15
Life Processes in Living Organisms
IMPORTANT POINTS
Transportation pantolake pa through xylem and phloem. Xylem transpo Po transports food prepay ng at Plants do Other substances are stored in the vacuoles parts fall off periodically incoles and in the bulb of Amorphophase we d stored They are called rephides. They cause itching while cutting Some waste products of plants are useful to humans of br In Humans, kidneys are the main organs in the extory syst. Hephron i of kidney When blood passes through glomerulus is nered and we produc are collected in Bowman's capsule, Further, those products for urms whe through urethina If the kidneys are adversely affected by injury, infection or decreased blood supply, hey function property In such a case, dialysis of blood needs to be done in this process, th is circulated through dialysing maschine which separatos out the nitrogenous w Systematic regulation of different processes can be called control and bringing about the processes in the proper sequence can be called as coordination. Proper coordination bewoon various systems of an organism helps to maintain a state of Puced homeostasis Homeostasis is necessary for the optimal efficiency of the bo plents, there two types of movements. One is growth-relevant movements and the growth-inslovard movements >Movements of any part of the plants in response to an external stimulus in called as tro trople movements The growth of shoot is in response to stimulus of light. It is called as phototropic move roots grow towards the gravity and water These movements are called gravitropic and pic movementspectively. The growth of the pollen tube towards the ovule is called che The chemical coordination in plants is with the help of hormone The coordination and control in human beings is done by two systema (1) Nervous o (2) Chemical control. Nervous control is done with the help of nervous system. Neurons are the structural units of nervous system Neurons are of three types (1) Sensory neurons-They conduct impulsus from senco the linin and spinal cord (2) Motor neurons-They conduct impulses from the bra cond to effector organske muscles and glanda (3) Association neurona - They function of integration in the nervous system Human nervous system is divided into the following uns party (1) Central nervou Peripheral nervous system (3) Autonomic nervous system The central nervous system consists of brain and spinal cord feripheral
SPECIMEN QUESTIONS
(1)The network of capillaries in Bowman's capsule is called as- glomerulus
(2) kidney
(3) medulla
(4) cortex
Explanation: The network of capillaries in Bowman's capsule is called as glomerulus Option (1) is correct.
(2)The hormone secreted by -gland controls metabolism of calcium and phosphorus.
(1) pituitary
(2) thyroid
(3) parathyroid
(4) adrenal
Explanation: The hormone parathormone secreted by parathyroid gland controls metabolism of calcium and phosphorus. Option 3 is correct.the
(3)Find the odd member out:
(1) Nephron
(2) Ureter
(3) Neuron
(4) Urethra
Explanation: Neuron is a cell in the nervous system. Others are the parts of the excretory system.
Option is correct.
(4)There are pairs of cranial nerves.
(1)31
(2) 12
(3) 23
(4)7
Explanation: There are 12 pairs of cranial nerves.
Option 2 is correct.
**QUESTIONS FOR PRACTICE
(1) The long tubular cavity of the spinal cord is called
(1) ventricle
(2) convolution
(3) CSF
(4) central canal
Ana-(4) central canal
(2)along with the nervous system are responsible for the control and coordination In our body.
(1) Salivary glands
(2) Mammary glands
(3) Endocrine glands
(4) mucous glands movement.
Ana-(3) Endocrine glands
(3) The shoot system of plants shows
(1) gravitropic
(2) phototropic
(3) hydrotropic
(4) chemotropic
Ana-(2) phototropic
(4)Proper coordination between various systems of an organism helps to maintain a state of equilibrium called
(1) homeostasis
(2) transportation
(3) photosynthesis
(4) transpiration
The
Ana-(1) homeostasis
(5)The basic filtration unit in human kidney is (1) Bowman's capsule
(2) nephron
(3) neuron
(4) glomerulus
Ana-(2) nephron
(6)controls the opening and closing of stomata.
(1) Guard cells
(2) Transpiration pull
(3) Root pressure
(4) Osmosis
Ana-(1) Guard cells
7) Find the odd man out:
(1) Auxin
(2) Abscisic acid
(3) Thyroxine
(4)Gibberellin
Ana-(3) Thyroxine
(8) There are about human kidney. nephrons in each
1)10
(2) 10
(3) 10
(4) 10
Ana- (3) 10
(9) Which of the following organs is not related to excretion?
1) Skin
(2) Lungs
(3) Kidney
(4) Heart
Ana- (4) Heart
(10) perform the function of Integration in nervous system.
(1) Association neurons
(2) Sensory neurons
(3) Motor neurons
(4) Spinal cord
Ana-(1) Association neurons
(11) The cells that support the nerve cells and help in their functioning are called
(1) dendrites ART neuroglia
(3) axon
(4) cell body
Ana-(2) neuroglia
(12) The function of hormone abscisic acid is (1) enlargement of cells
(2) stem elongation
(3) call division
(4)-retardation of growth
Ana-(4) retardation of growth
(13) Beta cells of pancreas secrete hormone- (1) glucagon
(2) insulin
(3) somatostatin
(4) pancreatic polypeptide
Ana-(2) insulin
(14) Which of the following function is performed by the right half of the human brain?
(1) Speech
(2) Conversation
(3) artistic abilities
(4) logical thinking
Ana-(3) artistic abilities
(15) -is the largest part of the human brain.
(1) Cerebrum
(2) Cerebellum
(3) Medulla oblongata
(4) CSF
Ana-(1) Cerebrum
(16) - a part of the brain controls the involuntary activities in our body.
(1) Cerebrum
(2) Cerebellum
(3) Medulla oblongata
(4) Spinal cord
Ana-(3) Medulla oblongata
(17) Thyroxine is secreted by___gland,
(1) pituitary
(2) thyroid
(3) pancreas
(4) ovary
Ana- (2) thyroid
(18) Hypothalamus glands are located
(1) near trachea
(2) in the neck
(3) on the kidney
(4) in the forebrain
Ana-(4) in the forebrain
(19) Tendrils of climbers are sensitive to
(1) touch
(2) light
(3) gravity
(4) water
Ana- (1) touch
(20) There are -pairs of spinal nerves.
(1) 12
(2)31
(3) 23
(4) 11
Ana-(2) 31
Hints for difficult questions)
(7) Thyroxine is a hormone in human beings, others are plant hormones. .
.Option 3 is correct.
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