Chapter 7: Structural Organisation in Animals

Question 1

In unicellular organisms, all functions like Digestion, respiration and reproduction and performed by a ___________

Answer 1

Single Cell

Question 2

A group of similar cells alongwith intercellular substances perform Specific function, Such an Organisation is called _________

Answer 2

Tissue

Question 3

All complex animals consist of only _______ types of tissue

Answer 3

Four (4)

Epithelial
Connective
muscular
neural

Question 4

Tissue are organised in a specific proportion and pattern to form an _________

Answer 4

Organ

Question 5

When two or more organs perform a common function by their physical and/or chemical interaction, They together form __________

Answer 5

Organ System
e.g - Digestive system, respiratory system etc

Question 6

Our heart consists of all the ________ types of tissues

Answer 6

Four

Epithelial
Connective
muscular
neural

Question 7

__________ refers to study of form or externally visible feature

Answer 7

Morphology

In plant or microbes, the term morphology precisely means only this, in case of animal this refers to the external appearance of the Organ or parts of the body

Question 8

The word Anatomy conventionally is used for the study of __________ of internal organs in the animals

Answer 8

morphology

Question 9

Frogs can live both on land and in freshwater and belong to Class ________ of phylum ________

Answer 9

Amphibia

Chordata

Question 10

The most common species of frog found in india is _________

Answer 10

Rana tigrina
(Indian BullFrog)

Question 11

Frogs do not have constant body temperature i.e. their body temperature varies with the temperature of the environment, Such animals are called Cold blooded or ___________

Answer 11

Poikilotherms

Question 12

Frogs have the ability to change the colour to hide them from their enemies is called _____________

this protective coloration is called ________

Answer 12

Camouflage

Mimicry

Question 13

During peak summer and winter frogs take shelter in deep burrows to protect them from extreme heat and cold. This is known as Summer sleep or ____________ and winter sleep___________

Answer 13

Aestivation

Hibernation

Question 14

The frog skin is smooth and slippery due to the presence of _________

Answer 14

Mucus

Question 15

The frog never drinks water but absorb it through the __________

Answer 15

Skin

Question 16

Body of a frog is divisible into _______ and _______ ,A neck and tail are absent

Answer 16

Head
Trunk

Question 17

Eyes of frog covered by a ____________ membrane that protects them while in water. on either side of eyes a membranous ___________(ear) receives sound signals

Answer 17

Nictitating

Tympanum

Question 18

The hind limbs have _____ digits and they are larger and muscular than fore limbs that end in _______ digits. Feet have webbed digits that help in swimming

Answer 18

Five

Four

Question 19

The differences in appearance between males and females of the same species is called __________

Answer 19

sexual dimorphism

Question 20

Male frogs can be distinguished by the presence of sound producing ______ and also a copulatory pad on the ______ digit of the fore limbs which are absent in Female frog

Answer 20

Vocal Sacs
First digit

Question 21

Frogs are _________ and hence the length of intestine is reduced

Answer 21

Carnivores

Question 22

The frog mouth opens into the _________ that leads to the Oesophagus through ______

Answer 22

Buccal cavity
Pharynx

Question 23

Liver secretes Bile that is stored in __________

Answer 23

Gall bladder

Question 24

___________, a digestive gland produces Pancreatic juice containing digestive enzymes

Answer 24

Pancreas

Question 25

In Frog **Food** is captured by _________ tongue

Answer 25

**Bilobed**

Question 26

Digestion of food takes place by the action of _____ and _______ secreted from the **walls of the stomach**. Partially digested food Called ________ is passed from stomach to the **first part of the small intestine**, the __________

Answer 26

**HCL** **Gastric Juices** **Chyme** **Duodenum**

Question 27

The **duodenum** receives **bile** from **gall bladder** and **Pancreatic juices** from the pancreas through a common __________

Answer 27

**Bile duct**

Question 28

**Bile** emulsifies **fat** and **pancreatic juices** digest ___________

Answer 28

**Carbohydrate and Proteins**

Question 29

Final digestion takes place in the intestine, Digested food is absorbed by the numerous **Finger-like** folds in the inner wall of intestine called______ and ___________

Answer 29

**Villi** **Microvilli**

Question 30

Frogs respire on land and in water by two different methods, in water , **skin** acts as aquatic respiratory organ , this mode of respiration is called ___________. On land the buccal cavity, skin and lungs act as the respiratory organs , the respiration by **lungs** is called ____________

Answer 30

**Cutaneous Respiration** **Pulmonary respiration**

Question 31

During **Aestivation** and **Hibernation** gaseous exchange takes place through __________

Answer 31

**Skin**

Question 32

The vascular system of frog is well-developed _________ type The blood vascular system involves Heart,blood vessels and __________

Answer 32

**Closed** **Blood**

Question 33

The lymphatic system consists of lymph , lymph channels and _________

Answer 33

**Lymph nodes**

Question 34

Frog has _____ Chambers heart, ______ **atria** and _____ **Ventricle** and heart is covered by a membrane called ___________

Answer 34

**Three** Chambers **2** atria **1** ventricle **Pericardium**

Question 35

A triangular structure called __________ joins the **Right Atrium**. It receive blood through the major **Veins** Called __________

Answer 35

**Sinus venosus** **Vena cava**

Question 36

The **Ventricle** opens into a sac like ___________on the **ventral** side of the heart

Answer 36

**Conus arteriosus**

Question 37

The blood **from the heart** is carried **to all parts of the body** by the _________

Answer 37

**Arteries** (Arterial system)

Question 38

The ________ collect blood from different parts of body to the heart and form the _________

Answer 38

**Veins** **Venous system**

Question 39

Special **Venous** connection between **liver and intestine** is called ____________ and connection between **Kidney** and **lower parts of the body** is called __________

Answer 39

**Hepatic portal system** **Renal portal system**

Question 40

The blood is composed of **plasma** and **Cells**. The blood cells are **RBC** (Red blood cells) or **Erythrocytes** **WBC** (White blood cells) or **Leucocytes** and _________

Answer 40

**Platelets**

Question 41

In frog **RBC's** are nucleated and contain red coloured pigment namely __________

Answer 41

**Haemoglobin**

Question 42

The elimination of nitrogenous wastes is carried out by a well developed _____________

Answer 42

**Excretory system**

Question 43

The excretory system consists of a pair of ________, ureters ,cloaca and urinary bladder

Answer 43

**Kidneys**

Question 44

Each **Kidney** is composed of several **structural and functional** units called ____________

Answer 44

**Uriniferous tubules** or **Nephrons**

Question 45

Two ureters emerge from the kidneys in the _________ frog, The ureters act as ______________ which opens into the cloaca

Answer 45

**Male** **Urinogenital duct**

Question 46

In female frogs the ureters and ________ open **separately** in the cloaca

Answer 46

**Oviduct**

Question 47

The frog excretes **Urea** and thus is a ___________ animal

Answer 47

**Ureotelic**

Question 48

In frog the nervous system is organised into a **Central nervous system** (Brain and spinal cord) **Peripheral nervous system**(Cranial and spinal nerves) **autonomic nervous system** (Sympathetic and parasympathetic) There are ______ pairs of cranial nerves arising from the brain .

Answer 48

**10** (Ten)

Question 49

Brain is enclosed in a bony structure called **Brain box** or ____________

Answer 49

**Cranium**

Question 50

The frog brain is divided into **Fore-brain** **mid-Brain** **hind-Brain** which parts of brain comes under these three

Answer 50

**Fore-brain** -Olfactory lobes, paired cerebral hemispheres and unpaired diencephalon. **mid-Brain**- A pair of optic lobes **hind-Brain** -Cerebellum and medulla oblongata

Question 51

The **Medulla oblongata** passes out through the _________ and continues into **spinal cord** which is enclosed in the **vertebral column**

Answer 51

**Foramen magnum**

Question 52

**External ear** is absent in frogs and only ____________ can be seen externally, The ear is an organ of **hearing** as well as __________

Answer 52

**tympanum** **Balancing** (equilibrium)

Question 53

Male reproductive organs consist of a pair of yellowish ovoid **Testes** which are found adhered to the upper part of kidneys by a double fold of **Peritoneum** called ___________

Answer 53

**Mesorchium**

Question 54

**Vasa efferentia** are ______ in number that arise from testes, They enter the kidneys on their side and open into _________ canal

Answer 54

**10-12** **Bidder's** canal

Question 55

In female frog the ovaries are situated near kidneys and there is no ______________ connection with kidneys

Answer 55

**functional**

Question 56

A mature female can lay __________ ova at a time.

Answer 56

2500 to 3000

Question 57

In frog, Fertilisation is ______________ and takes place in water

Answer 57

**External**

Question 58

In frog development involves a **larval** stage called _________,

Answer 58

**Tadpole**

Question 59

**Tadpole** undergoes _______________ to form adult

Answer 59

Metamorphosis The changes in the stages from a larva to an adult are known as -metamorphism