Answer the following statements true (T) or false (F)
1. The parathyroid gland is an endocrine gland found in the neck.
2. The hypothalamus is an endocrine gland found in the skull.
3. The pancreas is an endocrine gland found in the abdominal cavity.
4. The cardiovascular system includes the heart and blood vessels.
5. The primary function of the cardiovascular system is the regulation of body temperature.
1. TRUE
2. TRUE
3. TRUE
4. TRUE
5. FALSE
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Which factor contributes most to the determination of hair color?
A) the structure of the pigments produced by melanocytes at the papilla B) age of the individual C) air bubbles in the medulla of the hair shaft D) All of the answers are correct. E) None of the answers are correct.
The figure illustrates the layers of the epidermis. Which layer of the epidermis is "D"?
A. Stratum lucidum B. Stratum basale C. Stratum corneum D. Stratum spinosum E. Stratum granulosum
Chromosomes are composed mainly of DNA
Indicate whether the statement is true or false.
Why is the name "thrombocyte" inappropriate for platelets?
A. They are not very numerous. B. They have no nucleus. C. They have multiple nuclei. D. Their plasma membrane is irregularly shaped. E. They are smaller than erythrocytes.