Skeletal muscles produce movement by pulling on __________, which attach to bones
a. tendons
b. ligaments
c. cross bridges
d. articulations
e. sarcomeres
A
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Under times of great stress or shock, which of the following neurotransmitters interferes with the perception of pain?
A) endocannabinoids B) GABA C) catecholamines D) enkaphalins E) calcium ions
Which of the following describes most
accurately the expression "recombinant DNA"?
a. DNA molecule cloned from a given organism b. DNA molecule that contains genetic information from more than one organism c. DNA molecule that is moved from one tube to another in a laboratory d. DNA molecule isolated from a specific organism e. DNA molecule that has been used in a laboratory for experimental purposes
All of the following pertain to cephalosporins, except
A. many are administered by injection, not orally. B. they have a beta-lactam ring. C. newer generations have activity against gram-negative bacteria. D. they have greater resistance to beta-lactamases. E. they are are synthetic drugs.
Which of the following statements regarding the urinary system is true?
A) Bowman's capsule envelops the glomerulus. B) Most glomeruli are located in the renal medulla. C) The urinary bladder receives ammonia for excretion. D) The urethra is responsible for transporting urea from the kidney to the urinary bladder.