Interaction & Interdependence C.4 Chemical Signaling - 无忧得胜-网上国际课程 (5edu.win)

?作业考试练习?IB生物学?Interaction & Interdependence C.4 Chemical Signaling

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习题练习：Interaction & Interdependence C.4 Chemical Signaling

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The diagram represents the regulation .+ woaq iq,z(mq, 5eoyof glycogen metabolism by the epinephrine receptors. What occurs after cyclic AMP (cAMPy, oea(q.m qo5i+wqz ,) is formed?

A. Acts on ATP

B. Binds to G protein-coupled receptor

C. Activates G protein

D. Binds to an inactive protein kinase (PKA)

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Which of these is not an effect of testxnh)*xn f i**fre2j9 iosterone?

A. Development of testes

B. Development of embryonic gonads into testes

C. Sperm production

D. Development of secondary male characteristics

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A signalling chemical is needed to activate the G protein by bindild*;zhf p q uwtxi--u0xv(icy5;k.-1xlyqm0ng to the G pr-5ylp t iu(x*x;-my 0dvuq;fxz1-.l wqc0ihkotein-coupled receptor. What other substance is needed to activate the G protein?

A. GTP

B. cAMP

C. GDP

D. ATP

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Which of the following is an example of a yhf(wrn14;r2 r/keo u positive feedback mechanism?

A. Control of blood glucose concentration

B. Maintenance of body temperature in a homeotherm

C. Absorption of more water from the collecting duct as a result of ADH secretion

D. Increase of oxytocin bringing about further uterine contractions.

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Which labels represent positive and negative k:4sfb4ir2xz1hnw 1 ltci 40bfeedback?

A. I /IV

B. IV /II

C. II /III

D. II /IV

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Which of the following is only able to trigger a response in a cell by binrl qhv6uexu-z tyg.:(7t;,c m ding to a receptor ,hy7;cu (-x qg. t6mvtuzler :in the plasma membrane?

A. Insulin

B. Testosterone

C. Oestradiol

D. Progesterone

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Which of the following is true for hormones but not neurotransmitters?

A. They are signalling chemicals found in animals

B. They act on distant target cells

C. They are transmitted across a synaptic gap

D. They result in a short-term effect

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Which features describe the transmembrane receptor and intracellular ret/gv-) nz :bqhceptor?

A. Signalling chemical enters the cell and binds in the nucleus /Signalling chemical remains outside of the cell and binds with the receptor

B. Located in the cytoplasm /Located in the cell membrane

C. Transmembrane domain contains hydrophobic amino acids and extracellular domain contains hydrophilic amino acids /Domain contains hydrophobic amino acids

D. An example is G protein-coupled receptor /An example is the tyrosine kinase receptor

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Which feature correctly describe+xodu:jaav2 zysa h( s,n7/ *hs the binding of a ligand to a receptor?

A. Receptors can bind to any ligand.

B. Both the ligand and receptor must have a complementary shape.

C. All ligands can penetrate the cell to bind with intracellular receptors.

D. All ligands bind irreversibly to receptors.

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The diagram shows a flx ru-b :a153 6tivtpexjb,l7 wow chart.

Which is the correct sequence of reactions shown in the flow chart?

A. B. C. D.

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问答题 ( 1.0 分) 切至整卷模式搜藏此题

1.Compare and contrast transmembrane recepto56bo pcdtx 6om4es*.syoqem 2/h;nnm/g+i) ors and intracellular receptors.
2.Outline the variety of signalling chemicals in animals.
3.Describe the mechanisms by which both transmembrane and intracellular receptors can bring about a cellular response, using one named hormone for each type of receptor.

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