Tag: muscle contraction

Questions Related to muscle contraction

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

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

  1. produces lactic acid

  2. produces more carbon dioxide

  3. stops functioning

  4. degrades protein

Show answer
Correct Option: A
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'

Extensor muscles of back have

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

  1. An aerobic oxidation

  2. Fast rate of contraction

  3. Larger diameter muscle fibers

  4. Abundant in myoglobin

Show answer
Correct Option: A,D
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'

Smallest muscle in the human body

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

  1. Sartorius

  2. Spinal muscle

  3. Stapes

  4. Stapedius

Show answer
Correct Option: D
Explanation:

The stapedius muscle, which is innervated by the facial nerve (cranial nerve VII), is the smallest of all skeletal muscles.

Largest muscle of human body is

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

  1. Stapedium

  2. Quadriceps

  3. Gluteus maximus 

  4. Masseter

Show answer
Correct Option: C
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'.

Which of the following muscle types CNNOT be used valuntarily.

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

  1. Both striated and smooth

  2. Both cardiac and striated

  3. Both smooth and cardiac

  4. Cardiac,striated and smooth

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Correct Option: C

The two muscles which help in thermoregulaton of the scrotum moving it up or down depending on outside temperature are

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

  1. Gastrocnemius and Flexor longus

  2. Cremaster and Danos muscle

  3. Adductor longus and Abductor flexor

  4. Flexor longus-Cremaster

Show answer
Correct Option: A

Cytoplasm of a muscle cell is?

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

  1. Neuroplasm

  2. Sarcoplasm

  3. Axoplasm

  4. Sarcolemma

Show answer
Correct Option: B
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'.

Muscles contain a red coloured oxygen storing pigment called _______________.

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

  1. Haemoglobin

  2. Myoglobin

  3. Erythrocruorin

  4. Haemolymph

Show answer
Correct Option: B
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'.

Muscle contains a red coloured oxygen containing pigment called

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

  1. Rhodopsin

  2. Myoglobin

  3. Hemocyanin

  4. Both A and B

Show answer
Correct Option: B
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.'

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

  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. $a - iii, b - v, c - ii, d - i$

Show answer
Correct Option: B
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.