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Tissues Test - 49

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Tissues Test - 49
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  • Question 1
    1 / -0
    Difference between bone and cartilage is in having:
    Solution
    • The haversian canal is a series of tubes around narrow channels formed by lamellae. 
    • The haversian canals surround blood vessels and nerve cells throughout the bone and communicate with osteocytes in lacunae through canaliculi. 
    • They are present only in bones and not in cartilages. 
    • The matrix of bones are vascular and the matrix of cartilage is non-vascular. 
    Hence, the correct option is D.
  • Question 2
    1 / -0
    Collagen fibers are secreted by:
    Solution
    Collagen is the main structural protein of the various connective tissues in animals. These are secreted by fibroblast cells. It appears, in the form of elongated fibrils and is mostly found in fibrous tissues, such as tendons, ligaments, and skin. The fibroblast is the most common cell that creates collagen. So, the correct answer is option D.
  • Question 3
    1 / -0
    Functionally, cardiac muscles are similar to
    Solution
    Cardiac muscles are the heart muscles. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are also involuntary in nature as smooth muscles.
    Thus, the correct answer is option A.
  • Question 4
    1 / -0
    Unstriated muscle are also known as:
    Solution
    Non-striated muscles are called smooth muscles. Their activities are not under the voluntary control of the brain and are therefore known as involuntary muscles. They are called visceral muscles because they line the blood vessels, stomach, digestive tract and other internal organs.
    So, the correct answer is option D. 
  • Question 5
    1 / -0
    The main function of ligament is
    Solution
    Ligaments are made up of tough, fibrous tissue and are found around the joints of the body. The ligaments connect the bone to bone at the union of the joint. They are elastic in nature, ligaments allow for the controlled movement of joints. 
    So, the correct answer is option A.
  • Question 6
    1 / -0
    Haversian canal is situated in:
    Solution
    Haversian canals are a series of tubes that contain blood vessels and nerve fibres and are seen in compact bones. 
    The Haversian canal is absent in other types of connective tissue and nervous tissue.
    So, the correct answer is option B.
  • Question 7
    1 / -0
    Epimysium of muscles are made up of
    Solution
    Epimysium is the outermost white fibrous connective tissue that completely surrounds and encases skeletal muscle. It is composed of dense irregular connective tissue. The most important biological purposes of this layer are protection from strain and friction. The smoothness of the tissues promotes seamless gliding, and also protect joints and other high-impact areas from rips or tears and promotes smooth movement of the limbs and joints.
    Hence the correct option is A.
  • Question 8
    1 / -0
    Belly of a muscle is
    Solution
    Most of the skeletal muscles are attached to the bone on their ends by tendons. As the muscles contract, a force is exerted on the bones, which helps to support and move our body along with its appendages. Usually, one end of the muscle is fixed in its position, while the other end moves during contraction.
    The "origin" is the attachment site that doesn't move during contraction, while the "insertion" is the attachment site that does move when the muscle contracts. The insertion is usually distal, or further away, while the origin is proximal, or closer to the body, relative to the insertion. "Belly" of muscle is between origin and insertion.
  • Question 9
    1 / -0
    Strongest muscles are
    Solution
    Muscular strength usually refers to the "ability to exert a force on an external object". The strongest muscle in humans, based on its weight is the masseter muscle or the jaw muscle. It is the muscle that can generate the largest externally measurable force attributable to the action of a specific, single muscle. Its strength is the result of incredibly densely packed muscle fibers combined with being attached to a short-armed lever. With all muscles of the jaw working together it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.
    Hence the correct option is D.
  • Question 10
    1 / -0
    Which of the following is/are the features of cardiac muscles?
    Solution
    Cardiac muscles are the muscles of the heart. Many cardiac muscle cells assemble in a branching pattern to form a cardiac muscle. Based on appearance, cardiac muscles are striated. They are involuntary in nature. Since the blood supply to cardiac muscle cells is rich in oxygen, they do not get fatigued. Also, the number of mitochondria in cardiac muscle cells is more which provides ample energy for these muscles to work tirelessly. So, the correct answer is option D.
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