1 answer

1. A closer look - Muscles and their role in health and energy needs of athletes...

Question:

1. A closer look - Muscles and their role in health and energy needs of athletes

Skeletal muscles, which move bones, consist of cells fused into long fibers. These muscle fibers can increase in size when contracted, which is what happens as a result of some exercise. This animation shows the structure of vertebrate skeletal muscles. It starts at a large scale, showing the muscles of a human upper arm, and then gradually zooms in to smaller and smaller levels, labeling each structure along the way. Watch the animation and then answer the question that follows.

Many bundles of skeletal muscle fibers grouped together form a     .

a.myofibril

b.sarcomere

c.skeletal muscle

The increase in volume of the muscle fibers due to the enlargement of its components is referred to as     .

a.hypertrophy

b.atrophy

c.hyperplasia

Kevin and Dmitri are friends who both enjoy exercise. They are a similar height and weight and both are in good shape, but they have different workout activities. One does primarily aerobic exercise, and the other does primarily anaerobic exercise. They both enroll in a study that measures the concentration of lactate in their blood over the course of their normal workouts.

The following charts present the results of the study and show the percent of lactate concentration in each man's blood over the course of their workouts, measured at two-minute intervals.

On the following graph, use the points indicated in the charts to graph the results of the study for each man. Click and drag the points on the right-hand side of the graph onto the grid of the graph; line segments will automatically connect the points. Remember to plot from left to right. There are 6 points for each man, so when you are done, there should be 12 total points on the graph. Look at the pattern the points make, and then answer the question that follows.

Kevin's Lactate Concentration in the Blood (Blue points, circle symbol)

Duration of exercise (Minutes) 0 2 4 6 8 10
Lactate concentration in the blood (Percent) 0 15 25 35 45 50

Dmitri's Lactate Concentration in the Blood (Orange points, square symbol)

Duration of exercise (Minutes) 0 2 4 6 8 10
Lactate concentration in the blood (Percent) 0 5 10 10 15 20

KevinDmitri024681050403020100Lactate concentration in the blood (Percent)Duration of exercise (Minutes)10, 20

Which man is doing a workout that primarily involves anaerobic exercise?

Kevin

Dmitri

In the previous question, you identified the individual who was completing aerobic exercise. This aerobic exercise helps to increase  

a.musculoskeletal fitness

b. flexibility

c.cardio respiratory fitness

, or the ability to perform moderate-to-high-intensity activity involving large muscle groups for long periods of time.

Identify the activities that would most likely improve an individual’s cardiorespiratory fitness.  Check all that apply.

Bench pressing

Stretching

Triathlon

Running

The excitation, contraction, and relaxation of skeletal muscle require the use of ATP. Because only limited stores of ATP are immediately available in muscle tissue, ATP must be continually supplied if contractile activity is to continue.

Depending on the type of movement or exercise, one or more pathways can be used to provide the most efficient way of supplying the ATP.

© kupicoo / Getty Images

For example, a friend of yours goes to the gym and takes a 30-minute, cardio interval training class. While switching between doing high-intensity push-ups, jumping jacks, and weight training, she notices that there is a burning sensation in her muscles.

The burning is due to the buildup of

a.creatine phosphate

b.lactate

c.alcohol

in the muscle tissue, a result of her muscles supplying ATP   .

a.anaerobically

b. aerobically

What is true about this pathway for forming ATP? Check all that apply.

a.This pathway typically utilizes creatine phosphate supplies to provide short bursts of high-intensity contractile effort.

b.Known as glycolysis, this pathway is ideal for endurance-type exercises, where glycogen stores are slowly and steadily depleted to provide a consistent rate of ATP production.

c.This pathway is typically used when oxygen delivery or oxidative phosphorylation capacity is exceeded.

d.Compared to oxidative phosphorylation, this pathway can generate ATP more rapidly but also depletes glycogen stores more rapidly.


Answers

Many bundles of skeletal muscle fibers grouped together form a skeletal muscle.

Myofibril are tied up together inside a muscle cell.

Sarcomere is a basic unit of myofibril.

The increase in volume of the muscle fibers due to the enlargement of its components is referred to as hypertrophy.

Hyperplasia is increase in number of cells.  

Atrophy is wasting or reduction in size of cell.

.

Similar Solved Questions

1 answer
Let q be a prime and let m and n be non-zero integers. Prove that if...
Let q be a prime and let m and n be non-zero integers. Prove that if m and n are coprime and q? divides mn, then q? divides m or q? divides n...
1 answer
An employee group for a retailer claims that the mean time spent by employees on a...
An employee group for a retailer claims that the mean time spent by employees on a personal phone call is less than 10 minutes per day. A random sample of 25 employees is taken and showed a mean of 9.2 minutes and a standard deviation of 2 minutes. Test the claim with a 5% significance level the tim...
1 answer
In the polynomial #(x-1)(x-2)(x-3)cdots(x-100)#. Find the coefficient of #x^99# is?
In the polynomial #(x-1)(x-2)(x-3)cdots(x-100)#. Find the coefficient of #x^99# is?...
1 answer
Physics 51A Spring 2017 May 31, 2017 Week 9 As shown in Example 7.2, the expectation...
Physics 51A Spring 2017 May 31, 2017 Week 9 As shown in Example 7.2, the expectation value of a measurable quantity can be determined by ’sandwiching’ the quantity in between ψ ∗ and ψ and integrating over all space where ψ is nonzero: < x >= Z a 0 ψ ∗...
1 answer
A project has an initial outlay of $1,819. It has a single cash flow at the...
A project has an initial outlay of $1,819. It has a single cash flow at the end of year 8 of $5,334. What is the internal rate of return (IRR) for the project? Round the answer to two decimal places in percentage form....
1 answer
*BACH NETE Question You are told that a note has repayment terms of $5,000 per year...
*BACH NETE Question You are told that a note has repayment terms of $5,000 per year for 5 years, with a stated interest rate of 6. How much of the total payment is for principal, and how much is for interest? (For calculation purposes, use s decimal places as displayed in the factor table provided. ...
1 answer
Journal entry worksheet < 1 A company provides services to customers for $3,800 cash. Note: Enter...
Journal entry worksheet < 1 A company provides services to customers for $3,800 cash. Note: Enter debits before credits. Transaction General Journal Debit Credit 1 Record entry Clear entry View general journal...
1 answer
Identify which specific qualitative characteristic of accounting information is best described in each item below A)...
Identify which specific qualitative characteristic of accounting information is best described in each item below A) The annual financial reports of Treelivingo Corp. are audited by public accountants B) Able Corp. and Mona Inc. both use the straight-line depreciation method. C) Global Corp. issues ...
1 answer
Choose one out of paracrine signalling, endocrine signalling, autocrine signalling and direct signalling and describe briefly...
Choose one out of paracrine signalling, endocrine signalling, autocrine signalling and direct signalling and describe briefly the process by which this occurs. Pick a representative signal molecule from the pathway you have chosen and indicate its function, the type of cell in which it is made and t...
1 answer
Triose Phosphate Isomerase has an important feature in the Energy Production phase of glycolysis. PEP inhibits...
Triose Phosphate Isomerase has an important feature in the Energy Production phase of glycolysis. PEP inhibits this enzyme. Compare the function of triose phosphate isomerase before and after its inhibition, as well as the consequences of the inhibition....
1 answer
Consider an economy that produces food and houses. Assume the economy is working efficiently. We can...
Consider an economy that produces food and houses. Assume the economy is working efficiently. We can produce more houses without reducing food production if there is a technological improvement in the growing of crops (ex. better genetic technology that allows the economy to produce more food for a ...
1 answer
< Question 7 (of 7) Seve Ed Submit 10.00 points Kody Corporation uses a job-order costing...
< Question 7 (of 7) Seve Ed Submit 10.00 points Kody Corporation uses a job-order costing system with a plantwide overhead rate based on machine-hours. At the beginning of the year, the company made the following estimates: 155.000 652.000 Machine-hours required to support estimated production Fi...
1 answer
Mayfield Corporation has provided the following financial data: Balance Sheet Assets Current assets: Cash $ 288,000...
Mayfield Corporation has provided the following financial data: Balance Sheet Assets Current assets: Cash $ 288,000 Accounts receivable, net 301,000 Inventory 228,000 Prepaid expenses 23,000 Total current assets 840,000 Plant and equipment, net 730,000 Total asset...
1 answer
You put a can of soda at 300 K in a ice-filled cooler to cool down....
You put a can of soda at 300 K in a ice-filled cooler to cool down. Some time later, you take it out, and it has reached 275 K. A total of 37 kJ of heat flowed from the soda into the cooler, but the cooler is much larger and its temperature stayed constant at 273 K. What is the change in entropy of ...
1 answer
Coded in Java. Also advised to use class java.util.HashMap Problem 1 You are given an array...
Coded in Java. Also advised to use class java.util.HashMap Problem 1 You are given an array A of integers and an integer k. Implement an algorithm that determines, in linear time, the smallest integer that appears at least k times in A. Problem 2 You are given an array A of integers and an integer k...
1 answer
Balance Sheet Classification
Explain how the liability should be classified on the balance sheet if a business owes a mortgage note payable of $350,000, the term of which provide for monthlypayments 7,000....
1 answer
Which of the following stock price indexes is a price--weighted index? a) Dow Jones Industrial Average...
Which of the following stock price indexes is a price--weighted index? a) Dow Jones Industrial Average b) Standard & Poor's 500 Index c) Nasdaq d) Wilshire 5000...