1. Some Hormones are derived from tyrosine, example --------------------. A. ADH
B. steroids
C. Insulin
D. Melatonin
E. All of the above
2. The hypothalamus controls the secretion of the adenohypophysis by -----------
A. Secretion of releasing and inhibiting factors into a tiny portal system.
B. Indirect osmotic control.
C. Direct neural stimulation.
D. Gap synaptic junctions.
E. Altering ion concentrations and pH in the anterior pituitary.
3. All of the followings are correct about Atrial natriuretic factor, except ------------------.
A. It is secreted by stretch receptors in the atria
B. It inhibits ADH secretion
C. It increases urine volume
D. It reduces blood pressure E. It decreases GFR
4. Hypothalamus releases ________________ hormone, which stimulate the Pituitary gland to release ____________ hormone. This will stimulate thyroid gland to release its__________.
A. Thyrotrophic releasing hormone, Thyroid-stimulating hormone, Thyroid hormones
B. Adrenocorticotropic, Corticotropin releasing, corticosteroids
C. Thyroid-stimulating hormone, Thyrotrophic releasing hormone, , Thyroid hormones
D. Corticotropin releasing, adrenocorticotropic, corticosteroids
E. Thyroid-stimulating hormone, Thyroid hormones, Thyrotrophic releasing hormone
5. Compared to the endocrine system, the signal of the nervous system is ------------.
A. very private
B. less private
C. very fast
D. Only A and C are correct
E. Only B and C are correct
6. When a single hormone acts on different types of receptors at the same cell it is ---
A. Autocrine effect
B. Divergent or convergent effect
C. Synergetic effect
D. Neuroendocrine effect
E. Paracrine effect
7. All of the followings are incorrect regarding the permissive effect, except ----------.
A. It is when Growth hormone induces the development in the presence of thyroid hormones
B. It is when the effect of two hormones working together is greater than individual effect
C. It is when Thyroid hormones induce development in the presence of growth hormone
D. It is when Thyroid hormones and growth hormone both promote protein synthesis during development
E. It is when the Thyroid hormone is needed for catecholamines to have their effect
8. Almost all neurons have -------------------------------. A. Schwann cells where the cell receives stimuli B. Dendrites where cells process stimuli C. Axons where cells transmit stimuli D. All of the above are correct E. Only B and C are correct
9. All of the followings are incorrect about the Graded Potential, except ------------------------- A. It spreads Electrotonically B. It is amplified by distance C. It is inversely proportional to the duration and magnitude of stimulus D. It is regenerative E. it is generated at the axon hillock
10. In multiple sclerosis where the Schwann cells are degenerated and damaged, --------------- A. There will be no graded potential. B. There will be a slower propagation of action potential C. There will be loss of the myelin sheath D. All of the above are correct E. Only B and C are correct
11. Metabotropic receptors are ---------------------. A. Intra cellular proteins B. Have ligand binding sites C. Stimulate intracellular signaling D. All of the above are correct E. Only B and C are correct
12. All of the followings are incorrect about conformers, except -------------------.
A. They maintain internal stability as external conditions change
B. They control internal conditions at environmental extremes
C. They use a positive feedback mechanism to maintain their internal environment consistent with the external environment
D. They have a physiological range to be maintained
E. They might me regulators on some of their physiological processes
14. One of the followings best describes peripheral proteins, -----------------.
A. Their Non-polar domains contain amino acids with hydrophilic side chains buried in the lipid bilayer
B. They serve as passive transport pores and channels as well as active-transport pumps
C. They attach to one side of the lipid bilayer
D. Their non-polar domains project into aqueous media
E. All of the above are correct
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