SL/HL Topic C3.1 Integration of body systems

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1#

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1. Which endocrine glaxp)epayq -c qb8;;t +bnd secretes melatonin?

A. Pineal

B. Pituitary

C. Hypothalamus

D. Adrenal

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2#

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2. Which of the following are fu6n /h2j5zncbgnctions 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 following occur following the release of epinephrinepyf +r/ 3arh6bl7ze6p 5j8ax j (adrenalin)?rprj6 7l5 3f+ezh/bxy j6pa a8
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 voluntalqxt)u8mdxghxa*f0m , 63e)v ry 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 dx5k9 4sxmp0ad irection of the nerve impul4s5m pakx09d xses.
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 th2 .lqs ic6 qa1)1kfymbe brain

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9#

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7. Discuss the voluntary and involuntary roles of (ok3bl ej48 qxthe nervous system in the movement of food (lekxq 83jbo 4into, through and out of the intestines.

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10#

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8. A rise in blood pH, caused by an ink pcng w6f7pa2 8np90yvoik++ crease in carbon dioxide concentration, will cause an increase in breathing rate andy67i+ vn+pgpka0 ko2 wnpf c98 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 ethy8uyk1.buu,u,39 iya ootft-ene (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 intou9 c a(te 5bx,fp4tq6z the apoplast 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 devel .ytju7nqna6 dzy8n/5opment

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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 pov*fk;9xekbytba; iyzb2, e 4 *sitive phototropic response of a stem.

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