Select your answer:
Topics:
Nervous System/Endocrine System Skills for Health Body Structures and Organ Systems Biotechnology and Genetic Engineering Genes and Cells Integumentary System Latin & Greek in Medicine Asexual/Sexual Reproduction Infectious Diseases Types of Medical Reports Pharmacology Vitamins Cosmetology Reproduction in Human Beings Musculoskeletal LE Cytology and HistologyOther quiz:
Types of Nutrients › ViewProteins are called
A. Energy-giving food
B. Body-building food
C. Protective food
D. All of the above
Respiration, Immune System, Blood Cells › View
Why do arteries have a thick muscle layer?
A. To provide energy for the blood vessel.
B. To prevent the blood flowing backwards.
C. To help withstand the high pressure blood, also to contract to control blood flow.