich blood vessel has valves to prevent the back-flow of blood?
A. Veins
B. Arteries
C. Capillaries
Biology › View
………… is the movemnt of any substance across the cell membrane by using chemical energy.
A. diffusion
B. selective permeability
C. osmosis
D. active transport