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A&P 1 Exam (Latest Update 2025) Questions and Answers (100 out of 100) Straighterline
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A&P 1 Exam (Latest Update 2025) Questions and Answers (100 out of 100) Straighterline
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My AccountBIO201_SL_V5 | Topic 13: The Endocrine System
Started on Wednesday, November 20, 2024, 12:47 AM
State Finished
Completed on Wednesday, November 20, 2024, 1:20 AM
Time taken 32 mins 27 secs
Grade 115.00 out of 125.00 (92%)
Question 1
Which part of the brain is responsible for regulating homeostasis, controlling the autonomic nervous
Correct system, and influencing the endocrine system?
5.00 points out
of 5.00 Select one:
a. Cerebellum
b. Thalamus
c. Hypothalamus
d. Medulla
Question 2
Which part of the white column is located between the two posterior horns of gray matter and are
Correct composed of axons of ascending tracts.
5.00 points out
of 5.00 Select one:
a. Lateral column
b. Posterior column
c. Ascending tract
d. Anterior column
Question 3
Which of the following statements about CSF formation is correct?
Correct
5.00 points out Select one:
of 5.00 a. Around 350 ml of CSF is produced per day. Around 350 ml of CSF is produced per day.
b. CSF is also produced in the region of the spinal cord.
c. CSF is produced by arachnoid granulations.
d. Around 500 ml of CSF is produced per day.
,Question 4
Which part of the body does the collateral ganglia control in the sympathetic nervous system?
Correct
5.00 points out a. Abdominal organs
of 5.00
b. Skeletal muscles
c. Brain
d. Spinal cord
Question 5
Which of the following statements regarding subcortical structures is incorrect?
Correct
5.00 points out a. Subcortical nuclei are located beneath the cerebral cortex, not above it.
of 5.00
b. Alzheimer’s disease is associated with a loss of neurons in the basal forebrain.
c. The hippocampus and amygdala are primarily involved in memory formation and emotional
responses.
d. The nuclei of the basal midbrain serve as the primary location for acetylcholine production.
Question 6
A patient experiences a traumatic head injury, leading to disruption of the protective coverings of
Correct the brain. As a result, the cerebrospinal fluid leaks, and the patient develops a postural headache,
5.00 points out nausea, and blurred vision. Which specific layer covering the brain is most likely compromised in
of 5.00 this scenario?
a. Epidural space
b. Dura mater
c. Pia mater
d. Arachnoid mater
Question 7
How are nerves classified?
Incorrect
0.00 points out a. By their location in the body
of 5.00
b. By the type of neurons they contain
c. By their length and thickness
d. By their connection to the CNS and spinal cord
,Question 8
In the autonomic nervous system, ____________ fibers release a molecule called acetylcholine
Correct (ACh) before the ganglia, while ____________ fibers in the parasympathetic system also release
5.00 points out ACh after the ganglia.
of 5.00
Select one:
a. Preganglionic; postganglionic
b. Parasympathetic; sympathetic
c. Postganglionic; preganglionic
d. Sympathetic; parasympathetic
Question 9
What is the most widely accepted explanation for the referred pain phenomenon?
Correct
5.00 points out Select one:
of 5.00 a. Referred pain occurs due to random activation of pain receptors in adjacent areas of the body.
b. Visceral sensory fibers project directly to the somatosensory cortex, leading to
misinterpretation of pain locations.
c. Visceral sensory fibers enter the spinal cord at the same level as somatosensory fibers
from the referred pain location.
d. Referred pain is caused by the spread of pain signals through the bloodstream to distant
areas of the body.
Question 10
Which of the following accurately describes the role of the hypothalamus in the pupillary light
Incorrect reflex?
0.00 points out
of 5.00 Select one:
a. The hypothalamus receives input from the optic nerve and regulates the parasympathetic and
sympathetic responses based on light levels hitting the retina.
b. The hypothalamus directly stimulates the circular fibers of the iris to contract and constrict
the pupil in response to bright light.
c. The hypothalamus communicates with the frontal cortex to interpret visual stimuli and initiate
the pupillary light reflex.
d. The hypothalamus plays no role in the pupillary light reflex; it is solely regulated by the
optic nerve.
Question 11
Which type of receptor responds to physical variations in the environment?
Correct
5.00 points out Select one:
of 5.00 a. Photoreceptor
b. Chemoreceptor
c. Thermoreceptor
d. Mechanoreceptor
, Question 12
Match the following nerve plexuses with their corresponding spinal nerve levels.
Correct
5.00 points out Nerve
Spinal Nerve Levels
of 5.00 Plexuses
1. Cervical
A. Spinal nerves C4 through T1
Plexus
2. Brachial
B. Spinal nerves C1 through C5
Plexus
3. Lumbar
C. All the lumbar spinal nerves
Plexus
4. Sacral D. Lower lumbar nerves L4 and L5 and sacral
Plexus nerves S1 to S4
Select one:
a. 1-B, 2-A, 3-C, 4-D
b. 1-A, 2-B, 3-C, 4-D
c. 1-B, 2-C, 3-A, 4-D
d. 1-B, 2-A, 3-D, 4-C
Question 13
Read the following statements regarding the anterior view of the ascending sensory pathways of the
Correct spinal cord, specifically the Spinothalamic Tract, and choose the option that correctly arranges these
5.00 points out steps:
of 5.00
I. The neurons in the dorsal root ganglion extend their axons to the dorsal horn, where they
synapse with the second neuron in their respective pathway.
II. The neurons in the thalamus then project their axons to the somatosensory cortex of the
postcentral gyrus of the cerebral cortex.
III. Axons from these second neurons decussate within the spinal cord, then they ascend to the
brain and enter the thalamus where each synapses with the third neuron in its respective pathway.
Select one:
a. II, III, I
b. I, II, III
c. III, II, I
d. I, III, II
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