Physio 2: Week 1_Quiz 1 Intro to Endocrinology _ Markus _ REDUX

Which one of the following is characteristic of protein/peptide hormones? A. Protein Based hormones are derived from cholesterol. B. Protein based hormones take days to produce an effect in the body. C. The receptors of protein based hormones are located on the cell membrane. D. Protein Based hormones increase transcription and translation in the target cell.

C. The receptors of protein based hormones are located on the cell membrane.

Which statement below about hormones is true? A. Hormones are released into the blood circulation. B. All hormones affect all cells of the body. C. Hormones are enzymes that catalyse reactions. D. Hormones are released by neurons at synapses.

A. Hormones are released into the blood circulation.

Which hormones are soluble in blood? A. Hormones that are composed of amino acids. B. Steroid hormones. C. Hormones that are cholesterol based. D. All hormones of the body are insoluble in blood and require a transport protein.

A. Hormones that are composed of amino acids.

When comparing the endocrine and nervous systems, which one of the following statements is TRUE? A. In the endocrine system, the strength of signal (amplitude) is directly related to the amount of hormone released. B. Regarding frequency-modulated signals of the nervous system, a stronger signal is recognized by its greater amplitude. C. In the nervous system, the onset of effect will occur in within several minutes. D. The effects produced by neural transmission are much more prolonged than that of the endocrine system.

A. In the endocrine system, the strength of signal (amplitude) is directly related to the amount of hormone released.

Hormone levels are normally kept within a specific therapeutic range. What is the most common physiological process used to regulate secretion of hormones? A. Negative feedback inhibition B. Enzymatic destruction of hormones. C. Positive feed forward regulation D. Competitive inhibition

A. Negative feedback inhibition

Which one of the following statements regarding plasma protein and hormones is CORRECT? A. The binding of a steroid hormone to a plasma protein increases the half-life of the hormone. B. The binding of a steroid hormone to a plasma protein decreases its hormonal activity. C. Most protein-based hormones travel in the blood stream bound to plasma proteins. D. The binding of a steroid hormone to a plasma protein takes place within the nucleus of the target cell.

A. The binding of a steroid hormone to a plasma protein increases the half-life of the hormone.

Which of the following is NOT a function of hormones? A. The induction of nightmares regarding physiology in T3 students. B.Growth and DevelopmentC. Reproduction D.Maintenance of the internal environment (regulation of blood volume, electrolytes, body temperature, calcium homeostasis etc.)

A. The induction of nightmares regarding physiology in T3 students.

When a peptide (protein based) hormone binds to receptors on the surface of a cell... A. a second messenger soon appears in the cytoplasm. B. the cell membrane becomes depolarized. C. the hormone - receptor complex moves into the cytoplasm. D. the hormone is transported to the nucleus where it alters the activity of DNA.

A. a second messenger soon appears in the cytoplasm.

After a steroid hormone binds to its receptor to form an active complex,... A. gene transcription is initiated. B. the cell membrane becomes depolarized. C. protein kinases are activated. D. the cell membrane becomes depolarized.

A. gene transcription is initiated.

If a hormone level becomes dramatically deficient in the body, the number of target-cell receptors may increase. This is known as: A. up regulation. B. a paracrine response. C. positive feedback. D. receptor inhibition.

A. up regulation.