A&P 1 LAB - EXAM 3

location

direction of muscle fibers

relative size

number of origins

location of origin and insertion

shape

action

List two of the seven criteria listed in your lab manuel that are used to name muscles

acetylcholine

What neurotransmitter do motor neurons use to stimulate muscle cells?

skeletal

Identify the type of muscle tissue shown

Z-disc

Identify the indicated region of the sarcomere

I-band

Identify the indicated region of the sarcomere

terminal cistern of sarcoplasmic reticulum

Identify the indicated structure

muscle fiber

Identify the indicated structure

t-tubule

A portion of the plasma membrane of a skeletal muscle indents into the cytoplasm and surrounds the bundles of muscle filaments. This structure is called:

synaptic cleft

The space between a neuron axon terminal and the target cell is called:

triad

The structure formed by two termianl cisternae of the sarcoplasmic reticulum and a transverse tubule is called:

synergists

What do we call muscles that aid the action of other muscles by reducing undesirable of unnecessary movement?

location of origin and insertion

Which of the seven criteria used for naming a muscle applies to the sternocleidomastoid muscle?

shape

Which of the seven criteria used for naming a muscle applies to the deltoid muscle?

latent period

The three phases of a muscle twitch are the contraction period, the relaxation period, and the:

sarcoplasmic reticulum

From what cellular organelle is calcium released during the latent period of a muscle twitch?

recruitment

By steadily increasing the number of motor units that are activated, we produce a steady increase in the force produced by a muscle. This process is called:

passive

What type of force is produced by the elastic recoil of a stretched muscle?

extension of the thigh at the hip

Name one action of the semitendinosus muscle

flexion of the thigh at the hip

Name one action of the rectus femoris muscle

extension of the lower leg at the knee

Name one action of the vastus medialis muscle

extension of the forearm at the elbow

Name one action of the triceps brachii muscle

skin and muscle at the corner of the mouth

Name one insertion of the zygomaticus minor muscle

greater tubercle of the humerus

Name one inserton of the infraspinatus muscle

tibial tuberosity

Name one insertion of the vastus medialis muscle

coronoid process of the ulna

Name one insertion of the brachilais muscle

ischial tuberosity

Name one origin of the semitendinosus muscle

ramus and body of the pubis

Name one origin of the gracilis muscle

sternum

Name one origin of the pectoralis major muscle

medial epicondyle of the humerus

Name one origin of the flexor carpi radialis muscle

external oblique abdominal

Idenitfy the indicated muscle

linea alba

Identify the indicated structure

epicranius frontal belly

frontalis

Identify the indicated muscle

mentalis

Identify the indicated muscle

orbicularis oculi

Identify the indicated muscle

occipitalis

epicranius occipital belly

Idenitfy the indicated muscle

stylohyoid

Identify the indicated muscle

mylohyoid

Identify the indicated muscle

external intercostals

Identify the indicated muscle

internal intercostals

Idenitfy the indicated muscle

pectoralis minor

Identify the indicated muscle

brachialis

Idenitfy the indicated muscle

teres minor

Idenitfy the indicated muscle

brachioradialis

Identify the indicated muscle

extensor digitorum

Identify the indicated muscle

extensor carpi ulnaris

Idenitfy the indicated muscle

flexor carpi radialis

Identify the indicated muscle

tensor fascia latae

Identify the indicated muscle

vastus lateralis

Identify the indicated muscle

soleus

Identify the indicated muscle

semitendinosus

Idenitfy the indicated muscle

cardiac

Identify the type of muscle tissue shown

myosin

The indicated region of the sarcomere is composed of what protein?

thick filaments

Identify the indicated region of the sarcomere

perimysium

Identify the indicated layer of connective tissue

myofilaments

Chains of proteins within the muscle cells are called:

motor unit

A single motor neuron, along with all of the muscle fibers that it innervates is called:

triad

Idenitfy the indicated structure

moveable site of attachment

Define "insertion" as it applies to skeletal muscles

location

Which of the seven criteria used for naming a muscle applies to the tibilais anterior muscle?

action and relative size

Which of the seven criteria used for naming a muscle applies to the adductor magnus muscle?

fatigue

If we require a muscle to contract until it starts to run out of ATP, what do we call the state of the muscle at that point?

latent period

What do we call the period of time between the application of a stimulus to a muscle and the first observable response or movement of the muscle?

tetany

tetanus

What phenomenon is considered an extreme form of wave summation in which a steady, sustained contraction is achieved?

closes the eyelid

Name one action of the orbicularis oculi muscle

flexion and rotation of the vertebral column

Name one action of the rectus abdominis muscle

extension of the thigh at the hip

Name one action of the semimembranosus muscle

calcaneus

Name one insertion of the gastrocnemius muscle

angle and ramus of the mandible

Name one insertion of the masseter muscle

lateral epicondyle of the humerus

Name one origin of the extensor digitorum muscle

occipital bone

Name one origin of the trapezius muscle

zygomatic bone

Name one origin of the zygomaticus minor muscle

acromion and spinous process of scapula

Name one origin of the deltoid muscle

internal oblique abdominal

Idenitfy the indicated muscle

rectus abdominis

Identify the indicated muscle

levator labii superioris

Identify the indicated muscle

corrugator supercilli

Idenitfy the indicated muscle

sternohyoid

Identify the indicated muscle

pectoralis major

Identify the indicated muscle

deltoid

Identify the indicated muscle

biceps brachii

Identify the indicated muscle

teres major

Identify the indicated muscle

palmaris longus

Identify the indicated muscle

sartorius

Identify the indicated structure

adductor magnus

Identify the indicated muscle

peroneus

fibularis longus

Identify the indicated muscle

smooth

Identify the type of muscle tissue shown

H-zone

Identify the indicated region of the sarcomere

thin filaments

Identify the indicated region of the sarcomere

epimysium

Identify the indicated layer of connective tissue

perimysium

The connective tissue sheath that forms around a bundle of skeletal muscle cells is called:

immovable site of attachment

Define "origin" as it applies to skeletal muscles

location of origin and insertion

Which of the seven criteria used for naming a muscle applies to the brachioradialis muscle?

active

What type of force is produced by the physiological contraction of a muscle rather than by elastic recoil?

contraction period

The three phases of a muscle twitch are the latent period, the relaxation period, and the:

isometric

If we place a muscle under more load than it can lift and stimulate it, what type of contraction will we produce?

flexion of the forearm at the elbow

Name one action of the biceps brachii muscle

elevation of the lateral corners of the mouth

Name one action of the zygomaticus major muscle

extension of the fingers at the metacarpal and phalangeal joints

Name one action of the extensor digitorum muscle

abduction of the arm at the shoulder

Name one action of the deltoid muscle

medial aspect of upper tibial shaft

Name one insertion of the semitendinosus muscle