Select your answer:
Topics:
Pathophysiology of Injuries and Diseases Microrganisms Pulse Body Systems Skin Growth Disease, Immunity, and Phatogens Measles and Hib Proteomics and Immunology Dental Pharmacology Skull Osteoporosis Biotechnology: Tools & Techniques Biodiversity History of Healthcare Burns and Skin CancerOther quiz:
Cell Review › View
In passive transport, substances move across the cell membrane ________ the concentration gradient
A. AGAINST
B. ALONG
C. WITH
D. BETWEEN
Human Body › View
The alveoli in the lungs cover a approximate surface area of:-
A. 200 square metres
B. 500 square metres
C. 100 square kilometres
D. 100 square metres