Which of the following is not a property of the blood-brain barrier?
A) The capillary endothelial cells are interconnected by tight junctions.
B) It is very permeable to many water and lipid-soluble compounds.
C) Astrocytes surround the CNS capillaries.
D) It is absent in portions of the hypothalamus.
E) It is intact except in areas known as circumventricular organs.
B
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Which of the nitrogenous bases is part of RNA but not DNA?
A) Guanine B) Uracil C) Thymine D) Cytosine
Fibrous cartilage discs that act as shock absorbers in joints are called
A) menisci. B) bursae. C) tendons. D) intervertebral discs. E) synovial capsules.
When a person is infected with a virus, but does not develop symptoms of that virus, the person is said to be ____________________.?
Fill in the blank(s) with correct word
Which joint consists of two separate articulations, one of which includes a sesamoid bone?
A) Shoulder B) Hip C) Elbow D) Knee