Show:
Muscle Tissue
Skeletal Muscle Anatomy
Sliding Filament Model
Physiology of Contraction
Muscle Metabolism & More
100

Identify two types of involuntary muscle tissues.

Cardiac and smooth muscle tissue

100

Identify the name of the connective tissue sheath that surrounds each individual muscle fiber.

Endomysium

100

True or False: The A bands lengthens during muscle contraction.

False: The A band does not change length during muscle contraction.

100

_____________ make connections between the brain/spinal cord and skeletal muscle.

Motor neurons

100

Mrs. Trevino attempts to lift her car. What type of contraction is performed by her biceps muscle?

Isometric contraction

200

What does the prefix sarco mean?

Muscle
200

Which muscle is extended when you lift a book off the table?

Triceps

200

What ion is responsible for binding to troponin and changing the orientation of tropomyosin?

Calcium

200

Identify the neurotransmitter released from the synaptic vesicles into the synaptic cleft.

ACh (acetylcholine)

200

What mechanism for ATP regeneration is the most efficient?

Phosphorylation of ADP by creatine phosphate

300

What property of muscle tissue makes it like a rubber band?

Elasticity


300

The muscle attachment that is immovable or less movable is called the _________.

origin

300

True or false: ADP and phosphate are bound to myosin head during the power stroke.

False; nothing is bound to the myosin head during power stroke

300

What ion enters the axon terminal and causes the contents of the synaptic vesicles to be released into the synaptic cleft?

Calcium

300

What type of ATP regeneration leads to muscle cramping and fatigue?

Lactic Acid fermentation (anaerobic mechanism)

400

What is the function of smooth muscle?

To propel or force substances through internal body channels

400

Identify two regions of the sarcomere that shorten during muscle contraction.

H zone and I band

400
Where in the muscle cell are T-tubules located?

Deep in the skeletal muscle

400

What causes the sarcolemma to be depolarized?

Na moving into the skeletal muscle cell and K moving out

400

Write a simple equation for aerobic respiration. Using only words and a reaction arrow is okay.

glucose + oxygen ---> CO2 + water + ATP

500

List the 4 functions of muscles

movement, maintaining posture, stabilizing joints, and generating heat
500
Identify the two molecules stored in the sarcoplasm in large amounts.

Glycosomes (stored glucose) and myoglobin

500

What two factors lead to muscle relaxation?

1. Reuptake of calcium into the sarcoplasmic reticulum

2. ATP binds to the myosin head, causing cross-bridge detachment

500
Describe the relationship between ATP and calcium ions taken up into the sarcoplasmic reticulum.

ATP is used in active transport (against the concentration gradient) of calcium into the sarcoplasmic reticulum

500

What is the effect of aerobic exercise on the muscles?

more efficient muscle metabolism. NOT muscle growth or size of muscle