13. A thick filament consists of
(A)actin and regulatory proteins.
(B)actin and myosin.
(C) myosin and regulatory filaments.
(D)actin.
(E)myosin.

9. When the concentration of glucose in the blood rises following digestion of a meal, what is the hormonal response? (A)Both glucagon and insulin are released. (B)The total amount of insulin in the blood decreases. (C) Glucagon is released but not insulin. (D)Insulin is released but not glucagon. (E)Neither glucagon nor insulin is released.

10.TRH is a type of _____ hormone secreted by the _____. (A)peptide... thymus (B)releasing... posterior pituitary (C) releasing... anterior pituitary (D)releasing... hypothalamus (E)steroid .. thyroid gland

11.The function of a sperm cell's acrosome is to (A)contain the fuel that powers the sperm. (B)fuse with the jelly coat of the egg cell. (C) carry the sperm's nucleus. (D)carry the sperm's helical mitochondria. (E)carry enzymes that are released to form a hole in the egg's jelly coat when the sperm encounters an egg.

複選題12. During transmission across a typical chemical synapse, (A)vesicles containing neurotransmitter diffuse to the receiving cell's plasma membrane. (B)neurotransmitter molecules bind to receptors in the receiving cell's plasma membrane. (C) action potentials trigger chemical changes that make the synaptic vesicles fuse with each other. (D)the binding of neurotransmitters to receptors initiates exocytosis. (E)neurotransmitter molecules are stored in the synaptic knob.

14. The synapses between neurons and muscle fibers are called (A)neuromotor junctions. (B)muscle synapses. (C) muscle junctions. (D)neuromuscular junctions. (E)musculoneural junctions.

15.Which of the following statements regarding behavior is true? (A)Fixed action patterns are learned behavior sequences. (B)A learned behavior triggers a fixed action pattern. (C) Innate behaviors are performed the same way in all members of a genus. (D)A fixed action pattern is under strong genetic control. (E)Innate behaviors are not related to genetics.

16. Lactose intolerance is the inability to (A)produce milk protein (B)digest cellulose (C) digest milk fats (D)produce lactose (E)digest lactose

17. Protein synthesis requires the use of mRNA, which (A)is made in the nucleolus (B)direct the degradation of DNA (C) is not essential to make proteins (D)is translated by the ribosomes (E)direct the replication of DNA

18.Oxygen crosses a plasma membrane by (A)osmosis (B)phagocytosis (C) active transport (D)pinocytosis (E)passive transport

19.During which phase of mitosis does the nuclear envelope re-form and the nucleoli reappear? (A)anaphase (B)metaphase (C) prophase (D)interphase (E)telophase