MCQ
The given figure shows open circulatory system of cockroach. Identify the structure that facilitate the flow of haemolymph by its contraction and relaxation
- A$A$
- ✓$B$
- C$C$
- DAll of these
✓
Answer
Correct option: B.
$B$
b
Alary muscles (structure marked as $B$ ) are located in pairs in the chambers of cockroach heart. They are $13$ pairs of wing shaped involuntary muscles which expand and contract to facilitate the flow of haemolymph through the heart.
Alary muscles (structure marked as $B$ ) are located in pairs in the chambers of cockroach heart. They are $13$ pairs of wing shaped involuntary muscles which expand and contract to facilitate the flow of haemolymph through the heart.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following statements are correct regarding skeletal muscle?
→$A$. Muscle bundles are held together by collagenous connective tissue layer called fascicle.
$B$. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.
$C$. Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins.
$D$. $M$ line is considered as functional unit of contraction called sarcomere.
Choose the most appropriate answer from the options given below:
Delete odd one :
Select the incorrect sentence.
Which one of the following is the correct description of a certain part of a normal human skeleton?
Choose correct option.
→$(i)$ The heterozygous female transmit the disease to son.
$(ii)$ Change in the shape of the $RBC$ from biconcave disc to elongated sickle like structure.
$(iii)$ Mentally retarded.
$(iv)$ Heamoglobin not formed proper amount in blood.
$I.$ Ureter $II.$ Renal pelvis, $III.$ Calyx $IV.$ Urinary bladder $V.$ Urethra Choose the correct sequence of urine route to outside
→Which fungal extract was extensively used in treating wounded American soldiers in world war-$II$?
→$A$ : During evolution pouched mammals of Australia survived.
$R$ : Due to lack of competition from any other mammal due to continental drift
→$R$ : Due to lack of competition from any other mammal due to continental drift
The ground substance of connective tissue is basically composed of
Which one of the following animals has two separate circulatory pathways?