The blood vessel that is formed by the joining of the vertebral arteries and supplies blood to the circle of Willis from the posterior side is the
A) internal carotid artery.
B) middle cerebral artery.
C) anterior communicating artery.
D) basilar artery.
E) ophthalmic artery.
Answer: D
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Answer the following statements true (T) or false (F)
1. The primary source of energy used by the body is a carbohydrate. 2. The only group of organic compounds that contains sugar are the carbohydrates. 3. A centimeter is about 2.5 inches in length.
A substance that dissociates into cations and hydroxyl ions is:
a. an acid b. a base c. a salt d. water
In the iodine (IKI) test, a blue-black color indicates that
A. lipids have not been broken down. B. proteins have not been broken down. C. proteins have been broken down. D. starch has not been broken down. E. starch has been broken down.
Cytotoxic T cells kill body cells by phagocytosis
Indicate whether the statement is true or false.