SL/HL Topic C3.1 Integration of body systems

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1#

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1. Which endocrine gland seaq u(/(hg*2iy5eoyuxcretes 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 the 0ic23f- ) wucr, 7 xkdmdzg:+p zldbo+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 r .rk-a 1toifd.elease of epinephrine (adrenalin)? f-a koti..rd1
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 voluntary 8h)eum -hew1 lstimulation 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. The red arrj5k dvp;,7ra kows show the direction of the nerve impulses.k,pj ;vd ark57
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 theyuky;e q3zz.zr jo.(s 0f8 3wm brain

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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 +osy6q c*xu cb0 gp0ffzn1:p,the nervous system in the move0,1 yo sz*gn:f0q6b+ fpu cxpcment of food into, through and out of the intestines.

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10#

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8. A rise in blood pH, ca/kluoiugi1el,5 k,:o used by an increase in carbon dioxide concentration, will cause an increase in breathing rate and tidal volume. This often occurs due,iklgio5uu/l,1: ko ring 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 ethene vr)ksk ow1tm+.0-c pc(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 apoplast an xdn+;j1k ygs3n6i6o(b ;4j5aglcl v kd 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 andjzk5k*; mvl1*, /tjuba :ne *l,aum rz development

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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 andnlupkl5( bt +; the positive phototropic response of a stem.

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