1. What controls movement in response to environmental changes in animals?
B) Nervous system
2. Which cells are responsible for detecting sensory information?
B) Nerve cells
3. What are gustatory receptors responsible for detecting?
D) Taste
4. How do nerve impulses travel between neurons?
B) Via electrical impulses and chemicals
5. What is a synapse?
C) A gap between neurons
6. Where are reflex arcs mainly formed?
C) In the spinal cord
7. Which part of the brain is associated with complex thinking?
C) Cerebrum
8. What is the advantage of reflex actions?
B) Quick response to stimuli
9. What term describes a sudden action in response to a stimulus?
B) Reflex action
10. Which of the following is NOT a sense organ?
C) Heart
11. What triggers the conversion of sensory input into an electrical impulse?
A) Receptors
12. Why might reflex arcs have evolved in animals?
B) For efficient quick responses
13. What happens at the neuromuscular junction?
C) Nerve impulses are transferred to muscles
14. Where are olfactory receptors found?
B) Nose
15. Which part of a neuron receives information?
B) Dendrite
16. What might occur if reflex arcs did not exist in humans?
B) Slower responses to stimuli
17. What role do sense organs play in control and coordination?
C) Detect environmental changes
18. Which structure in neurons is responsible for transmitting impulses to the next neuron or cell?
A) Axon
19. What is the nature of the response of a reflex action?
C) Automatic and involuntary
20. What sequence does a reflex arc follow?
C) Receptor, spinal cord, muscle
21. How do gustatory and olfactory receptors complement each other?
B) Both detect chemical stimuli related to taste and smell
22. Which part of a neuron converts electrical impulses into chemical signals?
C) Axon terminal
23. What happens if you block your nose while tasting something?
B) Taste is diminished
24. Why is rapid response to stimuli important for survival?
B) It prevents potential harm
25. What is the role of the spinal cord in reflex actions?
B) Directly connects receptors with effectors
26. Why might reflex actions be more efficient than deliberate actions in some cases?
C) Reflex actions bypass complex processing
27. What is released at a synapse to propagate an impulse?
C) Neurotransmitters
28. Which body part is primarily responsible for processing sensory signals?
C) Brain
29. Which statement correctly describes the function of neurons?
C) They conduct impulses
30. What is it called when an organism reacts to an external stimulus without conscious thought?
B) Reflex action
31. Where do nerve cells primarily interact with muscle cells?
B) Neuromuscular junction
32. Which element is critical for the generation of electrical impulses in neurons?
B) Sodium
33. What would likely happen if synapses were not functioning properly?
B) Disruption in nerve impulse transmission
34. What primary advantage do reflex actions provide to an organism?
C) Immediate response to potential threats
35. Which part of the neuron transmits signals away from the cell body?
B) Axon
36. What do olfactory and gustatory receptors detect, respectively?
A) Taste and smell
37. How are nerve impulses primarily transmitted across a synapse?
B) By neurotransmitters
38. Which sensory organ is associated with auditory reception?
C) Ear
39. What term refers to the automatic adjustment to maintain balance?
C) Reflex
40. Which nerves transmit information from receptors to the central nervous system?
B) Sensory nerves
41. What is the role of the brain in reflex actions?
C) It relays sensory information
42. Which component is essential for the coordination of voluntary actions?
C) Brain
43. Which factor decreases the speed of nerve impulse transmission?
C) Neurotransmitter deficiency
44. Which part of the neuron is involved in receiving signals from other cells?
C) Dendrite
45. What is the primary purpose of reflex actions?
C) To provide quick protective responses
46. Which mechanism ensures fast response without involving the brain?
C) Reflex arc
47. Where are neurotransmitters released in the neuron?
B) Axon terminal
48. What essential function does the nervous system perform?
B) Controls and coordinates actions
49. What could lead to dysfunction in impulse transmission along neurons?
B) Damaged myelin sheath
50. Which type of reaction occurs automatically without involving conscious thought?
B) Reflexive
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