A loose gel ground substance with a high density of collagen fibers is characteristic of:
a. loose connective tissue
b. hyaline cartilage
c. dense connective tissue
d. fibrocartilage
Answer: c. dense connective tissue
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You are riding your bicycle over a very bumpy road, reading a street sign far ahead of you. Which sensory inputs are NOT required to accomplish this task?
A) Proprioceptors B) Visual inputs C) Inner ear D) All of the above are required.
Isovolumetric contraction ________
A) refers to the short period during ventricular systole when the ventricles are completely closed chambers B) occurs immediately after the aortic and pulmonary semilunar valves close C) occurs while the atrioventricular (AV) valves are open D) occurs only in people with heart valve defects
A reflex occurs without conscious thought
Indicate whether the statement is true or false
Can a skeletal muscle contract without shortening? Why or why not?
A) No, because muscles contract only when the muscle tension exceeds the load. B) No, because muscles contract only when the muscle tension is less than the load. C) Yes, because muscles can still contract during an isometric contraction when the muscle tension is equal to the load. D) Yes, because muscles can still contract during an isotonic contraction when the tension is at a constant level. E) No, because muscles can only generate tension while shortening, never during lengthening.