Quiz 3 BIOL 235

Question 1

If the biceps brachii contracts, what will occur?

Answer 1

The insertion will be pulled toward the origin

Question 2

Which muscle is most involved in smiling?

Answer 2

Zygomaticus major

Question 3

Which muscles have an insertion on the xiphoid process?

Answer 3

1 and 3 (rectus abdominis, transversus abdominis)

Question 4

What muscle of the thorax is known as the ‘boxer’s muscle’?

Answer 4

Serratus anterior

Question 5

Which muscle abducts the arm and has an origin on the clavicle?

Answer 5

Deltoid

Question 6

Which statement is not true about the gluteus maximus?

Answer 6

Extensions of the torso occurs when one is bowing, like an actor after a performance

Question 7

Which muscle helps you cross your legs?

Answer 7

Sartorius

Question 8

In muscles of the limbs, where is the origin usually located?

Answer 8

Distal

Question 9

In muscles of the limbs, where is the insertion usually located?

Answer 9

Proximal

Question 10

True or False: The only muscles that are ever used in breathing are the diaphragm and the external intercostal muscles.

Answer 10

False

Question 11

The autonomic nervous system is part of the _____.

Answer 11

PNS

Question 12

Which nerve potential travels the longest distance in a typical sensation?

Answer 12

Nerve action potential

Question 13

Why is Na+/K+-ATPase considered to be an electrogenic pump?

Answer 13

It contributes to the negativity of the resting membrane potential

Question 14

What does a depolarizing graded potential do?

Answer 14

Makes the membrane less polarized

Question 15

How can the nervous system distinguish between a light touch and a heavier touch?

Answer 15

The frequency of impulses sent to sensory centers changes

Question 16

Which statement best describes the direction of signal transmission?

Answer 16

Signals go only from the presynaptic neuron to the postsynaptic neuron

Question 17

Serotonin is an example of a(n) _____________________ neurotransmitter.

Answer 17

Biogenic amine

Question 18

What type of neural circuit consists of a single presynaptic neuron synapsing with several postsynaptic neurons?

Answer 18

Diverging circuit

Question 19

True or False: During an action potential’s absolute refractory period, a second stimulus of sufficient strength will produce another action potential.

Answer 19

False

Question 20

True or False: Grey matter has its distinctive color due to myelination of axons.

Answer 20

False

Question 21

Where are the spinal meninges located?

Answer 21

3 only (covering the spinal cord)

Question 22

Where does the spinal cord end?

Answer 22

Conus medullaris

Question 23

A mixed spinal nerve has:

Answer 23

A posterior and anterior root

Question 24

Intercostal nerves originate primarily from which area of the spine?

Answer 24

Thoracic

Question 25

If the posterior root of the spinal cord were severed, what would be affected?

Answer 25

Nerve impulses from pain and stretch receptors would not reach the CNS

Question 26

Which of the following are sensory tracts?

Answer 26

Anterior spinothalamic and posterior columns

Question 27

What best describes reciprocal innervation?

Answer 27

Relaxation of antagonist at the same time of contraction of agonist

Question 28

True or False: The lumbar enlargement extends from L1 to L4 and contains nerves that travel to and from the lower limbs.

Answer 28

False

Question 29

True or False: The patellar reflex is an example of an autonomic reflex.

Answer 29

False

Question 30

Which statement is false in reference to the cranial meninges?

Answer 30

Have three layers of the dura mater

Question 31

Cerebral spinal fluid is produced in which structure(s)?

Answer 31

Choroid plexuses

Question 32

Which structure is the pons?

Answer 32

B

Question 33

Which statement about the cerebellum is true?

Answer 33

Its prime function is to 'fine tune' motor function

Question 34

What is a projection tract?

Answer 34

Consists of axons that conduct nerve impulses to or from the cerebrum

Question 35

Which cranial nerves control movements of the eyeball?

Answer 35

Oculomotor (III) nerve, trochlear (IV) nerve, and abducens (VI) nerve

Question 36

Facial movement is primarily controlled by _________ nerves, while sensation from the face is primarily determined by ___________ nerves.

Answer 36

Facial; trigeminal

Question 37

Damaging which cranial nerve would decrease gastrointestinal secretions?

Answer 37

Vagus

Question 38

True or False: The reticular activating system (RAS) is a part of the reticular formation.

Answer 38

True

Question 39

True or False: Hypothalamic axons extend to the pituitary gland and secrete hormones.

Answer 39

True

Question 40

Which of the following is true of the autonomic nervous system?

Answer 40

A and B are correct

Question 41

Why is the sympathetic division of the ANS called the thoracolumbar division?

Answer 41

Its preganglionic neurons' cell bodies are located in the gray matter of the thoracic and lumbar segments of the spinal cord

Question 42

Which organ is matched incorrectly with its sympathetic or parasympathetic ganglion?

Answer 42

Urinary bladder - superior mesenteric ganglion

Question 43

Which neurotransmitter does not bind to adrenergic receptors?

Answer 43

Acetylcholine

Question 44

______________ is the neurotransmitter used by the pathway shown in the diagram and it causes _______________.

Answer 44

Acetylcholine; depolarization

Question 45

What is the definition of autonomic tone?

Answer 45

The balance between sympathetic and parasympathetic activity

Question 46

Which sympathetic response is mismatched with its body part?

Answer 46

Liver - increased glycogen synthesis

Question 47

Which would be an example of a condition in the body not controlled by autonomic reflexes?

Answer 47

Tracking a bird flying by

Question 48

True or False: The primary difference between an autonomic reflex arc and a somatic reflex arc is that the former has two motor neurons connecting the CNS to an effector.

Answer 48

True

Question 49

True or False: The primary reason that the sympathetic division of the ANS produces immediate responses within the body is based on the concept of divergence.

Answer 49

True