Changes in the central nervous system that accompany aging include all of the following except
A) reduction in brain size and weight.
B) decrease in the number of neurons.
C) decreased blood flow to the brain.
D) changes in synaptic organization in the brain.
E) increased memory storage.
E
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The first blood vessels to branch from the aorta are the ________ arteries
A) pulmonary B) coronary C) circumflex D) carotid E) subclavian
Tuna and the fastest sharks (such as the mako) have __________ caudal fins
A) Homocercal B) Holocercal C) Heterocercal D) Mesocercal Fill in the blank with the correct answer.
The heart's pacemaker is the ________.
atrioventricular bundle Purkinje fibers atrioventricular node sinoatrial node
Sally has elevated levels of blood calcium. What chemical would you expect to find in high levels in response to this condition?
A. sex hormones B. parathyroid hormone C. growth hormone D. calcitonin E. vitamin D