One of the major differences between skeletal muscle and cardiac muscle is that cardiac muscle
A) lacks triads.
B) needs Ca2+ to contract.
C) has myosin and actin.
D) has a very large sarcoplasmic reticulum.
E) is striated.
A) lacks triads.
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Extracellular matrix consists of
A) lacunae and lamellae. B) heparin and keratin. C) ground substance and protein fibers. D) fixed cells and wandering cells.
During platelet plug formation, platelets release ________ and endothelial cells release ________, which lead to vasoconstriction.
A. thromboxane; endothelin B. endothelin; thromboxane C. histamine; heparin D. erythropoietin; thromboxane E. thromboxane; histamine
Which of the following papillae found on the surface of the tongue contains no taste buds, but does contain sensory nerve endings to detect the temperature and texture of food?
A) filiform papillae B) fungiform papillae C) foliate papillae D) vallate (circumvallate) papillae
True or False? The importance of O2 in the human body is to extract energy (ATP) from food molecules.
Answer the following statement true (T) or false (F)