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Which mouth part of cockroach is comparable to our tongue?
Biology Exemplar
Biology Exemplar

Class 11

NCERT Exemplar

Publisher:
NCERT
Subject:
Biology
1

Chapter 1: The Living World

37 questions

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2

Chapter 2: Biological Classification

33 questions

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3

Chapter 3: Plant Kingdom

28 questions

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4

Chapter 4: Animal Kingdom

45 questions

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5

Chapter 5: Morphology of Flowering Plants

42 questions

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6

Chapter 6: Anatomy of Flowering Plants

52 questions

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7

Chapter 7: Structural Organization in Animals

48 questions

Q1
Name the different cell junctions found in tissues
Q2
Which mouth part of cockroach is comparable to our tongue?
Q3
Give two identifying features of an adult male frog.
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8

Chapter 8: Cell: The Unit of Life

39 questions

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9

Chapter 9: Biomolecules

31 questions

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10

Chapter 10: Cell Cycle and Cell Division

43 questions

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11

Chapter 11: Transport in Plants

66 questions

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12

Chapter 12: Mineral Nutrition

39 questions

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13

Chapter 13: Photosynthesis in Higher Plants

59 questions

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14

Chapter 14: Respiration in Plants

42 questions

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15

Chapter 15: Plant Growth and Development

48 questions

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16

Chapter 16: Digestion and Absorption

34 questions

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17

Chapter 17: Breathing and Exchange of Gases

32 questions

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18

Chapter 18: Body Fluids and Circulation

42 questions

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19

Chapter 19: Excretory Products and their Elimination

44 questions

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20

Chapter 20: Locomotion and Movement

39 questions

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21

Chapter 21: Neural Control and Coordination

31 questions

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22

Chapter 22: Chemical Coordination and Integration

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Which mouth part of cockroach is comparable to our tongue?

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Biology Exemplar (NCERT Exemplar)

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Hypopharynx acts as a tongue in cockroach and lies within cavity enclosed by the mouth parts.
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Q1
Name the different cell junctions found in tissues
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Which mouth part of cockroach is comparable to our tongue?
Q3
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Practice questions from Biology Exemplar (NCERT Exemplar)

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Practice more questions from Structural Organization in Animals

Question 1
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Which of the following statements is correct about the cardiac muscles?

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(4) Gap junctions allow the cardiac cells to contract as a unit.
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Question 2
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Histamine, serotonin and heparin are secreted by
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Question 3
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Assertion (A) Cell junctions are present in the epithelium and other tissues.
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Question 4
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logy: Sensory Reception and Processing (B) Mechanism of vision :- There are two types of photoreceptor cells, namely, rods and cones. These cells contain the light-sensitive proteins called the photopigments. The daylight (photopic) vision and colour vision are functions of cones and the twilight (scotopic) vision is the function of the rods. The rods contain a purplish-red protein called the rhodopsin or visual purple, which contains a derivative of Vitamin A. In the human eye, there are three types of cones which possess their own characteristic photopigments that respond to red, green and blue lights. The sensations of different colours are produced by various combinations of these cones and their photopigments. When these cones are stimulated equally, a sensation of white light is produced. The light rays in visible wavelength focussed on the retina through the cornea and lens generate potentials (impulses) in rods and cones. As mentioned earlier, the photosensitive compounds (photopigments) in the human eyes is composed of opsin (a protein) and retinal (an aldehyde of vitamin A). Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin. This causes membrane permeability changes. As a result, potential differences are generated in the photoreceptor cells. This produces a signal that generates action potentials in the ganglion cells through the bipolar cells. These action potentials (impulses) are transmitted by the optic nerves to the visual cortex area of the brain, where the neural impulses are analysed and the image formed on the retina is recognised based on earlier memory and experience. For resynthesis of rohodopsin, animal blinks its eyelids. Retinal is formed by vitamin A so deficiency of vit A causes night blindness. Cones able us to differentiat among colours and bright light. Cones have a pigment called lodopsin in place of rhodopsin of rods. It is decomposed into photopsin and retinal. There are three types of cones in retina:- (a) Erythrolab - Red cones (b) Chlorolab - Green cones (c) Cynolab - Blue cones. We are able to acknowledge different colours due to these three types of cones and their combination. Red, green and blue are the primary colours.
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Question 4
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putinonary arted and the aorta respectively are provided with the semithar vales. The values in the heart allows the flow of blood only in got ditction. 1.e. Irom the atria to the ventricles and from the ventricles to the putinonay artery or aorta. These valves prevent any backward MN The cntire heart is made of cardiac muscles. The walls of ventricles are much thicker than that of the atria. A spectalised carcliac musculature the lowerkft cocucrof the right atrium close to the atrio ventricular septum cather the atrio-ventricular node (AVN). A bundle of nodal fibres. Atrie through the atrio-ventrientar septa to entres ave which passes ventricular septum and tmederepta to emerge on the top of the inter musculature of the respective sides and are ealled purkente flbres. The nodal musculature has the ability to generate action potentials without any external stimuli, i.e., it is autoexcitable. However, the number of action potentials that could be generated in a minute vary at different parts of the nodal system. The SAN can generate the maximum number of aetton potentials, i.e.. , and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. Therefore, it is caticd the pacemaker. Our heart normally beats times in a minute (average 72 beats min-1). 18.3.2 Cardiac Cycle How does the heart function? Let us take a look. To begin with, all the four chambers of heart are in a relaxed state, i.e., they are in joint diastole. As the tricuspid and bicuspid valves are open. blood from the pulmonary veins and vena cava flows into the left and the right ventricle respectively through the left and right atria. The semilunar valves are closed at this stage. The SAN now generates an action potential which stimulates both the atria to undergo a simultaneous contraction - the atrial systole. This increases the flow of blood into the ventricles by about 30 per cent. The action potential is conducted to the ventricular side by the AVN and AV bundle from where the bundle of His transmits it through the entire ventricular musculature. This causes the ventricular muscles to contract. (ventricular systole), the atria undergoes relaxation (diastole), coinciding with the ventricular systole. Ventricular systole increases the ventricular pressure causing the closure of tricuspid and
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Question Text
Which mouth part of cockroach is comparable to our tongue?
TopicStructural Organization in Animals
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes147