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BIOS 252 Exam 2 with verified solutions.
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BIOS 252 Exam 2 with verified solutions.
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BIOS 252 Exam 2 withverified solutions
layers of meninges (superficial to deep)
dura mater, arachnoid mater, pia mater
dura mater
presses closely against cranial bones, no epidural space, not
directly attached to bone except around foramen magnum, sella
turcica, crista gallis, and sutures of the skull.
arachnoid mater
transparent membrane over brain surface, subarachnoid space
separates it from pia mater below
pia mater
very thin membrane
not usually visible without microscope
follows all contours of the brain
follows arteries as they penetrate into cerebrum
blood brain barrier
layer around brain prevents things from entering and leaving, made
up of astrocytes.
2 areas of the brain
wernicke: Speech - formulates phrases and transmits speech to
broca (left hemisphere)
Broca: Comprehends speech
Regions of the spine
, Cervical: nerves located between ribs and skull (upper limbs)
Lumbar: L1 Spinal nerves gives sensation to groin helps...lower back
- lower limbs
Thoracic: Nerves in top of chest, arm, hand (controls lungs,
diaphragm, rib cage, breathing)
cranial nerves
Sends electrical signals between your brain, face, neck and torso.
Helps you taste, smell, hear and feel sensations, make facial
expressions, blink your eyes and move your tongue
(12 pairs of nerves)
sensory vs motor
sensory (afferent) carry signals from receptors to the spinal cord
and brain
motor (efferent) carry signals from the central nervous system to
effector organs
Lobes of the brain & responsibilities
Frontal: reasoning, planning, parts of speech, movement, emotions,
problem-solving
Parietal: movement, orientation, recognition, perception of stimuli
Occipital: visual processing
Temporal: perception and recognition of auditory stimuli, memory,
and speech
What does the hypothalamus regulate
temperature
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