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Structural Organisation in Animals Test - 86

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Structural Organisation in Animals Test - 86
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  • Question 1
    1 / -0
    The correct representation of the given alphabets is

    Solution
    Tendon (A) attaches muscle to bone. Muscles (B) are responsible for the movement of the body parts by contraction.  Ligament (C) connect 2 bones and prevents excessive movement between bones. Ulna (D) is one of the bones of the forearm. Bone is a hard connective tissue. Thus, the correct answer is option E.
  • Question 2
    1 / -0
    Choose the correct sequence of heart structures that blood would pass through when traveling from the right atrium to the lungs and then to the left ventricle.

    Solution
    The human circulatory system is a double circulatory system. It has two separate circuits and blood passes through the heart twice.
    The vena cava carries the deoxygenated blood from the body to the right atrium.
    From the right atrium, blood enters the right ventricle (6) which in turn pumps the blood into the pulmonary arteries (2). 
    The pulmonary arteries carry deoxygenated blood to the lungs for oxygenation. 
    Two pulmonary veins (4) from each lung bring oxygen-rich blood to the left atrium (5) which then enters the left ventricle. 
    The left ventricle (7) pumps oxygenated blood into the aorta which in turn branches and delivers blood to the rest of the body and organs. 
    Therefore, the correct answer is option E.
  • Question 3
    1 / -0
    Which part of the alimentary canal in cockroach secretes peritrophic membrane around the food?
    Solution
    Oesophagus opens into crop which is a sac like structure. Crop is the largest part in alimentary canal. Gizzard is highly muscular and bulb like structure. The inner wall of gizzard produces 6 chitionus plates which bear the teeth. Below the chitinous plates soft pads and bristles are present. They form the sieve like structure which acts as a filtering apparatus. Gizzard acts as a grinding mill and filtering apparatus. A stomodeal valve is present at the junction of gizzard and mesenteron. Stomodeal valve prevents the backward movement of food materials from mesenteron to gizzard. The food bolus in the mesenteron is enveloped by a porous, mesh like membrane called peritrophic membrane which is secreted by the glandular cells of anterior part of the mesenteron. Peritrophic membrane protects the wall of mesenteron from hard food particles. 
  • Question 4
    1 / -0
    In the blood circulation of Pheretima, the blood collected by lateral oesophageal blood vessel flows into supra oesophageal blood vessels through
    Solution
    The hearts in the 12th and 13th segments are called lateral oesophageal hearts. There are also two pairs of non-pulsatile loops in segments 10 and 11, which connects the supra-oesophageal vessel to the lateral oesophageal vessels.
    The sub-neural vessel receives blood via the lateral-oesophageal vessels from the anterior region and supplies it to the dorsal vessel through the commissural vessels. The lateral oesophageal vessels also send blood through the anterior loops to the supra-oesophageal vessel, which then passes it through the lateral oesophageal hearts to the ventral vessels.
    ring vessels are the vessels present in the wall of the gut. They connect the lateral oesophageal vessels to the supra-oesophageal vessels. There are 12 vessels in each segment.
    Thus, the correct answer is option (A).
  • Question 5
    1 / -0
    Thermoreceptor sensillae of cockroach are located on
    Solution
    Thermoreceptor sensilla of cockroach arc located in the 1st, 2nd, 3rd segment of the tarsus of legs of cockroach.
  • Question 6
    1 / -0
    In voluntary muscle movement, which of the following process occurs only if ATP is present?
    Solution
    The contraction of voluntary muscles  requires a nervous impulse which is transferred from the neuron to the sarcolemma of the muscle cell. As impulse travels through the sarcoplasmic reticulum, the calcium is diffused into the myofilaments filling and exposing the actin binding sites. ATP is a critical factor that helps to prepare Myosin for binding as well as for recharging the myosin. The binding of ATP to a myosin head detaches myosin from actin. 
    Thus, the correct answer is option B.
  • Question 7
    1 / -0
    Identify the following structures which are presnt in dioptrical region of the ommatidium of cockroach.
    Solution
    Ommatidia is defined as the cluster of photoreceptor cell present in the compound eyes of arthropods like cockroach which are composed of units called ommatidia. 
    Vitrellae is the transparent lens like cells in the ocelli.
    Retinulea is the neural receptor of a single facet of an arthropod compound eye.
    Rhabdome is a translucent cylinder forming part of the light- sensitive receptor in the eye of an arthropod.
    Thus, the correct answer is option A.
  • Question 8
    1 / -0
    Number of alary muscles in cockroach are
    Solution
    There are 12 alary muscles present in the cockroach. These muscles are connected to both tergum and dorsal diaphragm. They help in the blood circulation in cockroach.
    So the correct answer the '12'.
  • Question 9
    1 / -0
    Conglobate gland is found in
    Solution
    Conglobate gland or phallic gland is found ventrally beneath to articular gland in the sixth abdominal segment of the male cockroach. It is sac like club shaped accessory gland, open out by a pore, situated vicinity to the genital pore.
  • Question 10
    1 / -0
    In Cockroach, glands present between 5th and 6th abdominal segments are
    Solution
    Stink gland in cockroach is present between 5th and 6th abdominal segments. This gland produce a fluid that helps to protect it from the predators.
    So the correct option is 'Stink'.
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