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MEDSCI 142 EXAM QUESTIONS AND CORRECT ANSWERS

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MEDSCI 142 EXAM QUESTIONS AND CORRECT ANSWERS...

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  • October 9, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • medsci 142
  • medsci 142 exam
  • MEDSCI 142
  • MEDSCI 142
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MEDSCI 142 EXAM QUESTIONS AND CORRECT ANSWERS



The cerebral hemispheres are connected internally by the: - ANSWER corpus callosum



The main motor area of cerebral cortex lies in the: - ANSWER precentral gyrus



The lower motor neurons are found in the: - ANSWER ventral horn of the spinal cord



The primary somatosensory cortex is situated in the: - ANSWER parietal Lobe



The factor most affecting the rate of impulse conduction is the: - ANSWER presence or
absence of a myelin sheath



The cell bodies of first-order neurons in the posterior column-medial lemniscus pathway
to the cortex are located in the: - ANSWER posterior root ganglia of spinal nerves



The medial lemniscus is a projection tract of second-order neurons extending from the: -
ANSWER medulla to the thalamus



What symptoms results from a lesion of the primary motor cortex on the left side of the
brain? - ANSWER a spastic paralysis on the right side of the body



The compound that most often acts as a second messenger is: - ANSWER cyclic AMP



What is the neurotransmitter is used by pre-ganglionic nerve axons of both the
sympathetic and parasympathetic divisions of the autonomic nervous system? -
ANSWER Acetylcholine

,What connects the hypothalamus with the pituitary gland? - ANSWER the infundibulum



You would expect to experience the effects of: - ANSWER Upregulated parasympathetic
system activation



Releasing and inhibiting hormones originate from the: - ANSWER hypothalamus to
govern the anterior pituitary



The specific action of a water-soluble hormone on a target cell is determined by the: -
ANSWER specific protein kinase activated.



If a steroid hormone interacts with its target cell receptor, it does the following:
-ANSWER turns nuclear DNA on or off in order to activate specific genes.



The anterior pituitary gland: -ANSWER synthesizes at least 7 different hormones
important in the regulation of all aspects of homeostasis



During your rat dissection lab, which one of the following structures was the most
vascular?



a) The spleen

b) The pancreas

c) The Stomach

d) The liver -ANSWER The spleen



Name three organs from which the duodenum receives material. - ANS stomach, liver &
pancreas



During a rat dissection, a student encounters a tubular part of the gut. The student is
surprised to find that most of this tubular portion lies outside the abdominal cavity and
she is informed that its chief function is transport. Little absorption or secretion occurs

,there. Is the following statement true "it does not receive secretions from either the liver
or the pancreas"? - ANSWER TRUE



Which of the following does NOT form part of the digestive system?



a) the oesophagus

b) the spleen

c) the pancreas

d) the stomach - ANSWER spleen



Which of the following structures are contained within the frontal lobe of the brain?



a) Wernicke's area

b) Supramarginal gyrus

c) Broca's area

d) Calcarine sulcus - ANSWER Broca's area



First-order sensory neurons carry impulses from: - ANSWER a receptor to the CNS



The posterior (dorsal) root ganglion is: - ANSWER NOT THE the roots of spinal nerves
hanging inferiorly from the inferior end of the spinal cord in the vertebral column.



Cell bodies of motor neurons to skeletal muscles are found in the: - ANSWER anterior
gray horns



Third-order sensory neurons in the posterior column-medial lemniscus pathway stretch
from the: - ANSWER thalamus to the somatosensory area of the cerebral cortex



Paracrines are: - ANSWER local hormones that act on neighboring cells

, Lipid soluble hormones: - ANSWER must dissociate from a transporter protein in order
to leave the blood stream



A person with a chronically activated sympathetic autonomic nervous system pathway
is likely to have all of the following EXCEPT: - ANSWER elevated rate of salivation



Identify the organ that is NOT associated with the peritoneum in the Rat. - ANSWER gall
bladder



For food to be able to pass along the GI tract, the correct order of the organs is: -
ANSWER oesophagus - stomach - small intestine - caecum - colon - rectum - anus



Which of the following structures are you most likely to find in the rat? - ANSWER
adrenal gland



A person with a chronically activated sympathetic autonomic nervous system pathway
is likely to have all of the following EXCEPT: - ANSWER elevated rate of salivation



The cell bodies of upper motor neurons are: - ANSWER NOT THE located in the ventral
horn of the spinal cord OR located in the basal ganglia



The part of a spinal nerve that contains only efferent fibres is the: - ANSWER ventral
root.



Fine control of body motor coordination and balance is a function of the: - ANSWER
cerebellum



The medial lemniscus: - ANSWER is located in the brainstem.



If a stroke caused damage to the posterior third of the inferior frontal gyrus in the left

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