A) are characteristic of smooth muscle cells B) contain gap junctions that allow the signal to spread quickly through cardiac muscle cells C) support fast-twitch fibers of skeletal muscle D) stimulate pacemaker cells in cardiac muscle E) stimulate the contraction of skeletal muscle A) are characteristic of smooth muscle cells B) contain gap junctions that allow the signal to spread quickly through cardiac muscle cells C) support fast-twitch fibers of skeletal muscle D) stimulate pacemaker cells in cardiac muscle E) stimulate the contraction of skeletal muscle

Exam 6: The Muscular System

In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

(Multiple Choice)

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Question 41

In comparing all three major muscle types, which one of the following statements best describes the differences between them?

(Multiple Choice)

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Question 42

The heads of myosin molecules contact the actin filaments when a muscle is relaxed.

(True/False)

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Question 43

Cells in cardiac muscle that determine the rate of contraction are ________ cells.

(Short Answer)

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Question 44

Muscle soreness several days after exercise is an indication that some sarcomeres were permanently damaged.

(True/False)

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Question 45

During a marathon, runners use up ATP and glucose early in the race. Which energy source is generally used next for producing more ATP?

(Multiple Choice)

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Question 46

As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are

(Multiple Choice)

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Question 47

Match each disorder or disease of the muscular system with its description.

a group of muscular diseases that are hereditary; resulting in muscle wasting; no cure

fasciitis

disease caused by a bacterial infection; bacterial toxin affects primarily the muscles of the jaw and neck; also known as "lockjaw"

tetanus

inflammation of the connective tissue layers surrounding a muscle; common in the sole of the foot

muscular dystrophy

Correct Answer:

Verified

a group of muscular diseases that are hereditary; resulting in muscle wasting; no cure

disease caused by a bacterial infection; bacterial toxin affects primarily the muscles of the jaw and neck; also known as "lockjaw"

inflammation of the connective tissue layers surrounding a muscle; common in the sole of the foot

uncontrolled contraction of muscle, usually after heavy exercise

(Matching)

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Question 48

Intercalated discs

(Multiple Choice)

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Question 49

Which one of the following is an example of an isometric contraction?

(Multiple Choice)

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Question 50

A student, who was late for class, bounded up four flights of steps, ran down the hall, and then arrived in his classroom, huffing and puffing. This student was breathing hard in order to reverse his body's ________.

(Short Answer)

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Question 51

What is the role of calcium ions during contraction of a skeletal muscle?

(Essay)

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Question 52

Fast-twitch fibers contain large amounts of myoglobin and predominate in "red" muscle.

(True/False)

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Question 53

Skeletal muscle groups that work together to create the same movement are referred to as

(Multiple Choice)

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Question 54

Following electrical stimulation of a muscle cell, calcium functions to

(Multiple Choice)

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Question 55

Following intense exercise, the human body attempts to overcome oxygen debt by

(Multiple Choice)

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Question 56

In the absence of calcium, myosin cannot contact actin because of the presence of the ________ covering the myosin binding sites on actin.

(Short Answer)

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Question 57

If your goal was to become an endurance athlete, what type of training should you select, and why, to increase performance?

(Essay)

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Question 58

The primary energy source used by muscle cells to generate ATP is

(Multiple Choice)

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Question 59

The electrical impulse generated by a muscle cell membrane is transmitted to the sarcoplasmic reticulum by ________.

(Short Answer)

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Question 60

Showing 41 - 60 of 83

Exam 6: The Muscular System

In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

In comparing all three major muscle types, which one of the following statements best describes the differences between them?

The heads of myosin molecules contact the actin filaments when a muscle is relaxed.

Cells in cardiac muscle that determine the rate of contraction are ________ cells.

Muscle soreness several days after exercise is an indication that some sarcomeres were permanently damaged.

During a marathon, runners use up ATP and glucose early in the race. Which energy source is generally used next for producing more ATP?

As part of your fitness training, you do biceps curls lifting two 10-lb weights. The muscle contractions enabling these movements are

Intercalated discs

Which one of the following is an example of an isometric contraction?

A student, who was late for class, bounded up four flights of steps, ran down the hall, and then arrived in his classroom, huffing and puffing. This student was breathing hard in order to reverse his body's ________.

What is the role of calcium ions during contraction of a skeletal muscle?

Fast-twitch fibers contain large amounts of myoglobin and predominate in "red" muscle.

Skeletal muscle groups that work together to create the same movement are referred to as

Following electrical stimulation of a muscle cell, calcium functions to

Following intense exercise, the human body attempts to overcome oxygen debt by

In the absence of calcium, myosin cannot contact actin because of the presence of the ________ covering the myosin binding sites on actin.

If your goal was to become an endurance athlete, what type of training should you select, and why, to increase performance?

The primary energy source used by muscle cells to generate ATP is

The electrical impulse generated by a muscle cell membrane is transmitted to the sarcoplasmic reticulum by ________.

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