Question

Question 16

Question text

The bones in the skull have many different names but what are the boundaries of each bone? Where do they start and stop?

Select one:

A. The boundaries are indistinct and are simply vague generalized regions.

B. Boundaries for skull bones are seen only in the infant skull.

C. Bones of the skull are continuous but named for their specific markings.

D. Bones of the skull are separated by immobile joints called sutures.

Question 17

Question text

Curvatures of the spine serve the body by ________.

Select one:

A. providing space for soft organs in the various body cavities

B. giving additional springiness and flexibility to the spine which absorbs shock

C. limiting the flexibility of the spine and preventing hyperextension

D. applying greater pressure to the intervertebral disks preventing them from slipping

Question 18

Question text

Which of the following can be considered a function of the paranasal sinuses?

Select one:

A. Sinuses have rough patches that aid in muscle attachment.

B. The paranasal sinuses are passageways for nerves to pass through.

C. Sinuses are often referred to as vestigial, anatomical features with no know function.

D. Sinuses take away a minimal amount of strength from bones while reducing the weight of bones.

Question 19

Which of the following would be most associated with housing the special sense organs?

Select one:

A. the temporal bones

B. the bones of the inner ear

C. the cranial bones

D. hyoid bone

Question 20

Football players often sustain lateral blows to the extended knee. Which of the following is (are) damaged as a result?

Select one:

A. tibial collateral ligament, medial meniscus, and anterior cruciate ligament

B. arcuate popliteal and the posterior cruciate ligaments

C. suprapatellar ligament

D. oblique popliteal and extracapsular ligaments

Question 21

Lifting up a glass to take a drink involves the elbow joint. Which of the following correctly characterizes that joint?

Select one:

A. cartilaginous

B. biaxial

C. diarthrotic

D. pivot

Question 22

Question text

What is the primary function of wave summation?

Select one:

A. prevent muscle relaxation

B. increase muscle tension

C. prevent muscle fatigue

D. produce smooth, continuous muscle contraction

Question 23

The mechanism of contraction in smooth muscle is different from skeletal muscle in that ________.

Select one:

A. the site of calcium binding site differs

B. the trigger for contraction is a rise in intracellular calcium

C. actin and myosin interact by the sliding filament mechanism

D. ATP energizes the sliding process

Question 24

After nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stimulate contraction?

Select one:

A. acetylcholinesterase breaks apart the ACh

B. calcium ions returning to the terminal cisternae

C. the action potential stops going down the overloaded T tubules

D. the tropomyosin blocking the myosin once full contraction is achieved

Question 25

Curare is a poisonous plant extract. Curare molecules have a chemical structure like the neurotransmitter ACh. Curare can bind to the ACh receptor site on the chemically gated ion channels in the motor end plate. Even though curare will bind to the receptor site it will not open the ion channel and no ions will pass through. What do you think the symptoms of curare poisoning would look like?

Select one:

A. Muscles will respond too quickly and cause a severe tremor.

B. Smooth muscles will become stimulated causing quick movement of nutrients through the digestive system.

C. Curare will only affect cardiac muscle, causing fibrillations of the heart.

D. Curare will only affect muscles with ACh receptors, paralyzing them.

Question 26

Myasthenia gravis is a disease that is believed to be caused by autoimmune disorder, resulting in the loss of ACh receptors at the motor end plate of muscle fibers. Which of the following is likely to be a symptom of myasthenia gravis?

Select one:

A. seizures and uncontrollable muscle movement

B. dehydration with headache

C. coma and loss of voluntary muscle movement

D. weakness of muscle

Answer 1

16 .D . Bones of skull are seperated by immobile joints called suture

17 .B . giving additional springiness and flexibility to spine which absorb shock

18.D. sinus take away minimal amount of strength from bone while reducing the weight of bone

19.A . temporal bone

20 .A . tibial collateral ligament , medail meniscus , anterior cruciate ligament

21.C , diarthrotic joint

22.B. increase muscle tension

23.A, the site of calcium binding site differ ., calmoduline is the site in smooth muscle

24 .A. acetycholinesterase break apart the acetylcholine

25.D. curare will affect only muscle having acetycholine receptor , paralyze them

26 .D, weakness of muscle