Arrange the following events in the proper sequence:
1. Efferent neuron reaches threshold and fires an action potential.
2. Afferent neuron reaches threshold and fires an action potential.
3. Effector organ responds by performing output.
4. Integrating center reaches decision about response.
5. Sensory organ detects change in the environment.
A) 5, 3, 4, 2, 1
B) 5, 2, 4, 1, 3
C) 5, 1, 4, 2, 3
D) 2, 3, 5, 1, 4
E) 3, 1, 4, 2,
B) 5, 2, 4, 1, 3
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Which of the following is NOT a common characteristic of epithelial tissues?
a) Cells are tightly packed together. b) Large amount of extracellular matrix. c) Contains no blood vessels within tissue. d) Found on the exposed surfaces of the body. e) Line the inside of blood vessels.
Answer the following statement(s) true (T) or false (F)
1. Several muscles of facial expression are stimulated by the facial nerve. In other words, these muscles are innervated by the facial nerve. 2. Most athletic injuries can be prevented by conditioning, stretching, and warm-up exercise. 3. Injury to the deep fibular nerve would cause inability to extend one's toes. 4. As axon diameter increases, the conduction speed of an action potential decreases. 5. The nervous system employs exclusively electrical means to send messages, whereas the endocrine system communicates by means of chemical messengers.
Biomechanical analysis has revealed which of the following about high velocity pitchers compared to lower velocity pitchers?
A. they have greater internal rotation at the shoulder B. they have greater upright posture at release C. they have higher angular velocity of the pelvis and upper torso D. all of the above
The names of muscles associated with the thumb frequently include what term?
A) brevis B) longus C) minimi D) digitorum E) pollicis