BIOLOGY 211 Exam 4 Questions & Answers
QUESTION 1
1. The structure found between the posterior rootlets and the posterior root ganglion is called
... [Show More] the .
2. anterior horn
anterior root of a spinal nerve
posterior root of a spinal nerve posterior horn
spinal nerve
QUESTION 2
1. Each portion of the spinal cord, from which a spinal nerve emerges, is called a "segment" of the cord.
True
False
QUESTION 3
1. Which of the following is contained within gray matter?
2. Glial cells, axons of motor neurons, and Schwann cells
Glial cells and myelinated fibers
Neurosomas, dendrites, and proximal parts of axons of neurons
The distal part of axons of lower order motor neurons Glial cells only
QUESTION 4
1. Which of the following sensory functions involves neurons in the posterior root ganglion?
2. Smell
Heari ng Touc h Taste Vision
QUESTION 5
1. The middle layer of the meninges is called the .
2. gray matter
white matter dura mater arachnoid mater
pia mater
QUESTION 6
1. Nerve fibers are insulated from one another by .
2. perineuriu m endoneur ium fascicles epineurium blood vessels
QUESTION 7
1. Which of the following is not considered a region of the spinal cord?
2. Cervic al Thorac ic Lumba r Pelvic Sacral
QUESTION 8
1. Which of the following nerves originates in the lumbosacral plexus?
2. Axillary
Sciatic Phrenic Ilioinguin al Obturato r
QUESTION 9
1. Voluntary motor signals typically begin in an upper motor neuron in the thalamus.
True
False
QUESTION 10
1. Somatic reflexes are responses of skeletal, smooth, and cardiac muscles.
True
False
QUESTION 11
1. Motor commands are carried by from the brain along the spinal cord.
2. both anterior and posterior roots ascending tracts spinal nerves cranial nerves descending tracts
QUESTION 12
1. A ganglion is a swelling along a nerve containing the cell bodies of peripheral neurons.
True
False
QUESTION 13
1. The tendon reflex is the inhibition of a muscle's contraction that occurs when its tendon is excessively stretched.
True
False
QUESTION 14
1. Cerebrospinal fluid fills the space between the .
2. dural sheath and dura mater
dural sheath and vertebral bones
dura mater and arachnoid mater
arachnoid mater and
pia mater
dura mater and pia mater
QUESTION 15
1. A is a cordlike organ composed of numerous .
2. nerve fiber; nerves nerve fiber; axons
nerve; axons nerve fiber; neurosomas
nerve; neurosomas
QUESTION 16
1. Tendon organs are .
visceral receptors
propriocept
1. ors
2. pain receptors
nociceptors
QUESTION 17
Which of the following is not a property of reflexes? ses are very predictable.
esponses to sensory inputs.
Reflexes are quick responses of the nervous system.
Reflexes are not voluntary.
Reflexes do not require a stimulus.
QUESTION 18
1. In the patellar tendon reflex arc, the patellar ligament is stretched, which stretches the quadriceps femoris muscle of the thigh. This reflex will cause the quadriceps femoris to and the hamstrings to .
1. contract; relax
contract; con
1. tract relax; contract
relax; relax
QUESTION 19
Ascending signals in the spinal cord travel via gray matter, while descending signals travel via white matter.
True
False
QUESTION 20
1. Which one of the following best describes the order of a somatic reflex?
2. Somatic receptor → interneuron → afferent nerve fiber → efferent nerve fiber
→ skeletal muscle
Somatic receptor → efferent nerve fiber → interneuron → afferent nerve fiber
→ skeletal muscle
Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → skeletal muscle
Somatic receptor → efferent nerve fiber → afferent nerve fiber → interneuron
→ skeletal muscle
Somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber
→ smooth muscle
QUESTION 21
1. Reflex arcs that only use two neurons are called reflex arcs.
2. ipsilateral
contralater al polysynapti [Show Less]