2 Portion of myofibril present in between two Z-lines
3 Complete bundle of muscles
4 Both 1 and 2
Explanation:
The portion of the myofibril between two successive ' Z ' lines is considered as the functional unit of contraction and is called a sarcomere
BIOXI20: LOCOMOTION AND MOVEMENT
340075
Statement A : The myosin rich zone called A-band maintains its length during sarcomere contraction. Statement B : The length of I-band remains the same during muscle contraction
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, the I band is reduced in size as the overlap between the thick and thin filaments increases.
BIOXI20: LOCOMOTION AND MOVEMENT
340076
Sarcoplasmic reticulum is a storehouse of which ion
1 \(\mathrm{Ca}^{2+}\)
2 \(\mathrm{Na}^{+}\)
3 \(\mathrm{K}^{+}\)
4 \(\mathrm{Fe}^{2+}\)
Explanation:
The endoplasmic reticulum, i.e., sarcoplasmic reticulum of the muscle fibres is the store house of calcium ions.
BIOXI20: LOCOMOTION AND MOVEMENT
340077
The 'A' and 'I' bands are arranged ____throughout the length of the myofibrils.
1 Helically
2 Non alternately
3 Two of myosin and one of actin
4 Alternately
Explanation:
The 'A' and 'I' bands are arranged alternately throughout the length of the myofibrils.
2 Portion of myofibril present in between two Z-lines
3 Complete bundle of muscles
4 Both 1 and 2
Explanation:
The portion of the myofibril between two successive ' Z ' lines is considered as the functional unit of contraction and is called a sarcomere
BIOXI20: LOCOMOTION AND MOVEMENT
340075
Statement A : The myosin rich zone called A-band maintains its length during sarcomere contraction. Statement B : The length of I-band remains the same during muscle contraction
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, the I band is reduced in size as the overlap between the thick and thin filaments increases.
BIOXI20: LOCOMOTION AND MOVEMENT
340076
Sarcoplasmic reticulum is a storehouse of which ion
1 \(\mathrm{Ca}^{2+}\)
2 \(\mathrm{Na}^{+}\)
3 \(\mathrm{K}^{+}\)
4 \(\mathrm{Fe}^{2+}\)
Explanation:
The endoplasmic reticulum, i.e., sarcoplasmic reticulum of the muscle fibres is the store house of calcium ions.
BIOXI20: LOCOMOTION AND MOVEMENT
340077
The 'A' and 'I' bands are arranged ____throughout the length of the myofibrils.
1 Helically
2 Non alternately
3 Two of myosin and one of actin
4 Alternately
Explanation:
The 'A' and 'I' bands are arranged alternately throughout the length of the myofibrils.
2 Portion of myofibril present in between two Z-lines
3 Complete bundle of muscles
4 Both 1 and 2
Explanation:
The portion of the myofibril between two successive ' Z ' lines is considered as the functional unit of contraction and is called a sarcomere
BIOXI20: LOCOMOTION AND MOVEMENT
340075
Statement A : The myosin rich zone called A-band maintains its length during sarcomere contraction. Statement B : The length of I-band remains the same during muscle contraction
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, the I band is reduced in size as the overlap between the thick and thin filaments increases.
BIOXI20: LOCOMOTION AND MOVEMENT
340076
Sarcoplasmic reticulum is a storehouse of which ion
1 \(\mathrm{Ca}^{2+}\)
2 \(\mathrm{Na}^{+}\)
3 \(\mathrm{K}^{+}\)
4 \(\mathrm{Fe}^{2+}\)
Explanation:
The endoplasmic reticulum, i.e., sarcoplasmic reticulum of the muscle fibres is the store house of calcium ions.
BIOXI20: LOCOMOTION AND MOVEMENT
340077
The 'A' and 'I' bands are arranged ____throughout the length of the myofibrils.
1 Helically
2 Non alternately
3 Two of myosin and one of actin
4 Alternately
Explanation:
The 'A' and 'I' bands are arranged alternately throughout the length of the myofibrils.
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BIOXI20: LOCOMOTION AND MOVEMENT
340074
Sarcomere is a
1 Functional unit of contraction
2 Portion of myofibril present in between two Z-lines
3 Complete bundle of muscles
4 Both 1 and 2
Explanation:
The portion of the myofibril between two successive ' Z ' lines is considered as the functional unit of contraction and is called a sarcomere
BIOXI20: LOCOMOTION AND MOVEMENT
340075
Statement A : The myosin rich zone called A-band maintains its length during sarcomere contraction. Statement B : The length of I-band remains the same during muscle contraction
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
During muscle contraction, the I band is reduced in size as the overlap between the thick and thin filaments increases.
BIOXI20: LOCOMOTION AND MOVEMENT
340076
Sarcoplasmic reticulum is a storehouse of which ion
1 \(\mathrm{Ca}^{2+}\)
2 \(\mathrm{Na}^{+}\)
3 \(\mathrm{K}^{+}\)
4 \(\mathrm{Fe}^{2+}\)
Explanation:
The endoplasmic reticulum, i.e., sarcoplasmic reticulum of the muscle fibres is the store house of calcium ions.
BIOXI20: LOCOMOTION AND MOVEMENT
340077
The 'A' and 'I' bands are arranged ____throughout the length of the myofibrils.
1 Helically
2 Non alternately
3 Two of myosin and one of actin
4 Alternately
Explanation:
The 'A' and 'I' bands are arranged alternately throughout the length of the myofibrils.
