Consider the following muscle biopsy stained in this manner. Identify the types
ID: 3515123 • Letter: C
Question
Consider the following muscle biopsy stained in this manner. Identify the types of the three fibers.
High glycogen content: (A) fast anaerobic fiber (B) Fast aerobic fiber (c) slow fiber
Medium glycogen content: (A) Fast aerobic fiber (B) Fast Anaerobic fiber (C) slow fiber
Low glycogen content (A) fast aerobic fiber (B) Slow fiber (C) Fast Anaerobic fiber
Based on its proportion of fiber types, this sample was most likely from a(n) _____(1)_______.
(a) marathon runner, (b) middle-distance runner (c) extreme-distance runner
Outside of the lab, chances are low that you will ever get a chance to biopsy and stain a muscle sample. However, you can easily observe differences in muscle composition by taking a quick stroll through the fresh seafood department at your local grocery store.
If you do, you may notice that tuna steaks are red, while the meat of most other fishes (sole, halibut, and so on) is white in color. Tuna are long-distance migratory fishes that swim hundreds or even thousands of miles to reach their breeding sites. Similar to endurance runners, tuna have skeletal muscles that are highly enriched in red -----(1)------- fibers. These fibers are red in color because they contain ------(2)----------.
(1). slow or fast anaerobic
(2) (a) actin, (b) myosin, (c) hemoglobin, (d) myoglobin
Consider the following muscle biopsy stained in this manner. Identify the types of the three fibers. High glycogen content Medium glycogen content Low glycogen content Dr. Gladden Willis Visuals Unlimited, Inc. / Getty Images Based on its proportion of fiber types, this sample was most likely from a(n) Outside of the lab, chances are low that you will ever get a chance to biopsy and stain a muscle sample. However, you can easily observe differences in muscle composition by taking a quick stroll through the fresh seafood department at your local grocery store. If you do, you may notice that tuna steaks are red, while the meat of most other fishes (sole, halibut, and so on) is white in color. Tuna are long-distance migratory fishes that swim hundreds or even thousands of miles to reach their breeding sites. Similar to endurance runners, tuna have skeletal muscles that are highly enriched in red fibers. These fibers are red in color because they containExplanation / Answer
ANSWER:
HIGH GLYCOGEN CONTENT :C.SLOW FIBER
It is the slow twitch less powerful smaller red muscle utilized in longterm for endurance activity with a smaller number of muscle fibers.
It fatigues less readily and it contains myoglobin due to which it is red.It works aerobically due to high myoglobin and mitochondria.
It has lower ATPase activity due to which it is slow.
example:postural muscles like soleus which maintain the posture during prolonged standing.
MEDIUM GLYCOGEN CONTENT:A.FAST AEROBIC FIBERS
Glucose of these muscle fibers are utilized fast to contribute to the aerobic activity.
LOW GLYCOGEN CONTENT:C.FAST ANAEROBIC FIBERS
These are the large powerful fast and white muscle fibers that are utilized for short term.
They contain large mass per motor unit with high ATPase activity.
They are used for high anaerobic glycolysis.
They contain very low myoglobin.
Example:ocular muscles of the eye.
BASED ON THE PROPORTION OF THE MUSCLE FIBERS THE SAMPLE IS FROM A.MARATHON RUNNER -Because of high glycogen content which is necessary for endurance and high capacity aerobic metabolism.
Tuna have skeletal muscles that are highly enriched in red SLOW TWITCH AND ENDURANCE fibers.
These fibers are red in color because they contain
1.SLOW:slow twitch associated with high aerobic metabolism.
2.MYOGLOBIN:high myoglobin is present.