25 Jun What does it mean when the sarcolemma is depolarized
Question
4 of 25
What does it mean when the sarcolemma is depolarized?
A reverse of the electrical conditions of the membrane due to an influx of potassium
A reverse of the electrical conditions of the membrane due to an influx of acetylcholine
A reverse of the electrical conditions of the membrane due to an influx of sodium ions
A stabilization of the electrical conditions of the membrane due to an influx of calcium ions
A stabilization of the electrical conditions of the membrane due to a loss of sodium
Question
5 of 25
What is the role of acetylcholine in muscle contraction?
Acetylcholine attaches to the sarcolemma and makes the membrane more permeable.
Acetylcholine attaches to the myosin and makes the myofilaments attach.
Acetylcholine travels deep into the tubules and causes calcium to be released from the sarcoplasmic reticulum.
Acetylcholine initiates the energy needed for the sliding filaments to move.
Acetylcholine triggers the release of calcium into the synaptic gap.
Question
6 of 25
What chemical triggers the sliding of the muscle filaments?
Sodium
ATP
Potassium
Acetylcholine
Calcium
Question
7 of 25
Which of the following describes complete tetanus of a muscle?
A single stimulus is delivered, and the muscle contacts and relaxes.
Stimuli are delivered frequently, and the contraction force increases with little relaxation.
A smooth continuous contraction without any evidence of relaxation because stimulus is delivered rapidly and continually.
A weak stimulus is delivered, and the muscle does not contract.
A strong stimulus is delivered, but the muscle is fatigued and will not contract.
Question
8 of 25
What is the slowest pathway for ATP regeneration?
Direct phosphorylation
Aerobic respiration
Lactic acid production
Glycolysis
Anaerobic respiration
Question
9 of 25
Which of the following describes isometric muscle exercise?
Muscle size and strength will increase because the muscle fibers are making more myofilaments.
Muscle endurance increases because the circulation to the muscles is enhanced.
Muscle size increases because the muscle fibers produce more mitochondria.
Muscle flexibility is increased because the muscle continually shortens.
Muscles do not shorten during contraction so the muscles do not increase in size.
Question
10 of 25
Which of the following correctly describes one of the five golden rules of skeletal muscle activity?
The bulk of the muscle usually lies distal to the joint crossed.
Most skeletal muscles cross at least one joint.
Skeletal muscles can only push, not pull.
During contraction, a skeletal muscle origin moves toward the insertion.
Skeletal muscles have no more than one attachment point.
Question
11 of 25
When a person shakes the head to indicate “no,” what type of movement is being demonstrated?
Flexion
Opposition
Rotation
Adduction
Circumduction
Question
12 of 25
What type of movement is indicated when a limb is moved toward the midline of the body?
Flexion
Opposition
Abduction
Adduction
Circumduction
Question
13 of 25
Which of the following describes muscle insertion?
It is usually proximal to the origin.
It does not move when the muscle contracts.
It does not attach to a bone or skin.
It moves away from the origin when a muscle contracts.
It moves toward the origin when a muscle contracts.
Question
14 of 25
When the knee is bent, the hamstring group of muscles contract. What is the insertion of this muscle group?
Femur
Ischium
Tibia
Tarsals
Sacrum
Question
15 of 25
What is the significant role of synergists and fixators?
They are responsible for the primary movement desired.
They are responsible for reversing the movement desired.
They are antagonists of each other.
They stabilize a bone and prevent excessive unwanted movement.
They are responsible for the stretch of a primary mover.
Question
16 of 25
What criterion is used in naming the deltoid muscle?
Muscle shape
Muscle location
Action of the muscle
Number of origins
Direction of the muscle fibers
Question
17 of 25
What is the fascicle arrangement of the orbicularis oris muscle?
Pennate
Parallel
Fusiform
Convergent
Circular
Question
18 of 25
What muscle compresses the cheek to hold food between the teeth during chewing?
Masseter
Temporalis
Buccinator
Platysma
Zygomatic
Question
19 of 25
What muscle is responsible for the flexion of the head?
Platysma
Sternocleidomastoid
Masseter
Temporalis
Trapezius
Question
20 of 25
What muscle is a prime mover of arm abduction and also a favored site for administering intramuscular injections?
Triceps brachii
Biceps brachii
Deltoid
Gluteus medius
Gluteus maximus
Question
21 of 25
What is the function of the latissimus dorsi muscle?
Depression and adduction of the scapula
Extension and adduction of the humerus
Extension of the neck
Extension of the back
Lateral flexion of the spine
Question
22 of 25
Which muscle is responsible for knee flexion?
Gluteus medius
Gluteus maximus
Tibialis anterior
Soleus
Biceps femoris
Question
23 of 25
What muscle is the prime mover for plantar flexion?
Gastrocnemius
Sartorius
Rectus femoris
Tibialis anterior
Biceps femoris
Question
24 of 25
Which of the following describes muscle fatigue?
The muscle loses tone and becomes flaccid.
The muscle is unable to contract due to oxygen deficiency.
The muscle has atrophied as a result of not being used.
The muscle is contracting but not shortening.
The muscle has become paralyzed due to nerve damage.
Question
25 of 25
Which of the following describes muscular dystrophy?
Muscle weakness due to an autoimmune disease
Muscle weakness due to disuse and lack of calcium blood levels
Muscle weakness due to atrophy and increased fat and connective tissue deposits
Uncontrolled muscle activity due to abnormal neural conduction
Uncontrolled muscle activity due to increased calcium blood levels
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Order Now” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.