Select the correct statement regarding the cells of connective tissue.
A) Connective tissue does not contain cells.
B) Connective tissue cells are nondividing.
C) Chondroblasts are the main cell type of connective tissue proper.
D) "Blast" cells are undifferentiated, actively dividing cells.
D) "Blast" cells are undifferentiated, actively dividing cells.
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Which of the following bone markings on the scapula is an indentation into which the head of the humerus fits?
a) Coracoid process b) Glenoid cavity c) Acromion d) Scapular notch e) Supraspinous fossa
What happens to testosterone as a man ages?
A. It increases as men get older. B. It does not change as men get older. C. It decreases as men get older. D. Age does not determine whether testosterone increases or decreases.
What is the correct sequence of events along an axon that follows a membrane reaching threshold potential?1. The membrane depolarizes.2. Sodium channels open and sodium ions diffuse inward.3. The membrane repolarizes.4. Potassium channels open and potassium ions diffuse outward.
A. 3, 2, 4, 1 B. 1, 2, 4, 3 C. 2, 1, 4, 3 D. 4, 1, 3, 2
An example of a genotype would be ________, and an example of a phenotype would be ________.
A. genes; alleles B. Ff; ff C. having freckles; Ff D. Ff; having freckles