Physiology 1

Welcome to your Physiology 1 Quiz

This quiz has 60 multiple choice questions. Make sure to mark an answer for every question!
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1. Which of the following muscles are active during quiet normal inspiration?
2. Which of the following factors increases the total force in a muscle?
3. Which of the following hormones is a potent stimulator of lipolysis (release of free fatty acids)?
4. Suppose a person bikes 750m within 120 seconds. What is the main source of energy?
5. How many liters of extracellular fluid does a man who weighs 100 kilograms have?
6. Which of the following physiological changes is elicited by parasympathetic stimulation?
7. Considering diffusion of water soluble substances, which statement is true?
8. How much is the effective alveolar ventilation of a person when given:

  • The Tidal Volume is 500 ml

  • The Breath Frequency is 20 times per minute

9. The resting membrane potential:
10. In the case a person has a pneumothorax:
11. Which of the following is not true regarding steroid hormones?
12. According to the sliding filament mechanism of skeletal muscle contraction, during concentric contraction:
13. I. Cells that are placed in a isotonic fluid absorb H2O and swell.

II. Cells that are placed in an hypotonic fluid lose H2O and shrink.
14. A high myoglobin contents is found in:

15. What is true about muscle properties?
16. In a resting person who is sitting upright, the Ventilation Perfusion ratio is normally:
17. What is the reason that actin myosin filaments are pulled apart right after a contraction (start of relaxation of the muscle)? The filaments are pulled apart by:
18. When a muscle fiber is stimulated by a motor nerve, the muscle fiber will either contract maximally or it will not contract at all. This is referred to as:
19. Which of the following organs is ONLY innervated by the Sympathetic Nervous System?
20. Which of the following events that take place during a muscle contraction, need ATP?
21. In a muscle that is contracting:
22. Low oxidative capacity, high glycolytic capacity, fast contraction speed, and a low level of fatigue resistance are characteristics of:
23. The similarity between primary active transport and passive transport is that in both cases:
24. An eccentric muscle contraction is one in which:
25. Which of the following pressure differences causes a flow of air into the lungs during inspiration?
26. The smallest functional unit of a muscle is the:
27. During a contraction of a sarcomere:
28. What is the main effect on the dead space in the lungs in diseases whereby alveolar tissue is replaced by connective tissue (like in cystic fibrosis)?
29. Iodine shortage leads to the formation of goiter. The reason for the enlarged thyroid gland in this situation is:
30. Which of the following is the result of a low PCO2 and a high PO2  in the alveolar air within the lungs?
31. During the depolarisation phase of the action potential:
32. Production of cortisol from the adrenal cortex is stimulated by:
33. Fast glycolytic fibers (type II, white) have a fast contraction velocity (as compared to slow oxidative muscle fibers (type I, red) because fast glycolytic muscle fibers have:

34. Growth hormone:
35. Slow-twitch (ST) muscle fibers are also sometimes referred to as:
36. What is NOT true about the autonomic nervous system?
37. Which of the following is correct? Steroid hormones:
38. The thick filaments of a myofibril are composed mainly of:
39. In which of the following situation will the breathing centers in the medulla oblongata stop stimulating the inspiratory muscles?
40. In which way can the production of the hormone insuline be stimulated?
41. Which of the following is not an endocrine organ?
42. Alpha receptors are located in smooth muscle cells in the arteriolar wall. What is the consequence of stimulation of these alpha receptors and for which neurotransmitter are alpha receptors most sensitive?
43. Which of the following hormones is produced in the posterior pituitary and how is its production stimulated?
44. The secondary centers of the Parasympathetic Nervous system are found in: (1)_________and contain (2)___________ as a transmitter substance:

45. Which of the following is not secreted by the adrenal cortex?
46. Which of the following features is a difference between smooth muscle and skeletal muscle?

47. It is a given fact that the consequence of a spinal lesion is a fallout of the functions below the lesion. Which of the following functions falls out as a consequence of a lesion at the level of  L3 of the spinal cord?
48. From an isotonic twitch, the following features are known:

  • the latent period lasts 20 msec

  • the contraction time (crescente) lasts 10 msec

  • the relaxation time (decrescente) lasts 10 msec

What does the time between following action potentials need to be in order to change this twitch into an unfused tetanus?
49. Which of the following cell functions is anabolic?
50. Amine hormones are:
51. Which of the following is a feature of a small motor unit (as compared to a large motor unit)? Small motor units:
52. The specialized network of membranous tubules that stores calcium ions in a muscle fiber is the:
53. What is the maximum % of actin and myosin filaments that can be coupled under circumstance that a muscle has a maximal contraction?
54. Which of the following is an important function of ATP in skeletal muscle?
55. Filtration:
56. The connective tissue sheath that surrounds an individual skeletal muscle fiber is called the:
57. When you look at the structure of  skeletal muscles from large to small, what is the correct sequence?
58. What is a criterion for the usage of the CP or creatine phosphate system during exercise?
59. What is true about the autonomic nervous system?
60. Increasing the magnitude of the membrane potential from its resting level to a more negative value. This is the correct description of: