A&P 1 Practical 3 Quizzes

what muscle is highlighted?

extensor hallucis longus

all skeletal muscles are always voluntary

false

what muscle is highlighted?

orbicularis oculi

what muscle is highlighted?

rectus abdominis

what muscle is highlighted?

biceps brachii

what muscle is highlighted?

rectus femoris

The external oblique muscle is _____________ to the transverse abdominus muscle.

superficial

The vastus intermedius is _________ to the rectus femoris

deep

The pectoralis minor is __________ to the pectoralis major

deep

erica is blinking what muscle close the eye lid

orbicularis oculi

Which of the following are muscles of mastication (chewing food)? mentalis
masseter. orbicularis oris. temporalis

masseter. temporalis

Smiling involves a lot of muscles, and these muscles can be different from person to person. Select all of the muscles that may be involved in smiling. Focus on the mouth area.
zygomaticus major. risorius. masseter. depressor anguli oris. temporalis. zygomaticus minor

zygmoticus major and minor. risorius

Which of the following muscles is named based on its shape?
deltoid. biceps femoris. levator labii superioris. rectus abdominus

deltoid

Which of the following muscles is named based on its direction?
semitendinosous. transverse abdominus. trapezius. deltoid

transverse abdominus

The sternocleidomastoid muscle interacts with which bones?

sternum. clavicle. mastoid process

The term 'rectus' means

straight muscles

The functions of the muscular system include:

movement of the body. production of body heat. respiration. communications. constriction of organs and vessels. constriction of the heart. maintenance of posture

The perimysium, endomysium and epimysium are made of

connective tissue

Another name for the post-synaptic membrane in the neuromuscular junction is the

end plate

Erica smiles with the help of muscles that pull her lips laterally. What muscles are responsible for the smile?

zygomaticus major and minor

what does G stand for?

rectus abdominis

what muscle is highlighted?

pectoralis major

Tendon is made up of skeletal muscle

false

Muscles can be named based on what?

size. Orientation. Number of heads. Length. Shape. Origin and insertion. location. Action

Which of the following anatomical structures is least likely to have smooth muscle?
urinary bladder. rectus abdominus muscle. splenic artery. small intestine

rectus abdominus

Another name for a skeletal muscle cell is

muscle fiber

What part of the muscle cell is modified to become a sarcoplasmic reticulum?

smooth endoplasmic reticulum

What part of the cell is the sarcolemma?

cell membrane

Which abdominal muscle is the most superficial of the oblique muscles?

external abdominal oblique

Which type of muscle tissue possesses striations?

skeletal and cardiac

The part of the muscle that is fixed (does not move) is the

origin

what muscle is highlighted?

sternocleidomastoid

Select all the muscles that are adductor muscles adductor brevis
gracilis. adductor magnus. gastrocnemius. pectineus. semitendinosus. adductor longus

gracilis. adductor magnus. pectineus. adductor longus

The hamstrings originate from the

pelvic bone

what type of muscle in the image

skeletal

this type of muscle tissue could be found in the gastrocnemius muscle.

true

The lag phase before contraction known as a muscle twitch is caused mostly by

Delay at the neuromuscular junction synapse

sarcoplasmic reticulum

stores calcium

muscle fiber

skeletal muscle cell

sarcolemma

plasma membrane

motor unit

Motor neuron and all the muscle fibers it innervates

sarcomere

unit of a muscle cell

sarcoplasm

Cytoplasm of the muscle fiber

what muscle is highlighted?

infraspinatus

what muscle is highlighted?

triceps brachii

what muscle is highlighted?

latissimus dorsi

what muscle is highlighted?

rhomboid major

what muscle is highlighted?

gluteus maximus

what muscle is highlighted?

trapezius

Size

Adductor Magnus

number of heads

triceps femoris

insertion

Extensor hallucis longus

origin

Supraspinatus

location

temporalis

shape

deltoid

The threshold stimulus in neurons that activate skeletal muscles is generally

-55mV

What type of muscle tissue is this?

cardiac

During the process that leads to contraction, calcium is involved in

the release of vesicles from the presynaptic terminal.
biding to troponin and aiding the interactions between actin and myosin

A part of the sarcomere, the biggest protein in the world is

titin

Arrange these structures as they participate in excitation-contraction

Sarcolemma, T tubules, sarcoplasmic reticulum, Ca2+

Channels that open or close in response to changes in the electrical charge or voltage across the plasma membrane are called

voltage gated ion channels

Depolarization of the plasma membrane occurs when there is a rapid influx (inflow) of

sodium ions

Which of the following is true during the resting membrane potential?

Potassium is concentrated primarily inside the cell.