Which of the following statements is NOT true of the endocrine system?
A. The organs of the endocrine system are widely dispersed in the body.
B. The endocrine system's secretions go into the bloodstream.
C. Endocrine glands secrete their products into ducts leading to body cavities.
D. Endocrine glands produce hormones.
Answer: C
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Which transport process is the main mechanism for the movement of most macromolecules by body cells?
A) phagocytosis B) pinocytosis C) receptor-mediated endocytosis D) secondary active transport
Which of the following statements is most accurate?
A) Muscle tension remains relatively constant during isotonic contraction. B) T tubules may be sliding during isotonic contraction. C) The I band lengthens during isotonic contraction. D) Myofilaments slide during isometric contractions.
The prefix ________ means "between," while the prefix ________means "within."
A) pre-; post- B) endo-; exo- C) hyper-; hypo- D) inter-; intra-
______ transports secretory vesicles along microtubules is
a. Actin b. Myosin c. Kinesin d. Tubulin e. Keratin