Blood Ca2+ deficiency stimulates ________ secretion, which leads to ________.
A) calcitonin; more urinary phosphate reabsorption
B) parathyroid hormone; increased osteoclast activity
C) growth hormone; increased osteoblast activity
D) calcitriol; more urinary phosphate excretion
E) thyroid hormone; less urinary calcium excretion
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Question 2) The protein that acts as a calcium receptor in skeletal muscle is ________.
A) titin
B) dystrophin
C) tropomyosin
D) F actin
E) troponin
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Question 3) Which of the following is not true about the anatomy of the urinary system?
A) The kidneys are retroperitoneal.
B) The kidneys are at equal heights within the pelvic cavity.
C) The urethra of males is longer than the urethra of females.
D) The right kidney is located more inferiorly than the left kidney.
E) The ureters connect the kidneys to the urinary bladder.
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Question 4) Which of the following is not considered an embryonic membrane?
A) Placenta B) Chorion C) Allantois D) Amnion E) Yolk sac
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Question 5) The ________ performs the work of the heart.
A) epicardium
B) myocardium
C) endocardium
D) fibrous skeleton
E) pericardial cavity
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Question 6) All sympathetic postganglionic adrenergic fibers secrete adrenaline.
Indicate whether the statement is true or false
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Question 7) The plasma membrane is permeable to ________, but impermeable to ________.
A) proteins; nutrients
B) nutrients; wastes
C) nutrients; proteins
D) wastes; nutrients
E) phosphates; wastes
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Question 8) Which of the following does not raise the total metabolic rate?
A) Pregnancy
B) Fever
C) Anxiety
D) Starvation
E) Eating a big meal
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Question 9) As you are lifting a box, someone places extra weight on top of it. For your muscle to continue contracting and lifting the box, the muscle must ________.
A) shift from isometric to isotonic contraction
B) reduce its wave summation
C) shift from slow-twitch to fast-twitch mode
D) lower its threshold
E) recruit more muscle fibers
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Question 10) The ________ is not an organ of the urinary system.
A) liver
B) ureter
C) kidney
D) urethra
E) urinary bladder
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