21) The fact that a single defective protein causes cystic : 1200280.
21) The fact that a single defective protein causes cystic fibrosis, a multisystemic illness, proves that
A) all organisms are composed of cells.
B) all levels of organization within an organism are interdependent.
C) chemical molecules make up cells.
D) all cells are independent of each other.
E) congenital defects can be life threatening.
22) The production of another human organism is the function of which of the following systems?
A) skeletal
B) reproductive
C) respiratory
D) lymphoid
E) cardiovascular
23) Coordinating the activities of other organ systems in order to direct immediate responses to stimuli is characteristic of the
A) integumentary system.
B) endocrine system.
C) nervous system.
D) cardiovascular system.
E) None of these is correct.
24) The trachea and lungs are components of the
A) endocrine system.
B) digestive system.
C) respiratory system.
D) urinary system.
E) lymphoid system.
25) The pituitary and thyroid glands are components of the
A) endocrine system.
B) cardiovascular system.
C) respiratory system.
D) lymphoid system.
E) digestive system.
26) Gas exchange is a function of the
A) cardiovascular system.
B) lymphoid system.
C) respiratory system.
D) urinary system.
E) endocrine system.
27) Which structure(s) is/are a component of the digestive system?
A) pituitary gland
B) ligaments
C) urethra
D) arteries
E) liver
28) Covering, protection, and thermoregulation are functions of which organ system of the human body?
A) integumentary
B) muscular
C) skeletal
D) nervous
E) endocrine
29) The thymus is associated with which organ system?
A) nervous
B) lymphatic
C) digestive
D) urinary
E) endocrine
30) Which of the following is characteristic of the endocrine system?
A) It releases chemical messengers called neurotransmitters.
B) It produces a more rapid response to body changes than the nervous system.
C) It can produce effects that last for days or longer.
D) It can produce an effect that involves only one tissue at a time.
E) It is an important thermoregulatory system.
21) The fact that a single defective protein causes cystic : 1200280
