Bissoy.com
Doctors Medicines MCQs Q&A

Consider the following statements regarding Muscle Tissue: 1. Each muscle is made of numerous fine fibrils, called myofibrils. 2. Smooth muscles are voluntary as their functioning can be directly controlled. 3. Cardiac muscle tissue is a contractile tissue present only in the heart. Which of the statements given above is/are correct?

Consider the following statements regarding Muscle Tissue: 1. Each muscle is made of numerous fine fibrils, called myofibrils. 2. Smooth muscles are voluntary as their functioning can be directly controlled. 3. Cardiac muscle tissue is a contractile tissue present only in the heart. Which of the statements given above is/are correct? Correct Answer 1 and 3 only

  • Each muscle is made of many long, cylindrical fibres arranged in parallel arrays.
  • These fibres are composed of numerous fine fibrils, called myofibrils. Hence statement 1 is correct
  • Muscle fibres contract (shorten) in response to stimulation, then relax (lengthen) and return to their uncontracted state in a coordinated fashion.
  • Smooth muscles are ‘involuntary’ as their functioning cannot be directly controlled. Hence statement 2 is not correct
  • We usually are not able to make it contract merely by thinking about it as we can do with skeletal muscles.
  • Cardiac muscle tissue is a contractile tissue present only in the heart. Hence statement 3 is correct.

Related Questions

In comparing the operation of the half-controlled 2-pulse circuit with that of the fully-controlled circuit, which of the following statements are evident? 1. Since half the thyristors are replaced by diodes, a half-controlled converter costs less than a fully-controlled converter. 2. Due to the freewheeling action with a half-controlled bridge-circuit power factor is improved in half-controlled converters. 3. The AC supply current is more distorted due to its zero periods with the half-controlled circuit, compared to a fully-controlled bridge circuit. Select the correct answer using the code given below :
Consider the following statements regarding muscle tissue: 1. Skeletal muscle tissue is closely attached to skeletal bones. 2. The smooth muscle fibres taper at both ends (fusiform) and do not show striations Which of the statements given above is/are correct?
Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the right order to form a meaningful and coherent paragraph. A: The primary purpose of a pacemaker is to maintain an adequate heart rate, either because the heart's natural pacemaker is not fast enough, or because there is a block in the heart's electrical conduction system. B: These allow a cardiologist to select the optimum pacing modes for individual patients.  C: Modern pacemakers are externally programmable. D: A cardiac pacemaker is a medical device that generates electrical impulses to cause the heart muscle chambers contract and therefore pump blood.
Three statements are given, followed by two conclusions numbered 1, 2 and 3. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: Each tissue is a bone. All ligaments are bones. All bones are muscles. Conclusions: 1. Some muscles are ligaments. 2. All tissues are muscles. 3. No bone is a ligament.
One major difference between the action potential of cardiac muscle fibers and the action potential of skeletal muscle fibers is that in cardiac muscle fibers
S1:The heart is pump of life.
P :They have even succeeded in heart transplants.
Q :Nowadays surgeons are able to stop a patients heart and carry out complicated operations.
R :A few years ago it was impossible to operate on a patient whose heart was not working properly.
S :If heart stops we die in about five minutes.
S6:All this was made possible by the invention of heart-lung machine.

The Proper sequence should be:
Accommodation is a process in the eye where
1. Ciliary muscles attached to the lens
flatten it for distant objects
2. Ciliary muscles attached to the lens thicken for closer objects
3. Ciliary muscles flatten the lens for closer objects
4. Ciliary muscles thicken the lens for distant objects
Select the correct answer from the options given below:
Match the structures given in Column I with the tissue given in Column II in which they are present. Select the correct answer using the codes given below : Column I Column II 1. Chondrocyte (a) Nervous tissue 2. Fat cells (b) Voluntary muscle fibre 3. Myofibril (c) Cartilage 4. Axon (d) Bone 5. Periosteum (e) Adipose tissue
Given below are quantities named A,B and C. Based on the given information, you have to determine the relation between the quantities. You should use the given data and your knowledge of mathematics to choose among the possible answer. Akash’s present age is six years less than Badshah’s age after nine years. The ratio of present age of Badshahand RAFTAAR is 5:9. Raftaar is 21 years younger than Denny and Denny is three years older than Honey. Square of the Honey’s present age is 1350 more than 15 times of Honey’s present age? Quantity A: What is the difference between AKASH’s present age and HONEY’s age after 16 years? Quantity B: After 6 years Mankirat’s age is twice that of Akash’s present age. Diljeet’s present age is 3.5 times of 25% of sum of present age of Mankirat and A. What is the present age of Diljeet? Quantity C: Twice of A’s present age is eight years more than that of Babbu’spresent age, then find the Babbu’s present age?
The question below consists of a set of labelled sentences. Out of the four options given, select the most logical order of the sentences to form a coherent paragraph. P: A surprising fact about heart attacks is they appear to have seasonal and temporal patterns.  Q: A heart is a muscle, and it needs a good blood supply to keep it healthy.  R: A heart attack happens when there is a sudden complete blockage of an artery that supplies blood to an area of your heart. S: As per different statistics and research, a higher percentage of heart attacks occur in the cold weather.