Muscles

Question 1

The contracting proteins within a muscle fiber

Answer 1

myosin and actin

Question 2

When a muscle contracts it:

Answer 2

shortens and pulls a bone

Question 3

Muscles are attached to bone by:

Answer 3

tendons

Question 4

Some oxygen may be stored within the muscle fibers bonded to the protein

Answer 4

myoglobin

Question 5

An antagonist to a muscle that flexes the arm would be a muscle that:

Answer 5

extends the arm

Question 6

The axon terminal of a motor neuron releases:

Answer 6

acetylcholine

Question 7

Acetylcholine makes the sarcolemma more permeable to:

Answer 7

sodium ions

Question 8

The most abundant source of energy in a muscle fiber is:

Answer 8

glycogen

Question 9

The part of the brain that coordinates voluntary movement is the:

Answer 9

cerebellum

Question 10

The neuromuscular junction refers to the:

Answer 10

axon terminal, synapse, and sarcolemma

Question 11

Unconscious muscle sense is integrated by the:

Answer 11

cerebellum, and we are unaware of it

Question 12

The move moveable attachment of a muscle to a bone is called the:

Answer 12

insertion

Question 13

Good muscle tone is important because:

Answer 13

maintain posture and produce body heat

Question 14

Muscle fatigue is the result of the lack of ___ and the production of ___

Answer 14

1. oxygen

2. lactic acid

Question 15

The specific part of the brain that initiates muscle contraction is the:

Answer 15

fontal lobe

Question 16

During exercise, the blood flow within a muscle is increased by:

Answer 16

vasoldilation

Question 17

The product of cell respiration that is considered a waste product is:

Answer 17

carbon dioxide

Question 18

The organ system that transports oxygen to muscles and removes carbon dioxide is the:

Answer 18

circulatory system

Question 19

The energy of ATP is released within the muscle fibers by:

Answer 19

myosin

Question 20

In response to a nerve impulse, the electrical changes on the sarcolemma are reversed. This is called:

Answer 20

depolarization

Question 21

Synergistic muscles are those that have the same:

Answer 21

function

Question 22

An isometric contraction is one:

Answer 22

without movement

Question 23

The inhibiting proteins within a muscle fibers are:

Answer 23

troponin and tropomyosin

Question 24

A nitrogenous waste product of muscle contraction is ___, which is excreted by the ____.

Answer 24

1. creatinine

2. kidneys

Question 25

The mineral released within sarcomeres to trigger contraction is:

Answer 25

potassium