The cerebral aqueduct connects
A. the lateral ventricles to the third ventricle.
B. the two lateral ventricles.
C. the third ventricle to the fourth ventricle.
D. the fourth ventricle to the subarachnoid space.
Answer: C
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Answer the following statements true (T) or false (F)
1. There is good evidence that regular, lifelong, high-intensity exercise can reduce the loss of motor units typically associated with aging. 2. Delayed onset muscle soreness is associated more with isometric training than with concentric or eccentric training. 3. Hamstring strains are slow to heal and have a high incidence of reoccurrence. 4. Although muscle fibers are typically categorized by three types, there is actually a continuum of fiber characteristics. 5. Electrochemical delay in children is longer than in adults.
Pacemaker activity that establishes the rhythmicity of breathing resides in the
a. lung tissue. b. respiratory muscles. c. Pre-Botzinger complex d. phrenic nerve. e. reciprocal relationship between the inspiratory and expiratory neurons of the ventral respiratory group.
Extension (or straightening) of the elbow stops when the proximal end of the ulna engages the ________
A) medial epicondyle of the humerus B) olecranon fossa of the humerus C) coronoid fossa of the humerus D) trochlea of the humerus
Describe the role of regulatory neurons
A) Regulatory neurons act as part of the defense system to protect the presynaptic neurons from pathogens. B) Regulatory neurons block presynaptic neurons from drugs and other chemicals in the blood. C) Regulatory neurons assist in the repair of injured neurons. D) Regulatory neurons speed the propagation of action potentials between presynaptic neurons and postsynaptic neurons. E) Regulatory neurons facilitate or inhibit the activities of presynaptic neurons by affecting the membrane of the cell body or by altering the sensitivity of axon terminals.