SL/HL Topic C3.1 Integration of body systems

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1#

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1. Which endocrine gland secreter;9 24 b0 0* wn*uqbx7glhltp dezw7aos melatonin?

A. Pineal

B. Pituitary

C. Hypothalamus

D. Adrenal

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2#

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2. Which of the followingvxwsz3 z xm+0i 81lq,k are functions of the 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 followingxs+h9 r)t)(4xwwf z oq occur following the release of epinephrine (adrenalin)? xx(q 4fr sthw9o+))wz
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 :,7dndlw drx3l 3ii.b *9qg9mpkgf4ninitiates voluntary 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. The red arrows show the directiyh4e s 33ezeibsb;-/ w/+- pwe qvp)hkfi-ne( on of the nerve impul s+p-ze f / v-ei (wbnki3e-bqhe;yes3ph w)/4ses.
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 f7gg ilnq/2 p6o/kv1 xbrain

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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 ne9a tk ,t7hdwpm0ir9v4rvous system in the movement of food into, through and out i 7, ah9pt4tdkvrw90mof the intestines.

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10#

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8. A rise in blood pH, caused by an increase in carbon dioxide cma5*r5dju f0sd j )d2.r uxul.oncentration, will cause an increase in breathing rate au).2.d0ajmru l*5jx5suf d r dnd 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 ethene .vkmj u-r6u;s hiy0) 4ueql*r(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 and developcnr0g7 ji-i o(g8e2pg ment 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 aln*v cg mp(*h6wxo)+0kx0e l mnd 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 and the positive qk ,i/w 5ec z8y(m2hxxphototropic response of a stem.

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