Exp. A Sarcomere is the fundamental unit of contraction and is defined as the region between two z-lines - Each sarcomere consist of central A-band (thick filaments) and two halves of the I-band (thin filaments) the I-band from two adjacent sarcomere meets at the Z-lines. - Light gray circles demark thick (myosin) filaments and black circles demark thin (active) filaments.
2004
Locomotion and Movement
238271
Hensen's disc in a myofibril is less than the edges of the A-band due to
1 Presence of thick filaments only
2 Presence of thin filaments only
3 Presence of both thick and thin filaments
4 Presence of Krause's membrane
Explanation:
Exp. A Hensen's disc is the central region of the Aband in a myofibril. This region appears lighter because it contains thick filaments (myosin) but lacks overlapping thin filaments (actin). The presence of only thick filaments in the \(\mathrm{H}\)-zone results in a less dense appearance compared to the edges of the A-band, which contain both thick and thin filaments.
Shift-II
Locomotion and Movement
238272
Identify the correct option Statement - I : The contraction of internal intercostals muscles and lateral abdominal muscles help in forced expiration Statement - II : The contraction of phrenic muscles increases the volume of the thoracic cavity in antero-posterior axis
1 Statement I and II are correct
2 Statement I is wrong and II is correct
3 Statement I is correct and II is wrong
4 Statement I and II wrong
Explanation:
Exp. A Statement-I is correct- The internal intercostal muscles and lateral abdominal muscles are involved in forced expiration. When these muscles contract, they pull the ribs down and inwards, which reduces the volume of the thoracic cavity. Statement-II is also correct- The phrenic muscles are the muscles that attach to the diaphragm. When these muscles contract, they pull the diaphragm downwards, which increase the volume of the thoracic cavity in the anteroposterior axis. So, both statements are correct.
AP EAPCET-23.05.2023
Locomotion and Movement
238273
Repeated activation of skeletal muscle leads to
1 Accumulation of lactic acid
2 Release of calcium ions
3 Glucose synthesis
4 Recovery from fatigue
Explanation:
Exp. A Repeated activation of skeletal muscle leads to accumulation of lactic acid. Because lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of oxygen.
Exp. A Sarcomere is the fundamental unit of contraction and is defined as the region between two z-lines - Each sarcomere consist of central A-band (thick filaments) and two halves of the I-band (thin filaments) the I-band from two adjacent sarcomere meets at the Z-lines. - Light gray circles demark thick (myosin) filaments and black circles demark thin (active) filaments.
2004
Locomotion and Movement
238271
Hensen's disc in a myofibril is less than the edges of the A-band due to
1 Presence of thick filaments only
2 Presence of thin filaments only
3 Presence of both thick and thin filaments
4 Presence of Krause's membrane
Explanation:
Exp. A Hensen's disc is the central region of the Aband in a myofibril. This region appears lighter because it contains thick filaments (myosin) but lacks overlapping thin filaments (actin). The presence of only thick filaments in the \(\mathrm{H}\)-zone results in a less dense appearance compared to the edges of the A-band, which contain both thick and thin filaments.
Shift-II
Locomotion and Movement
238272
Identify the correct option Statement - I : The contraction of internal intercostals muscles and lateral abdominal muscles help in forced expiration Statement - II : The contraction of phrenic muscles increases the volume of the thoracic cavity in antero-posterior axis
1 Statement I and II are correct
2 Statement I is wrong and II is correct
3 Statement I is correct and II is wrong
4 Statement I and II wrong
Explanation:
Exp. A Statement-I is correct- The internal intercostal muscles and lateral abdominal muscles are involved in forced expiration. When these muscles contract, they pull the ribs down and inwards, which reduces the volume of the thoracic cavity. Statement-II is also correct- The phrenic muscles are the muscles that attach to the diaphragm. When these muscles contract, they pull the diaphragm downwards, which increase the volume of the thoracic cavity in the anteroposterior axis. So, both statements are correct.
AP EAPCET-23.05.2023
Locomotion and Movement
238273
Repeated activation of skeletal muscle leads to
1 Accumulation of lactic acid
2 Release of calcium ions
3 Glucose synthesis
4 Recovery from fatigue
Explanation:
Exp. A Repeated activation of skeletal muscle leads to accumulation of lactic acid. Because lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of oxygen.
Exp. A Sarcomere is the fundamental unit of contraction and is defined as the region between two z-lines - Each sarcomere consist of central A-band (thick filaments) and two halves of the I-band (thin filaments) the I-band from two adjacent sarcomere meets at the Z-lines. - Light gray circles demark thick (myosin) filaments and black circles demark thin (active) filaments.
2004
Locomotion and Movement
238271
Hensen's disc in a myofibril is less than the edges of the A-band due to
1 Presence of thick filaments only
2 Presence of thin filaments only
3 Presence of both thick and thin filaments
4 Presence of Krause's membrane
Explanation:
Exp. A Hensen's disc is the central region of the Aband in a myofibril. This region appears lighter because it contains thick filaments (myosin) but lacks overlapping thin filaments (actin). The presence of only thick filaments in the \(\mathrm{H}\)-zone results in a less dense appearance compared to the edges of the A-band, which contain both thick and thin filaments.
Shift-II
Locomotion and Movement
238272
Identify the correct option Statement - I : The contraction of internal intercostals muscles and lateral abdominal muscles help in forced expiration Statement - II : The contraction of phrenic muscles increases the volume of the thoracic cavity in antero-posterior axis
1 Statement I and II are correct
2 Statement I is wrong and II is correct
3 Statement I is correct and II is wrong
4 Statement I and II wrong
Explanation:
Exp. A Statement-I is correct- The internal intercostal muscles and lateral abdominal muscles are involved in forced expiration. When these muscles contract, they pull the ribs down and inwards, which reduces the volume of the thoracic cavity. Statement-II is also correct- The phrenic muscles are the muscles that attach to the diaphragm. When these muscles contract, they pull the diaphragm downwards, which increase the volume of the thoracic cavity in the anteroposterior axis. So, both statements are correct.
AP EAPCET-23.05.2023
Locomotion and Movement
238273
Repeated activation of skeletal muscle leads to
1 Accumulation of lactic acid
2 Release of calcium ions
3 Glucose synthesis
4 Recovery from fatigue
Explanation:
Exp. A Repeated activation of skeletal muscle leads to accumulation of lactic acid. Because lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of oxygen.
Exp. A Sarcomere is the fundamental unit of contraction and is defined as the region between two z-lines - Each sarcomere consist of central A-band (thick filaments) and two halves of the I-band (thin filaments) the I-band from two adjacent sarcomere meets at the Z-lines. - Light gray circles demark thick (myosin) filaments and black circles demark thin (active) filaments.
2004
Locomotion and Movement
238271
Hensen's disc in a myofibril is less than the edges of the A-band due to
1 Presence of thick filaments only
2 Presence of thin filaments only
3 Presence of both thick and thin filaments
4 Presence of Krause's membrane
Explanation:
Exp. A Hensen's disc is the central region of the Aband in a myofibril. This region appears lighter because it contains thick filaments (myosin) but lacks overlapping thin filaments (actin). The presence of only thick filaments in the \(\mathrm{H}\)-zone results in a less dense appearance compared to the edges of the A-band, which contain both thick and thin filaments.
Shift-II
Locomotion and Movement
238272
Identify the correct option Statement - I : The contraction of internal intercostals muscles and lateral abdominal muscles help in forced expiration Statement - II : The contraction of phrenic muscles increases the volume of the thoracic cavity in antero-posterior axis
1 Statement I and II are correct
2 Statement I is wrong and II is correct
3 Statement I is correct and II is wrong
4 Statement I and II wrong
Explanation:
Exp. A Statement-I is correct- The internal intercostal muscles and lateral abdominal muscles are involved in forced expiration. When these muscles contract, they pull the ribs down and inwards, which reduces the volume of the thoracic cavity. Statement-II is also correct- The phrenic muscles are the muscles that attach to the diaphragm. When these muscles contract, they pull the diaphragm downwards, which increase the volume of the thoracic cavity in the anteroposterior axis. So, both statements are correct.
AP EAPCET-23.05.2023
Locomotion and Movement
238273
Repeated activation of skeletal muscle leads to
1 Accumulation of lactic acid
2 Release of calcium ions
3 Glucose synthesis
4 Recovery from fatigue
Explanation:
Exp. A Repeated activation of skeletal muscle leads to accumulation of lactic acid. Because lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement and insufficient supply of oxygen.
