Exam 2 Slide show Muscle Tissue (Pt4)

Question 1

Myosin crossbridges detach only when what binds to the myosin heads?

Answer 1

ATP

Question 2

During muscle contractions, what DO NOT change lengths?

Answer 2

Thick and thin filaments

Question 3

During muscle contractions, What three things decrease in size?

Answer 3

The H zone, I band, and Sarcomere

Question 4

During muscle contractions, what DOES NOT change widths?

Answer 4

A band

Question 5

What starts in the body 3-4 hours after death?

Answer 5

Rigor mortis

Question 6

What is an increase in the diameter of muscle fibers?

Answer 6

Hypertrophy

Question 7

What is an increase in size of tissues and organs due to an increase in the number of cells?

Answer 7

Hyperplasia

Question 8

What is a decrease in the size of a cell, tissue, organ, or entire body?

Answer 8

Atrophy

Question 9

What is the dramatic muscle growth that occurs after birth due to?

Answer 9

Hypertrophy

Question 10

During childhood, the growth of skeletal muscle fibers is stimulated by what?

Answer 10

Hormones

Question 11

Which two hormones are they?

Answer 11

primarily human growth hormone and testosterone

Question 12

What binds oxygen in muscle cells and releases it when needed by the mitochondria during high levels of aerobic respiration?

Answer 12

Myoglobin (found only in muscle)

Question 13

What is ATP and Na+-K+ pumps necessary for in muscle fibers?

Answer 13

producing action potentials (active transport)

Question 14

What is necessary for a contraction to terminate?

Answer 14

ATP (calcium ion pumping)

Question 15

Cells store ATP in significant amounts. T/F

Answer 15

False; cells DO NOT store ATP in significant amounts

Question 16

What are three ways that ATP is produced?

Answer 16

• Creatine phosphate
• Glycolysis
• Aerobic respiration

Question 17

Relaxed muscle fibers produce ____ ATP than immediately needed

Answer 17

More

Question 18

What enzyme catalyzes the transfer of a high-energy phosphate from ATP to creatine?

Answer 18

creatine kinase (CK

Question 19

What is more plentiful than ATP in the sarcoplasm of a relaxed muscle ?

Answer 19

Creatine Kinase

Question 20

What is a series of reactions that breaks down glucose into pyruvic acid with the release of some small amount of ATP?

Answer 20

Glycolysis

Question 21

Where does glycolysis occur?

Answer 21

In the cytoplasm

Question 22

Who fast is glycolysis?

Answer 22

A fairly rapid process

Question 23

How does glycolysis utilize oxygen?

Answer 23

Does not require free oxygen, so it is an anaerobic process

Question 24

Is glycolysis an anaerobic respiration?

Answer 24

NO!!!! its only an anaerobic process

Question 25

In the three processes that make ATP, describe the rank the speed of those processes.

Answer 25

Creatine phosphate - Quick Process

Glycolysis - Rapid process

Aerobic respiration - SLOW PROCESS