All the following regarding red muscle fibers are true except:
1. | They are adapted for slow and sustained activity |
2. | They have a high content of myoglobin |
3. | They are rich in mitochondria |
4. | They depend on anaerobic process for energy |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
A flat bone present on the ventral midline of thorax is called as:
1. | Hyoid | 2. | Clavicle |
3. | Sternum | 4. | Vertebral body |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The central part of the thick filaments not overlapped by the thin filaments is called as:
1. | A band | 2. | I band |
3. | H zone | 4. | Sarcomere |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
What protein is arranged along the length of actin filaments and is involved in regulation of skeletal muscle contraction?
1. | Troponin | 2. | Calmodulin |
3. | Tropomyosin | 4. | Light meromyosin |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
During relaxation of a skeletal muscle:
1. | Calcium ions that are bound to troponin C now bind to troponin A |
2. | Cross bridge formation between myosin head and actin takes place |
3. | The A band of the sarcomere lengthens |
4. | Calcium ions are pumped back to the sarcoplasmic cisternae |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
What type of muscles do you expect to find in the inner walls of hollow visceral organs?
1. | Involuntary, nonstriated | 2. | Voluntary, nonstriated |
3. | Involuntary, striated | 4. | Voluntary, striated |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
During muscle contraction, when the myosin head releases ADP and iP it:
1. forms cross bridge with actin
2. pulls actin towards M-line
3. goes back to its relaxed state
4. gets detached from the cross bridge
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Muscle weakness because of abnormal neuromuscular junction activity is seen in:
1. | poliomyelitis | 2. | myasthenia gravis |
3. | multiple sclerosis | 4. | muscular dystrophy |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Which of the following masks the active sites on actin when a skeletal muscle is relaxed?
1. | Tropomyosin | 2. | Troponin |
3. | Calmodulin | 4. | Ubiquitin |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
All the following are cranial bones except:
1. | Ethmoid | 2. | Sphenoid |
3. | Temporal | 4. | Zygomatic |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.