Biology · General Awareness

Muscle Biology

836 Questions

Muscle biology covers the structures, functions, and contraction mechanisms of skeletal, cardiac, and smooth muscles. Test questions target filaments, stimuli, and specific muscle roles. A clear understanding helps secure marks in biology sections.

Skeletal muscle controlCardiac muscle propertiesMuscle contraction mechanismActin and myosin filamentsMuscle functions

Muscle Biology Questions

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Movements in body are brought about by ____________

  1. Muscular tissue

  2. Epithelial tissues

  3. Bones

  4. Tendons and ligaments
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Epithelial tissues are meant for covering and protecting the body, organs and cavities. They are not involved in body movements.
Bones form the framework of the body. They are hard and rigid. To carry out body movement property of contraction and relaxation is necessary. But bones can not contract.
Tendon is a tough fibrous connective tissue, which connects muscle to bone. Tendon does not have the property of contraction and relaxation. The ligament is a fibrous connective tissue, which connects bone to another bone. It is flexible but is not present throughout the body to carry out body movement.
Muscular tissues possess the property of contraction and relaxation. They are attached to bones. With the help of bones, muscular tissue carries out body movement. Therefore, option A is correct. 

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Contraction and relaxation are unique features of_______________

  1. Epithelial tissue

  2. Connective tissue

  3. Muscle tissue

  4. Nervous tissue
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Epithelial tissue is meant for covering and protecting the body, organs and cavities. They do not possess the property of contraction and relaxation. 
Connective tissue connects, supports and separates the organs in the body. These are present in different forms as fluid, jelly-like rigid, hard forms. 
Nervous tissue is meant for rapid transmission of the signals from one place to another. These tissues do not contract or relax.

Muscle cells are elongated and possess contractile proteins as actin, myosin. These proteins carry out contraction and relaxation of muscles and cause the body movement. Therefore, option C is correct. 

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Which of the following tissue provide movement and locomotion to the body?

  1. Connective tissue

  2. Locomotory tissue

  3. Muscular tissue

  4. Adipose tissue
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Muscle tissue helps in locomotion and provides a structural framework to  the body. These have contractile proteins for contraction and relaxation. It controls voluntary and involuntary actions. It is separated into three distinct categories, smooth muscle, skeletal muscle and cardiac muscle. So, the correct answer is option C.

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

.......... gives rise to the ability of muscles to contract.

  1. Nervous tissue

  2. Muscle tissue

  3. Connective tissue

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Muscular tissue provides a structural framework to the body along with connective tissue. It has immense potential to contract as they have major contractile proteins like actin and myosin. The muscle contraction requires ATP which hydrolyses to ADP and inorganic phosphate to allow the overlap of the contractile proteins during muscle contraction. The calcium ions released by the sarcoplasmic reticulum acts as a cofactor to activate the contractile proteins.

So, the correct answer is option B.

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Which of the following proteins has an impact on the regulation of internal movements?

  1. Actin

  2. Myosin

  3. Tropomyosin

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Actin is the thin filament which is present in the muscles. Myosin is the thicker filaments in the muscles. The tropomyosin is the regulatory protein which is present in the grooves of the actin filament. This is the regulatory protein which helps in the contraction and relaxation of the myosin bridge. These proteins are the structural units of the muscle fibres and help in the contraction and relaxation of muscles to allow internal movement of the involuntary muscles. 

Thus, the correct answer is option D. 

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Which of the following muscles control the internal movements?

  1. Cardiac muscle

  2. Smooth muscle

  3. Skeletal muscle

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The internal movements are performed by the involuntary muscles. The involuntary muscles function on their own and cannot be controlled willingly. The cardiac muscles are the involuntary muscles which are responsible for the pumping of the heart. The heart pumps and supplies the oxygenated blood to the different tissues in the body. The smooth muscles are responsible for carrying out peristalsis in the tube like structures of the alimentary canal. This movement helps in propelling the food in the forward direction. Both these muscles are of the involuntary type. 

Thus, the correct answer is option D. 

Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Myology belongs to the study of

  1. Shells

  2. Mammals

  3. Muscles

  4. Skin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Conchology is the study of shells.
Mammalogy is the study of mammals. 
Myology is the study of structure, function and arrangement of muscles.
Dermatology is the study of skin.
So correct answer is 'Muscles'.
Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Muscles immune to fatigue are

  1. Striped

  2. Unstriped

  3. Cardiac

  4. Eye muscles
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Cardiac muscle has a large amount of mitochondria than skeletal muscle. It has a continuous supply of oxygen and nutrients that help to resist fatigue.
So, the correct answer is 'Cardiac'.
Multiple choice biology animal tissue muscular tissues muscle tissue muscle tissues

Choose the correct answers from the alternatives given.
Which of the following muscles bend the forearm upwards?

  1. Biceps

  2. Triceps

  3. Gastrocnemius

  4. Gluteus maximus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The large muscle of the upper arm flexes the arm and powerfully twists the forearm, turning the palm upward.
  • This muscle extends from the head of the head of the humerus over the elbow to the ulna bone to help flex the elbow, and also enables pronation of the forearm.
So, the correct option is 'Biceps'.

Multiple choice physics world of sounds sound produced by humans propagation of sound production and propagation of sound

Muscles attached to the vocal cords can make them

  1. tight only

  2. loose only

  3. both loose and tight as per requirement

  4. neither loose nor tight
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The muscles attached to the vocal cords can expand and contract, thus making them tight and loose. The voice quality changes depending on whether the vocal cords are tight or loose.

Multiple choice bio-chemistry transportation in plants and circulation in animals role of blood in transport function of blood blood and lymph

Select the correct option:

Read the following statements and select the correct option:
(i) Blood cells secrete fibres of structural proteins called collagen and elastin.
(ii) Neuroglial cells protect and support the nephrons.
(iii) Osteocytes are present in spaces called lacunae.
(iv) Straited muscle fibres are bundled together in a parallel fashion.
(v) Biceps are involuntary and striated

  1. Statements (iii) and (iv) are incorrect

  2. Statement (ii) and (iv) are incorrect

  3. Statement (i) and (iii) are incorrect

  4. Statement (i), (ii) and (v) are incorrect
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The structural proteins collagen and elastin are present in white collagen fibres and yellow elastic fibres respectively, which are connective tissue fibres. Neuroglial cells are specialised cells found in the brain and spinal cord supporting the neurons and their firbres. The muscles of biceps are voluntary and striated.

Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

The smallest muscle in the human body is

  1. Sartorius

  2. Stapedius

  3. Stapes

  4. Mandibular
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stapedius is a muscle on the wall of the tympanic cavity of the middle ear. It is the smallest skeletal muscle in the human body. It acts reflexively in response to loud sounds by reducing excessive vibrations that may injure the internal ear. Thus the correct answer is option B.

Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

How do muscles attached to the bones move the body?

  1. Automatically

  2. Pull movement only

  3. Push movement only

  4. Push and pull movement
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The Muscles work by contraction and relaxation this represents that muscles can pull bones, but they can't push them back to the original position.
  • For this reason, muscles are often arranged in pairs that pull bones in opposite directions.
  • Hence muscles attached to the bones move the body by pull movement only.
  • So, the correct answer is 'Pull movement only'.
Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

Muscular and nervous excitability is lowered by which of the following?

  1. Na

  2. Mg

  3. Ca

  4. K
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • High extracellular K+  leads to depolarization and ensuing inactivation of voltage-gated Na+ channels and loss of excitability in isolated muscles, exercise-induced loss of K+ is likely to reduce muscle excitability and thereby contribute to muscle fatigue. Hence, Muscular and nervous excitability is lowered by K.
So, the correct answer is 'K'.


Multiple choice biology locomotion and movements introduction to locomotion skeleton and joints movement in animals

Which of the following is true of muscle contraction?

  1. H-zone expands

  2. I-band expands

  3. A-Band remains constant

  4. The sarcomeres expands
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  •  Upon muscle contraction, the A-bands do not change their length, whereas the I-bands and the H-zone shorten.
  •  This causes the Z lines to come closer together. The protein [tropomyosin] covers the myosin binding sites of the actin molecules in the muscle cell. Hence, A-Band remains constant  is true of muscle contraction
    •  So, the correct answer is 'A-Band remains constant'.