Question 1

The area in the center of the A band that contains no thin filaments is the

Accepted Answer

A) Z line. 
B) M line. 
C) H band. 
D) I band. 
E) zone of overlap. 
A) Z line. 
B) M line. 
C) H band. 
D) I band. 
E) zone of overlap.

Question 2

Figure 10-2 Muscle Contractions
Use Figure 10-2 to answer the following question:
-What is the contraction in graph (d)called?

Accepted Answer

A) complete tetanus 
B) incomplete tetanus 
C) twitch 
D) wave summation 
E) treppe 
A) complete tetanus 
B) incomplete tetanus 
C) twitch 
D) wave summation 
E) treppe

Question 3

Triggering of the muscle action potential occurs after

Accepted Answer

A) acetylcholine binds to chemically-gated channels in the end plate membrane. 
B) acetylcholinesterase binds to receptors on the end plate. 
C) calcium ion binds to channels on the end plate. 
D) the nerve action potential jumps across the neuromuscular junction. 
E) Any of the above can produce an action potential in the muscle cell. 
A) acetylcholine binds to chemically-gated channels in the end plate membrane. 
B) acetylcholinesterase binds to receptors on the end plate. 
C) calcium ion binds to channels on the end plate. 
D) the nerve action potential jumps across the neuromuscular junction. 
E) Any of the above can produce an action potential in the muscle cell.

Question 4

Active sites become exposed when calcium ions bind to ________.

Accepted Answer

The answer of Active sites become exposed when calcium ions...

Question 5

Suppose that you try to pick up an object and discover that it is much heavier than you expected. Which process must occur in the muscle to increase tension so you can pick up the object?

Accepted Answer

A) wave summation 
B) isotonic contraction 
C) complete tetanus 
D) recruitment 
E) treppe 
A) wave summation 
B) isotonic contraction 
C) complete tetanus 
D) recruitment 
E) treppe

Question 6

The complex of a transverse tubule and two adjacent terminal cisternae is known as a ________.

Accepted Answer

The answer of The complex of a transverse tubule and...

Question 7

The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)

Accepted Answer

A) fascicle. 
B) tendon. 
C) ligament. 
D) epimysium. 
E) myofibril. 
A) fascicle. 
B) tendon. 
C) ligament. 
D) epimysium. 
E) myofibril.

Question 8

A fascicle is

Accepted Answer

A) a group of muscle fibers that are encased in the perimysium. 
B) the belly of a muscle. 
C) a group of muscle fibers that are all part of the same motor unit. 
D) a group of muscle fibers and motor neurons. 
E) a collection of myofibrils in a muscle fiber. 
A) a group of muscle fibers that are encased in the perimysium. 
B) the belly of a muscle. 
C) a group of muscle fibers that are all part of the same motor unit. 
D) a group of muscle fibers and motor neurons. 
E) a collection of myofibrils in a muscle fiber.

Question 9

Muscle fibers differ from "typical cells" in that muscle fibers

Accepted Answer

A) lack a plasma membrane. 
B) have many nuclei. 
C) are very small. 
D) lack mitochondria. 
E) have large gaps in the cell membrane. 
A) lack a plasma membrane. 
B) have many nuclei. 
C) are very small. 
D) lack mitochondria. 
E) have large gaps in the cell membrane.

Question 10

The muscle weakness of myasthenia gravis results from

Accepted Answer

A) insufficient acetylcholine release from presynaptic vesicles. 
B) loss of acetylcholine receptors in the end-plate membrane. 
C) the motor neuron action potential being too small to shock the muscle fibers. 
D) excessive acetylcholinesterase that destroys the neurotransmitter. 
E) inability of the muscle fiber to produce ATP. 
A) insufficient acetylcholine release from presynaptic vesicles. 
B) loss of acetylcholine receptors in the end-plate membrane. 
C) the motor neuron action potential being too small to shock the muscle fibers. 
D) excessive acetylcholinesterase that destroys the neurotransmitter. 
E) inability of the muscle fiber to produce ATP.

Question 11

The following is a list of the events that occur during a muscle contraction. 1.Myosin cross-bridges bind to the actin.
2)The free myosin head splits ATP.
3)Calcium ion is released from the sarcoplasmic reticulum.
4)The myosin head pivots toward the center of the sarcomere.
5)Calcium ion binds to troponin.
6)The myosin head binds an ATP molecule and detaches from the actin.
The correct sequence of these events is

Accepted Answer

A) 1,3,5,4,6,2. 
B) 5,1,4,6,2,3. 
C) 3,5,1,2,4,6. 
D) 3,5,1,4,6,2. 
E) 1,4,6,2,3,5. 
A) 1,3,5,4,6,2. 
B) 5,1,4,6,2,3. 
C) 3,5,1,2,4,6. 
D) 3,5,1,4,6,2. 
E) 1,4,6,2,3,5.

Question 12

Decreased blood flow to a muscle could result in all of the following,except

Accepted Answer

A) muscle fatigue. 
B) an oxygen debt. 
C) an increase in intracellular glycogen. 
D) a shift to anaerobic glycolysis. 
E) an increase in intracellular lactic acid. 
A) muscle fatigue. 
B) an oxygen debt. 
C) an increase in intracellular glycogen. 
D) a shift to anaerobic glycolysis. 
E) an increase in intracellular lactic acid.

Question 13

The skeletal muscle complex known as the triad consists of

Accepted Answer

A) actin,myosin,and filaments. 
B) a transverse tubule and two terminal cisternae. 
C) filaments,myofibrils,and sarcomeres. 
D) A bands,H bands,and I bands. 
E) actin,myosin,and sarcomeres. 
A) actin,myosin,and filaments. 
B) a transverse tubule and two terminal cisternae. 
C) filaments,myofibrils,and sarcomeres. 
D) A bands,H bands,and I bands. 
E) actin,myosin,and sarcomeres.

Question 14

Heat energy produced from muscle contraction is released by the ________ system.

Accepted Answer

A) integumentary 
B) respiratory 
C) cardiovascular 
D) urinary 
E) endocrine 
A) integumentary 
B) respiratory 
C) cardiovascular 
D) urinary 
E) endocrine

Question 15

Each skeletal muscle fiber contains ________ myofibrils.

Accepted Answer

A) 50 to 100 
B) 100 to 150 
C) 150 to 200 
D) 200 to 500 
E) hundreds to thousands 
A) 50 to 100 
B) 100 to 150 
C) 150 to 200 
D) 200 to 500 
E) hundreds to thousands

Exam 10: Muscle Tissue

The area in the center of the A band that contains no thin filaments is the

Figure 10-2 Muscle Contractions Use Figure 10-2 to answer the following question: -What is the contraction in graph (d)called?

Triggering of the muscle action potential occurs after

Active sites become exposed when calcium ions bind to ________.

Suppose that you try to pick up an object and discover that it is much heavier than you expected. Which process must occur in the muscle to increase tension so you can pick up the object?

The complex of a transverse tubule and two adjacent terminal cisternae is known as a ________.

The bundle of collagen fibers at the end of a skeletal muscle that attaches the muscle to bone is called a(n)

A fascicle is

Muscle fibers differ from "typical cells" in that muscle fibers

The muscle weakness of myasthenia gravis results from

Decreased blood flow to a muscle could result in all of the following,except

The skeletal muscle complex known as the triad consists of

Heat energy produced from muscle contraction is released by the ________ system.

Each skeletal muscle fiber contains ________ myofibrils.

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Articulations

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Neural Integration I: Sensory Pathways and the Somatic Nervous System

Neural Integration Ii: the Autonomic Nervous System and

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters