A substance that will increase the rate of a chemical reaction without being permanently changed is called a/an ________.
A. solute
B. oxidator
C. catalyst
D. reducing agent
Answer: C
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What are considered the effectors of humoral immunity?
A. Helper T-lymphocytes B. Cytotoxic T-lymphocytes C. Antibodies D. Macrophages E. Natural killer cells
Which of the following changes in banding pattern occur during muscle contraction?
a. the A band gets shorter. b. the I band gets shorter. c. the H zone gets shorter. d. both the I band and the H zone get shorter. e. all of these answers.
A muscle that runs down the arm, and inserts on the olecranon process of the ulna, would cause
A. flexion of the elbow. B. extension of the elbow. C. extension of the fingers. D. abduction of the arm. E. flexion of the fingers.
Color blindness is more common in men; it is a(n)
A. Y-linked dominant disorder. B. X-linked recessive disorder. C. sex-linked co-dominant disorder. D. endocrine-related disorder. E. autosomal dominant disorder.