Question 1

The brachialis and brachioradialis

Accepted Answer

A)  flex the forearm at the elbow. 
B)  extend the hand. 
C)  are antagonistic to the biceps brachii. 
D)  shrug the shoulders. 
A)  flex the forearm at the elbow. 
B)  extend the hand. 
C)  are antagonistic to the biceps brachii. 
D)  shrug the shoulders.

Question 2

Which group is incorrect?

Accepted Answer

A)  Muscles in the lower extremities: hamstrings, quadriceps, gastrocnemius 
B)  Muscles involved in breathing: diaphragm, intercostals, hamstrings 
C)  Terms that describe the muscle activity of a whole muscle: twitch, tetany 
D)  Muscles in the upper extremities: triceps brachii, biceps brachii, pronators 
A)  Muscles in the lower extremities: hamstrings, quadriceps, gastrocnemius 
B)  Muscles involved in breathing: diaphragm, intercostals, hamstrings 
C)  Terms that describe the muscle activity of a whole muscle: twitch, tetany 
D)  Muscles in the upper extremities: triceps brachii, biceps brachii, pronators

Question 3

Which of the following is least related to the platysma?

Accepted Answer

A)  Pouting muscle 
B)  Squinting 
C)  Inserts on the mandible 
D)  "Close your mouth," says the dentist 
A)  Pouting muscle 
B)  Squinting 
C)  Inserts on the mandible 
D)  "Close your mouth," says the dentist

Question 4

Actin is

Accepted Answer

A)  located within the neuromuscular junction. 
B)  a contractile protein that is part of the thin filament. 
C)  called the thick filament. 
D)  stored within the sarcoplasmic reticulum. 
A)  located within the neuromuscular junction. 
B)  a contractile protein that is part of the thin filament. 
C)  called the thick filament. 
D)  stored within the sarcoplasmic reticulum.

Question 5

With regard to skeletal muscle contraction,which event comes first?

Accepted Answer

A)  Cross-bridge formation between actin and myosin 
B)  Release of calcium from the sarcoplasmic reticulum 
C)  Activation of the NM receptor within the neuromuscular junction 
D)  Release of neurotransmitter (ACh) from the somatic motor neuron 
A)  Cross-bridge formation between actin and myosin 
B)  Release of calcium from the sarcoplasmic reticulum 
C)  Activation of the NM receptor within the neuromuscular junction 
D)  Release of neurotransmitter (ACh) from the somatic motor neuron

Question 6

The supinator and pronator muscles

Accepted Answer

A)  have their origin on the sternum and clavicle. 
B)  act synergistically with the sternocleidomastoid muscles. 
C)  are located in the lower extremities. 
D)  change the position of the hand. 
A)  have their origin on the sternum and clavicle. 
B)  act synergistically with the sternocleidomastoid muscles. 
C)  are located in the lower extremities. 
D)  change the position of the hand.

Question 7

The calf muscle (gastrocnemius)attaches to the calcaneus by the

Accepted Answer

A)  Achilles tendon. 
B)  soleus. 
C)  quadriceps ligament. 
D)  popliteal ligaments. 
A)  Achilles tendon. 
B)  soleus. 
C)  quadriceps ligament. 
D)  popliteal ligaments.

Question 8

A stronger force of muscle contraction develops when additional motor units are stimulated.This is called

Accepted Answer

A)  recruitment. 
B)  atrophy. 
C)  hypertrophy. 
D)  myasthenia. 
A)  recruitment. 
B)  atrophy. 
C)  hypertrophy. 
D)  myasthenia.

Question 9

Which of the following best describes a sphincter muscle?

Accepted Answer

A)  Oblique 
B)  Encircle 
C)  Straight 
D)  Aponeurosis 
A)  Oblique 
B)  Encircle 
C)  Straight 
D)  Aponeurosis

Question 10

Which muscles are located on the inner (medial)surface of the thigh and move the thigh toward the midline of the body?

Accepted Answer

A)  Gastrocnemius 
B)  Quadriceps femoris 
C)  Adductors 
D)  Sartorius 
A)  Gastrocnemius 
B)  Quadriceps femoris 
C)  Adductors 
D)  Sartorius

Question 11

Which muscle attaches to the cranial aponeurosis and wrinkles the forehead?

Accepted Answer

A)  Frontalis 
B)  Buccinator 
C)  Orbicularis oculi 
D)  Platysma 
A)  Frontalis 
B)  Buccinator 
C)  Orbicularis oculi 
D)  Platysma

Question 12

Curare-induced muscle blockade at the NM receptors within the neuromuscular junction

Accepted Answer

A)  causes paralysis. 
B)  induces tetanus. 
C)  stimulates recruitment. 
D)  causes loss of sensation with no effect on motor activity (muscle contraction). 
A)  causes paralysis. 
B)  induces tetanus. 
C)  stimulates recruitment. 
D)  causes loss of sensation with no effect on motor activity (muscle contraction).

Question 13

The force of muscle contraction is most related to the

Accepted Answer

A)  amount of calcium that is stored within the sarcoplasmic reticulum. 
B)  amount of neurotransmitter released from the prejunctional vesicles. 
C)  numbers of cross-bridges formed between actin and myosin. 
D)  size of the somatic motor neuron. 
A)  amount of calcium that is stored within the sarcoplasmic reticulum. 
B)  amount of neurotransmitter released from the prejunctional vesicles. 
C)  numbers of cross-bridges formed between actin and myosin. 
D)  size of the somatic motor neuron.

Question 14

Which group of muscles is located on the posterior thigh?

Accepted Answer

A)  Rotator cuff muscles 
B)  Quadriceps femoris 
C)  Hamstrings 
D)  Muscles of mastication 
A)  Rotator cuff muscles 
B)  Quadriceps femoris 
C)  Hamstrings 
D)  Muscles of mastication

Question 15

What is the name of the cord of connective tissue that connects muscle to bone?

Accepted Answer

A)  Ligament 
B)  Tendon 
C)  Linea alba 
D)  Aponeurosis 
A)  Ligament 
B)  Tendon 
C)  Linea alba 
D)  Aponeurosis

Question 16

Which muscle is located on the posterior area of the body?

Accepted Answer

A)  Latissimus dorsi 
B)  Pectoralis major 
C)  Quadriceps femoris 
D)  Sternocleidomastoid 
A)  Latissimus dorsi 
B)  Pectoralis major 
C)  Quadriceps femoris 
D)  Sternocleidomastoid

Question 17

The flexor carpi radialis and the flexor carpi ulnaris

Accepted Answer

A)  flex the forearm at the elbow. 
B)  extend the forearm. 
C)  flex the hand at the wrist. 
D)  adduct the arm. 
A)  flex the forearm at the elbow. 
B)  extend the forearm. 
C)  flex the hand at the wrist. 
D)  adduct the arm.

Question 18

Which of the following "slide" in the sliding filament hypothesis?

Accepted Answer

A)  Calcium and ATP 
B)  Sarcoplasm and T tubules 
C)  Actin and myosin 
D)  Epimysium and perimysium 
A)  Calcium and ATP 
B)  Sarcoplasm and T tubules 
C)  Actin and myosin 
D)  Epimysium and perimysium

Question 19

The ___________________ inserts on the quadriceps ligament,causing extension of the leg at the knee.

Accepted Answer

A)  rectus femoris 
B)  semimembranosus 
C)  gastrocnemius 
D)  sartorius 
A)  rectus femoris 
B)  semimembranosus 
C)  gastrocnemius 
D)  sartorius

Question 20

Which of the following is least related to the rectus femoris?

Accepted Answer

A)  Quadriceps femoris 
B)  Anterior thigh 
C)  Flexion of thigh at hip 
D)  Forms the popliteal fossa 
A)  Quadriceps femoris 
B)  Anterior thigh 
C)  Flexion of thigh at hip 
D)  Forms the popliteal fossa

Exam 9: Muscular System

The brachialis and brachioradialis

Which group is incorrect?

Which of the following is least related to the platysma?

Actin is

With regard to skeletal muscle contraction,which event comes first?

The supinator and pronator muscles

The calf muscle (gastrocnemius)attaches to the calcaneus by the

A stronger force of muscle contraction develops when additional motor units are stimulated.This is called

Which of the following best describes a sphincter muscle?

Which muscles are located on the inner (medial)surface of the thigh and move the thigh toward the midline of the body?

Which muscle attaches to the cranial aponeurosis and wrinkles the forehead?

Curare-induced muscle blockade at the NM receptors within the neuromuscular junction

The force of muscle contraction is most related to the

Which group of muscles is located on the posterior thigh?

What is the name of the cord of connective tissue that connects muscle to bone?

Which muscle is located on the posterior area of the body?

The flexor carpi radialis and the flexor carpi ulnaris

Which of the following "slide" in the sliding filament hypothesis?

The ___________________ inserts on the quadriceps ligament,causing extension of the leg at the knee.

Which of the following is least related to the rectus femoris?

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Anatomy of the Heart

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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