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PANITIA BIOLOGI NEGERI KELANTAN 2007
CHAPTER 12: COORDINATION AND RESPONSE
Objective Items12.1Coordination And Response1.Specialised endings of nerve fibre that detect information are called.
D.The integrating centre
2. The afferent pathway is the transmission of nerve impulses from the
A.Effectors to the sensory receptors B.Integrating centre to the effectors C.Sensory receptors to the effectors
D.Sensory receptors to the integrating centre
3. What is meant by stimulus?
A.A change in the level of the factor being regulated
B.A structure to detect an environmental change
C.To enable the receptor to detect changes brought about by the effectors
D.To receive integrate information and to trigger action that will correct the change in stimulus
4.The figure shows a biological control system.
What could be P, Q and R?PQR
5.Coordination and response are carried out by the
A. I and III only
B. I and IV only
C. II and IV only
D. III and IV only
12.2The Role Of The Human Nervous System6.What is the function of cerebrum?
A. Initiates and controls all voluntary actions
B. Coordinates movement and maintains body balance
C. Controls and coordinates all involuntary actions
D. Controls all voluntary and involuntary actions
7.Which of the following is an example of a voluntary action?
A. Knee jerk reflex
B. Dilation of eye pupil in a dark room
C. A boy kicks a ball
D. Quick withdrawal of the hand when it touches a hot object
8.Which of the following parts of the brain plays a regulating role in homeostasis?
B. Medulla oblongata
D. Cerebrum9.Which of the following are true about synapses?
IA synapse is a narrow space between two neurons
IIA neuron may has a synaptic connection with many other neurons
IIINerve impulse can only flow through synapse in one direction
IVThe transmission of nerve impulse across a synapse can be affected by drugs
A. I and II only
B. II and IV only
C. I, II and IV only
D. I, II, III and IV
10.Some nerves carry impulses much faster than others. What could be the reason for the difference?
A.This nerve has a very short axon
B. These nerves are made of myelinated neurons
C. The absence of myelin sheath speed up nerve impulses
D. The neurons in these nerves have more dendrite than others
12.3The role of hormones in humans11.Which of the following is a correct match between the endocrine organ that produces the hormone insulin and its target organ?
Endocrine organTarget organ
DPituitary glandSkeletal muscle
12.The suitable hormone to treat a person who suffers dwarfism is
A. Sex hormone
B. Growth hormone
D. Adrenocorticotrophic hormone
13. The table shows the effects of hormone X
Produced by corpus luteum or placenta
Promotes growth of endometrium and prevents menstruation
What is X?
C. Luteinising hormone
Follicle-stimulating hormone14. Which of the following is not a difference between the nervous system and the endocrine system?
Nervous systemEndocrine system
AConsists of neurons Consists of ductless glands
BImpulses transmitted along neurons Hormones are transported by blood
CQuick responseRequires a longer time
DMany effects are generally long lastingMany effects are usually not long lasting
15A person is chased by a fierce dog. What are the reactions in the persons body?
.I The metabolic rate increases
II The body temperature decreases
III The blood glucose level increases
IV The rate of heartbeat decreases
A. I and III only
B. I and IV only
C. II and IV only
D. I,II and III only12.4 Homeostasis In Human16Which of the following is an example of homeostasis?AThe maintenance of body balance
BThe secretion of saliva at the side of food
CThe secretion of insulin after a meal
DThe absorption of digested food by the small intestine
17.The urine of a diabetic is likely to contain an abnormal amount of
18.The pituitary gland is often referred to as the master endocrine gland, this is because
AIt is the largest gland in the body
BIt is located in the brain
CIt is the most productive endocrine gland
DIt controls many other endocrine glands
19Which of the following shows the correct sequence of three stages involved in the formation of urine?
AUltrafiltration, reabsorption, active secretion
BUltrafiltration, active secretion, reabsorption
Cactive secretion, ultrafiltration, reabsorb
Dactive secretion, reabsorb, ultrafiltration
20What changes are likely to occur when a person walks from a very cold room into a hot kitchen?
SweatingShiveringSkin blood vessels
12.6 Plant Hormone21Which of the following plant hormones induce parthenocarpy ?
22Which of the following statements is not true about plant tropism
A.The response is towards a unilateral stimulus
B.The directions of response is determine by the directions of an external stimulus.
CTropism is a growth response of the whole plant to external stimuli.
DPhototropism is cause by uneven distribution of auxins.
23 Phytohormone X is a gas produced in plant tissues. It promotes fruit ripening. What is X?
24 Which of the following is naturally occurring auxin ?AIndoleacetic acid
DCytokinin 25Which of the following is not a correct match?HormoneEffect
AAbsicic acidStimulate stomatal opening
CGibberellic acidStimulates elongation and growth of stem
DEthenePromote food ripening
Structured Items12.2The Role of the Human Nervous System
1.The diagram below shows a cross section of the spinal cord of a small mammal.
(a).Name the structure labeled X and Y
(b).On the diagram, draw and label the neurons involved in the pathway of nerve
(c)Describe the pathway involved in the transmission of nerves impulses which result in the reflection when a hot object was touched.
(d)Explain the effects or responses if the efferent neuron is damaged
[2 marks]12.3The Role Of Hormones In Humans2.
(a)Name the endocrine glands labeled P, Q, R, S and T
[3 Marks]P: Q: R: S: T: (b)Name a hormone that is produced by the main gland that control the secretion of
[1 Mark]..(c).Name a hormone that is secreted by gland Q
(d)State two functions of the hormone in question c
(e)Explain what would happen if a diet for a young child is deficient in iodine
(f)State the effect of hormonal imbalance of insulin
12.4 Homeostasis in Human3. An experiment was carried out to determine how the level of glucose in the blood varies in a normal person. Blood samples were taken every two hours for a period of 14 hours. During this period, three meals were taken: breakfast 0700, lunch at 1300 and tea at 1700. The results are tabulated in table 1TimeBlood glucose level (mmol / dm3)
a. Plot a graph of blood glucose level against time [3 Marks]
b. Base on the graph; explain the changes of the blood glucose levelI. Between 0700 and 0900 hours
....II. Between 0900 and 1300 hours
....III. Determine the blood glucose level at 1200
....[3 Marks]c. Explain how the changes in b) I and b) II are brought about?
[4 Marks]Give two reasons why the blood glucose level after breakfast differs from that after tea
.... ........ ....
[2 marks]012.6 Plant Hormone5. The statements below refer to some effects of two groups of plants growth substances, auxins and gibberellins. If the statement is correct place a tick () in the appropriate box and if the statement is incorrect place a cross (X) in the appropriate box
Promote cell elongation
Promote root formation in cuttings and calluses
Promote fruit ripening
Inhibit lateral bud development
Promote the breaking of dormancy in seeds
a) Graph shows the effects of different concentrations of auxin on the growth responses of shoots and roots. Using the information from the graph, what are the optimal auxin concentration for maximum shoot growth and root growth?
[2 marks]Shoot: ..Root: ..b) State two differences between responses of shoot and root growth
[4 marks]Essay Items12.2The Role of the Human Nervous System
1(a)(i)What is meant by the term of synapse
(ii) Explain the event as a nerve impulse is transmitted across a synapse
[4 marks](b)Alzheimers and Parkinsons diseases are related to nervous system. Explain the causes and the effects of the diseases on victims.
[4 marks](c)In an accident, a motorist was seriously injured and was sent to a nearby hospital. A doctor is going to do a knee jerk test to examine the patients nerve system. Draw the reflect arch and describe the pathway involved in the transmission of nerve impulses which result in the reflect action.
[10 marks]2(a)The pituitary gland is regarded as the master endocrine gland
Explain the statement above
[2 Marks] (b) After watching a horror movie at a cinema, Salim went back to his home. On the way home, he saw a monster exactly the same as he watched in the movie. He was very shocked and frightened. So he ran away as fast as he could.
Explain the involvement of both the nervous system and the endocrine system in that critical situation
(a)Explain how the body of a healthy person restores the blood sugar level to
normal if the level drops too low
(b)(i)Complete the diagram and state the role of the nephron
(ii)Describe the urine formation
[10 marks]4 (a) Explain the terms:
(b)Explain the role of auxins in tropism
(c)State 3 types of hormones and its uses in agriculture
[6 marks] X
PAGE 12-2BIOLOGY QUESTIONS BANK