More than half the heat is lost from the body indoors through the process of
A) radiation.
B) conduction.
C) convection.
D) evaporation.
E) concentration.
A
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A graded change in membrane potential within a sensory receptor cell is always called a(n)
A) action potential. B) receptor potential. C) hyperpolarization. D) depolarization.
The following is a list of structures of the male reproductive tract. 1. ductus deferens 2. urethra 3. ejaculatory duct 4. epididymis The correct order in which spermatozoa pass through these structures from the testes to the penis is
A) 1, 3, 4, 2. B) 4, 3, 1, 2. C) 4, 1, 2, 3. D) 4, 1, 3, 2. E) 1, 4, 3, 2.
Which structure develops from an evagination of the ectoderm in the roof of the embryonic oral cavity?
A. Thyroid gland B. Posterior pituitary C. Anterior pituitary D. Pancreas E. Adrenal glands
Which of the following substances are stored in the structure of adult bones for use by other tissues in the body?
a) calcium b) phosphorous c) triglycerides d) iron e) More than one of these substances is stored in bone.