Hormonal actions on cells can affect all of the following except
A) increase levels of cAMP.
B) decrease levels of calcium ions.
C) increase ATP production.
D) decrease gene transcription.
E) decrease hormone release through negative feedback.
Answer: B
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What is the function of ATP molecules in living cells?
A) They capture energy from the oxidation of fuels in their high-energy phosphate bonds, and the energy is used in various cell processes. B) They act as coenzymes so that fats can be synthesized. C) They form a genetic material. D) They are an integral part of the cell membrane, important in transporting water molecules.
Atrial natriuretic hormone
A. promotes the secretion of ADH. B. is secreted by the posterior pituitary. C. causes the formation of concentrated urine. D. is secreted when atrial blood pressure increases. E. is secreted when atrial blood pressure decreases.
Match the symptoms to the problem.
1. Ménière's disease 2. tinnitus 3. central hearing loss 4. sensorineural hearing loss 5. conductive hearing loss A. damage to the cerebral cortex B. degeneration of hair cells C. ringing in the ears D. dizziness and nausea E. problems with structures of the middle ear
Which cells present antigens in the thymus?
A. Natural killer cells B. B lymphocytes C. Cytotoxic T cells D. Epithelial cells E. Helper T cells