Tag: muscle contraction

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Questions Related to muscle contraction

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Choose the correct answers from the alternatives given.
When out of oxygen, vertebrate muscle:

  1. produces lactic acid

  2. produces more carbon dioxide

  3. stops functioning

  4. degrades protein
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The repeated contraction of the muscle results in the low concentration of oxygen and this anaerobic condition leads to the accumulation of lactic acid in the muscle. 
So, the correct option is 'produces lactic acid'
Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Extensor muscles of back have

  1. An aerobic oxidation

  2. Fast rate of contraction

  3. Larger diameter muscle fibers

  4. Abundant in myoglobin
Reveal answer Fill a bubble to check yourself
A,D Correct answer
Explanation

Extensor muscles. Attached to the back of the spine, these muscles allow us to stand and lift objects. They include the large muscles in the lower back (erector spinae), which help hold up the spine, and gluteal muscles.

Extensor muscles are one of the examples for red muscles which contains abundant mitochondria and myoglobin. 
Red muscle fibres contract and fatigue more slowly than white fibres and generate ATP by aerobic catabolism of glucose and fats, utilizing myoglobin-bound O2
Myoglobin is abundant and great numbers of mitochondria occur, characterized by slow, sustained (tonic) contraction.
So, the correct answer is 'An aerobic oxidation and Abundant in myoglobin'

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Largest muscle of human body is

  1. Stapedium

  2. Quadriceps

  3. Gluteus maximus

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

The gluteus maximus is the largest muscle in the human body. These muscles help move the hips and thighs and also keep the trunk of the body in upright position. These muscles work against the gravity when we are walking up stairs. So, the correct answer is 'Gluteus maximus'.

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Which of the following muscle types CNNOT be used valuntarily.

  1. Both striated and smooth

  2. Both cardiac and striated

  3. Both smooth and cardiac

  4. Cardiac,striated and smooth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Smooth muscles (found in organs) and cardiac muscles (found in the heart) are involuntary. Striated (skeletal) muscles are voluntary.

Multiple choice biology movement in animals types of muscles muscles muscles and their structure muscle contraction

Cytoplasm of a muscle cell is?

  1. Neuroplasm

  2. Sarcoplasm

  3. Axoplasm

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

  • Sarcoplasm is the cytoplasm of a myocyte (muscle fibre, muscle cell).
  •  It is comparable to the cytoplasm of other cells, but it contains unusually large amounts of glycosomes (granules of stored glycogen) and significant amounts of myoglobin, an oxygen-binding protein. Hence, the Cytoplasm of a muscle cell is sarcoplasm.
So, the correct answer is 'sarcoplasm'.

Multiple choice biology movement in animals types of muscles muscles muscles and their structure muscle contraction

Muscles contain a red coloured oxygen storing pigment called _______________.

  1. Haemoglobin

  2. Myoglobin

  3. Erythrocruorin

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

  • Myoglobin is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. 
  • It is distantly related to haemoglobin which is the iron- and oxygen-binding protein in blood, specifically in the red blood cells. Hence, Muscles contain a red coloured oxygen-storing pigment called myoglobin.
So, the correct answer is 'myoglobin'.

Multiple choice biology movement in animals types of muscles muscles muscles and their structure muscle contraction

Muscle contains a red coloured oxygen containing pigment called

  1. Rhodopsin

  2. Myoglobin

  3. Hemocyanin

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

  • Muscle contains a red coloured oxygen-containing pigment called myoglobin. It is similar to hemoglobin pigment that stores oxygen in the blood cells. Myoglobin binds oxygen with its heme group.

Thus, the correct answer is 'Myoglobin.'

Multiple choice biology movement in animals types of muscles muscles muscles and their structure muscle contraction

Match the following and find correct combination.

$(a)$ Abrin $(i)$ Lectin
$(b)$ GLUT-4 $(ii)$ Intercellular growth substance
$(c)$ Collagen $(iii)$ Hormone
$(d)$ Concanavalin $(iv)$ Enables glucose transport into cells
$(v)$ Toxin
  1. $a - iii, b - iv, c - ii, d - i$
  2. $a - v, b - iv, c - ii, d - i$
  3. $a - iii, b - iv, c - ii, d - v$
  4. $a - iii, b - v, c - ii, d - i$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Abrin is a highly toxalbumin found in the seeds of rosary pea.
Concanavalin A is a lectin extracted from jack bean,  and used to purify glycosylated molecules in lectin. 
Collagenis a intracellular growth substance. 
GLUT 4 is the insulin regulated glucose transporter found in the adipose tissues. 
So the correct answer is B.