SL/HL Topic C3.1 Integration of body systems

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1#

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1. Which endocrine gland secrend +0.e+ v ml1b2rrkeloo4j (htes melatonin?

A. Pineal

B. Pituitary

C. Hypothalamus

D. Adrenal

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2#

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2. Which of the following are functions of thy h 3;zmyy g0k,aus4;we cerebellum?
I. Coordination of skeletal muscle contraction.
II. Voluntary movement of the limbs.
III. Maintenance of balance.
IV. Perception of pain.

A. All of the above.

B. I and III only.

C. II and IV only.

D. I only

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3#

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3. Which of the following occur following the release of epinephrine (adrenalinolyt y70b)o6t2+qzfx )?x0f6 t z l2t)oyyob+q7
I. Increase in blood pressure.
II. Conversion of glucose to glycogen in muscle cells.
III. Decrease in blood circulation to the intestines.
IV. Dilation of the bronchioles.

A. All of the above.

B. II and III only.

C. I and IV only.

D. I, III and IV only

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4#

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4. Which area of the brain initiates vo6 as6*,v rjbmp/n a7+qves3 fdluntary stimulation of skeletal muscle?

A. Cerebral hemispheres.

B. Corpus callosum.

C. Medulla.

D. Cerebrum.

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5#

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5. The diagram shows a spinal reflex arc. Th0 l0(/p4fka qife( (b zduet1 i5kvb;ue red arrows show the direction of the nerve impulsesk d5pf a0b1 ;/z0k tl(iu(ueb(fe qi4v.
In the table below, give the labels of the numbered components of the reflex arc and outline their function.

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6#

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6. Outline the role of the following in the control of the heart rate.

I. Baroreceptors

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7#

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6. Outline the role of the following in the control of the heart rate.

II. Chemoreceptors

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8#

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6. Outline the role of the following in the control of the heart rate.

III. The medulla of the mr + e/s ma2.jvht7f7abrain

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9#

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第 3 题组 (共 2 题 2 分)

7. Discuss the voluntary and involuntary roles of the nervous system in thx,(w eps- i e5nl 2j/25j71 jj zbtydo9frfth/e movement of food into, through and out of tt29j,wfj72l nf5osd(1y/ije/hep t5j- brxzhe intestines.

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10#

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8. A rise in blood pH, ck+6 -fcfq3ybuaused by an increase in carbon dioxide concentration, will+ f3kquy6f b-c cause an increase in breathing rate and tidal volume. This often occurs during exercise.

Outline how feedback control mechanisms restore the breathing rate and tidal volume to resting levels while resting after exercise.

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11#

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9. Plant growth is coordinated by various signalling chemicals. These chemicals cause growth responses which require a coordinated response. Outline how coordination is achieved in the following responses:

a. Fruit ripening and jf: 7g yy ,htu-n5,mim1byxr71m,ddl ethene (ethylene) production.

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12#

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9. Plant growth is coordinated by various signalling chemicals. These chemicals cause growth responses which require a coordinated response. Outline how coordination is achieved in the following responses:

b. Auxin secretion into the apjwp *0;o) d8rm ju:xipoplast and development of plant cells.

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13#

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9. Plant growth is coordinated by various signalling chemicals. These chemicals cause growth responses which require a coordinated response. Outline how coordination is achieved in the following responses:

c. Shoot and root growth and developmentnqls h y-q:lu kprsyr7a(9,d 1y4,sc8

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14#

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9. Plant growth is coordinated by various signalling chemicals. These chemicals cause growth responses which require a coordinated response. Outline how coordination is achieved in the following responses:

d. Auxin effluent pumps and the positive phototropic response of a stem f/d/wl ;j/dwqvb8(dci3 bhk) .

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