Which type of joint is the hip joint?
A) hinge
B) ball-and-socket
C) saddle
D) ellipsoidal
B
Explanation:
A) The hip joint is not a hinge joint.
C) The hip joint is not a saddle joint.
D) The hip joint is not an ellipsoidal joint.
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In quiet breathing,
A) inspiration and expiration involve muscular contractions. B) inspiration is passive and expiration involves muscular contractions. C) inspiration involves muscular contractions and expiration is passive. D) inspiration and expiration are both passive processes. E) only the diaphragm is active during inhalation.
Multiple sclerosis (MS) is one of the better known diseases resulting from demyelination of axons (in MS, only CNS axons are affected). Some of the earliest symptoms of the disease are difficulty in focusing the eyes, such as in reading, and difficulty in maintaining balance, and frequently not being able to make adjustments in posture to avoid falling. How do these symptoms "fit" with what you
know about nerve impulses, myelin sheaths, and the location of gated ion channels in the membranes of axons? What will be an ideal response?
Every spinal segment is associated with a pair of ________ that contain the cell bodies of sensory neurons.
Fill in the blank(s) with the appropriate word(s).
Convergence refers to
A) dendrites from the same neuron touching each other. B) dendrites from neurons in different parts of the nervous system contacting the same neuron. C) a neuroglial cell that contacts many neurons. D) axons from neurons in different parts of the nervous system contacting the same neuron.