What ion is sometimes used as a second messenger of amino acid?based hormones?
A) iron
B) calcium
C) sodium
D) chlorine
B) calcium
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Answer the following statements true (T) or false (F)
1. There are about 206 bones in the human body. 2. Bones, ligaments, tendons, and cartilage are also included in the skeletal system. 3. The skeletal system assists in the formation of blood cells. 4. Cardiac muscle is the specialized muscle tissue of the heart. 5. Voluntary muscle is another name for smooth muscle.
What form of endocytosis do white blood cells use in order to engulf bacteria?
a. phagocytosis b. pinocytosis c. bactocytosis d. bacteriophage e. lymphocytosis
Lucy, a 35-year-old woman, says she CANNOT lose the fat around her abdomen because it is brown fat. You correct her by saying that the only people with brown fat are __________.
a. anorexic women b. teenagers c. elderly men d. infants
What type of cells form the proximal convoluted tubule?
A. simple cuboidal epithelium with microvilli B. stratified squamous epithelium C. pseudostratified ciliated columnar epithelium D. simple columnar cells with microvilli and cilia