SL/HL Topic C3.1 Integration of body systems

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1#

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1. Which endocrine gland secretes 4 zwxtiy1m9vasiztu7,( o5(e 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 qd /2j ok(jm e0g*cs5hthe 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 ofg ;bvy mzp5h5j ,-)2v,mdusvdc;qhp5 epinephrine (adrenalin)?v-vm;55vz qp ;du,jpc b,52)yhhsgm d
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 bra;31 gt 8coldnain initiates 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 directi4 3ie gb bl3o kq1/w)bt8sk(tw)ifs8eon of the nervse b4 i(qioet kg8k3b b)fs8/wt)3l 1we impulses.
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 thetnw 94k1yhawg. 8+(r i)6cs)t c h hz;z8nxysg brain

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9#

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7. Discuss the voluntary and invo ug6yvbb5 -ck f0*q/yjluntary roles of the nervous system in the movement of food into, through and out of the intestine/cf0bqk vg-5byj 6*yus.

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10#

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8. A rise in blood pH, caused rqc)49ly2q0uc 4w xzu by an increase in carbon dioxide concentration, will cause an increase in brc qu2qx0lu zw44 9)cyreathing 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 ethene (ethylene) productio+ ;ak q(ml9j tu2sy)uk646q alhuqf.h n.

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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 cch-5 adde,qpc m+ 7a0*2vtxband 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 growt yl, 5-ht0dd m bpfx*mz;)9egeh and 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 phototropic response ofwoqt-;3ys /ja a stem.

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