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MEDSCI 142 EXAM QUESTIONS AND CORRECT ANSWERS
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MEDSCI 142 EXAM QUESTIONS AND CORRECT ANSWERSThe 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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