Gizzard (proventriculus) in cockroach lies between
oesophagus and stomach
crop and mesenteron
mesenteron and ileum
oesophagus and crop
Correct Answer :
B. crop and mesenteron
Gizzard has an outer layer of thick circular muscles and thick inner forming six highly chitinous plate called teeth. It helps in grinding the food particles.
Related Questions
Identify the figure with its correct function Fig :. Adipose connective tissue
Areolar connective tissue Serves as a support framework for epithelium.
Adipose tissue Store fats and act as heat insulators.
Dense regular tissue Provide flexibility.
Dense irregular tissue Provide strength and elasticity.
The kind of epithelium which forms the inner walls of blood vessels is
cuboidal epithelium
columnar epithelium
ciliated columnar epithelium
squamous epithelium
Which of the following vertebrate tissues would be an excellent source of collagen?
Liver
Nerve
Muscle
Tendon
Which statement regarding anal cerci and anal style in cockroach is correct?
Anal cerci are absent but anal styles are present in male.
Anal cerci are absent and anal styles are present in female.
Anal styles are absent and anal cerci are present in male.
Anal styles are absent and anal cerci are present in female.
Which of the following type of cell junction is not found in animal tissues ?
Adhering junction
Tight junction
Gap junction
Plasmodesmata
The figure given below shows the head region of cockroach. Identify A to F.
A- Compound eye, B-Ocellus, C-Maxilla, D-Mandible, E-Labrum, F-Labium
A- Ocellus, B-Compound eye, C-Mandible, D-Maxilla, E-Labrum, F-Labium
A- Ocellus, B-Compound eye, C-Mandible, D-Maxilla, E-Labium, F-Labrum
A- Ocellus, B-Compound eye, C-Maxilla, D-Mandible, E-Labrum, F-Labium
Which of the following statement is/are correct regarding digestive system of cockroach ?
- Mouth opens into a short tubular pharynx, leading to a narrow tubular passage called oesophagus.
- Gizzard helps in grinding the food particles.
- A ring of 6-8 blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut, which secrete digestive juice.
- At the junction of midgut and hindgut is present another ring of 100-150 yellow coloured thin filamentous malphigian tubules which help in removal of excretory products from haemolymph.
Only (i)
Both (ii) and (iii)
Both (i) and (iv)
All of these
Match the description given in column I with their examples given in column II and choose the correct option.
| Column I | Column II |
|---|---|
| (Description) | (Example) |
| 1. Aquatic respiratory | A. Skin organ |
| 2. Organ which acts | B. Ureter urogenital duct and opens into the cloaca |
| 3. A small median chamber | C. Cloaca that is used to pass faecal matter, urine and sperms to the exterior |
| 4. A triangular structure | D. Sinus venosus which joins the right atrium and receives blood through vena cava |
1 - A, 2 - B, 3 - C, 4 - D
1 - C, 2 - A, 3 - D, 4 - B
1 - B, 2 - A, 3 - C, 4 - D
1 - C, 2 - B, 3 - D, 4 - A
The ciliated columnar epithelial cells in humans occur in
Eustachian tube and stomach lining
bronchioles and fallopian tubes
bile duct and oesophagus
fallopian tubes and urethra
The supportive skeletal structures in the human external ears and in the nose tip are examples of
ligament
areolar tissue
bone
cartilage
A student was given a sample of tissue. He observes and concludes the following characters.
- The cells are composed of a single layer of tall and slender cells.
- Their nuclei are located at the base.
- Free surface may have microvilli.
- It is found in the lining of stomach and intestine
- They help in secretion and absorption.
Based on the above features identify the epithelium.
Cuboidal epithelium
Columnar Epithelium
Squamous epithelium
Glandular epithelium
The only type of cell seen in a tendon is
muscle fibres
reticular cells
collagenous cells
fibroblasts
Match the terms given in column-I with their feature given in column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| (Terms) | (Features) |
| A. Exocrine gland | I. They help to stop substances from leaking across a tissue |
| B. Endocrine gland | II. Hormones are secreted directly into the fluid bathing the gland |
| C. Tight junctions | III. They perform cementing to keep neighbouring cells together. |
| D. Adhering junctions | IV. Secretes mucus, saliva, earwax, oil, milk, digestive enzymes and other cell products |
A IV; B II; C I; D III
A II; B IV; C I; D III
A IV; B II; C III; D I
A IV; B I; C II; D III
What external changes are visible after the last moult of a cockroach nymph?
Development of anal cerci.
Development of both forewings and hind wings.
Development labium.
Mandibles become harder.
When cardiac muscle cells are damaged by a heart attack, they are usually replaced by
connective tissue cells
new smooth muscle cells
new cardiac muscle cells
epithelial cells
Match column-I with column-II and choose the correct option.
| Column-I | Column-II |
|---|---|
| A. Periplaneta | I. Hepatic caecae americana |
| B. A ring of 6-8 blind | II. Phylum arthropoda tubules |
| C. Vascular system | III. Spiracles |
| D. 10 pairs of small | IV. Malpighian tubules holes |
| E. Excretion | V. Open type |
A I; B II; C III; D IV; E V
A II; B I; C V; D III; E IV
A II; B I; C III; D V; E IV
A III; B IV; C II; D V; E I
Neuroglia are
excitable cells of neural tissue.
supporting and non-excitable cells of neural tissue.
two to three times in volume of neural tissue.
protective and excitable cells of neural tissue.
Epithelial tissue is distinguished from connective tissue, muscular, or nervous tissue by its
large extracellular matrix.
contractibility.
ability to carry action potentials.
basement membrane.
Read the following statements.
- It is a contractile tissue present only in the heart.
- Cell junctions fuse the plasma membranes of these cells and make them stick together.
- Communication juntions at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.
Which of the following type of tissue is being described by the above statements ?
Skeletal muscle
Cardiac muscle
Smooth muscle
Cartilage
The diagram given below represents the reproductive organ of male cockroach. Choose the correct labelling of the part of marked as A, B, C and D.
A 8th sternum, B - Anal cercus, C - 10th tergum, D - Anal style
A - 10th tergum, B - Anal cercus, C - Anal style, D - 8th sternum
A - Anal style, B - Anal cercus, C - 10th tergum, D- 8th sternum
A - Anal cercus, B - 8th sternum, C - 10th tergum, D - Anal style.
The following figure shows the extarnal features of cockroach with few structures labelled as A, B, C, D, & E. Identify A to E .
A- Mesothorax, B-Pronotum, C-Metathorax, D-Tegmina, E-Anal style
A- Pronotum, B-Metathorax, C-Mesothorax, D-Tegmina, E-Sterna
A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal cerci
A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal style
Which of the following statements is not correct regarding neural tissue ?
It exerts the greatest control over the bodys responsiveness to changing conditions.
Chondrocytes, the unit of neural system are excitable cells.
Neuroglial cells protect and support neurons.
When a neuron is suitably stimulated, an electrical disturbance is generated.
Intercalated discs are the communication junctions between the cells of
cardiac muscles
striped muscles
adipose tissue
nerve and striated muscles
What will happen if ligaments are cut or broken?
No movements at joints.
Bones will become fixed.
Bones will become unfixed.
Bone will move freely at joints.
Hair present in the skin are
epidermal in origin and made of dead cells.
epidermal in origin and made of living cells.
dermal in origin and made of living cells.
dermal in origin and made of dead cells.
Male cockroach can be identified from the female by the presence of
long antennae
wingless body
elongated abdomen
anal styles
The shape of a persons ear is due to mainly to
dense regular connective tissue
dense irregular connective tissue
elastic cartilage
fibrocartilage
The chondrocytes of connective tissue are
fibre secreting cells
bone forming cells
cartilage cells
bone eating cells
The frog never drinks water but absorbs it through one of its respiratory organ. Identify the organ.
Skin
Lung
Buccal cavity
None of the above.
Select the correct statement regarding Periplaneta americana
There are 16 very long malpighian tubules present at the junctions of midgut and hindgut.
Grinding of food is carried out only by the mouth parts.
Nervous system is located ventrally and consists of segmentally arranged ganglia joined by a pair of longitudinal connectives.
Females bear a pair of short thread like anal styles.