Endocrinology and Nervous Coordination - One Line Questions

1. The 'all-or-none' principle in neurophysiology states that: — A neuron fires completely or not at all once a threshold is reached
2. Which of the following is a neurotransmitter involved in mood regulation, sleep, and appetite? — Serotonin
3. The adrenal cortex produces steroid hormones, including: — Cortisol and aldosterone
4. Which hormone promotes the reabsorption of water by the kidneys, thus regulating water balance? — Antidiuretic hormone (ADH)
5. The central nervous system consists of the: — Brain and spinal cord
6. The structure that connects the two cerebral hemispheres is the: — Corpus callosum
7. Which part of the nervous system is responsible for involuntary actions like digestion and heart rate? — Autonomic Nervous System (ANS)
8. The 'master control center' for the autonomic nervous system, regulating hunger, thirst, and body temperature, is the: — Hypothalamus
9. The 'limbic system', involved in emotions and memory, is primarily part of which nervous system component? — Cerebrum (specifically cortical and subcortical structures)
10. Which part of the brain is primarily responsible for coordination, balance, and posture? — Cerebellum
11. The 'pons' and 'medulla oblongata', vital centers for regulating breathing and heart rate, are part of the: — Brainstem
12. The 'fight or flight' response is primarily mediated by which hormone secreted by the adrenal medulla? — Adrenaline (Epinephrine)
13. Which hormone is produced by the adrenal medulla and increases heart rate, blood pressure, and glucose levels? — Adrenaline (Epinephrine)
14. The 'sympathetic nervous system' is part of the autonomic nervous system and prepares the body for action, often described as the 'fight or flight' response, leading to: — Increased heart rate, breathing rate, and blood flow to muscles
15. Which part of a neuron transmits electrical signals away from the cell body? — Axon
16. Which of the following is a hormone produced by the testes that promotes the development of male secondary sexual characteristics? — Testosterone
17. Hormones are chemical messengers produced by which type of glands? — Endocrine glands
18. The hormone that stimulates the release of eggs from the ovary and triggers ovulation is: — Luteinizing hormone (LH)
19. Which hormone is responsible for regulating blood sugar levels by promoting glucose uptake by cells? — Insulin
20. Diabetes mellitus is a condition characterized by high blood glucose levels, often due to insufficient production or utilization of: — Insulin
21. Which of the following is a function of the nervous system? — Coordination of bodily activities
22. Hypothyroidism, a condition of low thyroid hormone levels, can lead to: — Slowed metabolism and weight gain
23. The 'parasympathetic nervous system' is part of the autonomic nervous system and is often referred to as the 'rest and digest' system, responsible for: — Conserving energy and promoting digestion
24. Which hormone is produced by the pancreas and raises blood glucose levels? — Glucagon
25. Cushing's syndrome is caused by prolonged exposure to high levels of which hormone? — Cortisol
26. What is the basic structural and functional unit of the nervous system? — Neuron
27. The myelin sheath, which insulates axons and speeds up nerve impulse transmission, is produced by which cells? — Oligodendrocytes (in CNS) and Schwann cells (in PNS)
28. What is the chemical substance released at a synapse that transmits a nerve impulse? — Neurotransmitter
29. The 'blood-brain barrier' is a protective layer that regulates the passage of substances from the bloodstream into the brain, maintained by specialized cells called: — Astrocytes
30. Which hormone stimulates the production of milk in the mammary glands after childbirth? — Prolactin
31. Which gland produces thyroxine, a hormone that regulates metabolism? — Thyroid gland
32. Graves' disease, characterized by hyperthyroidism, is caused by an overproduction of which hormone? — Thyroxine
33. Which gland produces hormones that influence the development and maturation of T-lymphocytes, crucial for the immune system? — Thymus gland
34. Which endocrine gland is located in the neck, below the larynx? — Thyroid gland
35. The spinal cord's primary role in nervous coordination is: — Relaying sensory information to the brain and motor commands to the body
36. Which hormone stimulates uterine contractions during childbirth? — Oxytocin
37. What is the primary function of the endocrine system? — Secretion of hormones to regulate bodily functions
38. What is the main role of the somatic nervous system? — Controlling voluntary muscle movements
39. The 'action potential' refers to the: — Electrical impulse that travels along a neuron
40. Which type of neuron transmits signals from the central nervous system to muscles or glands? — Motor neuron
41. The hormone responsible for regulating the sleep-wake cycle is: — Melatonin
42. Which hormone is secreted by the pineal gland and regulates circadian rhythms? — Melatonin
43. Parkinson's disease is a neurological disorder characterized by a deficiency in which neurotransmitter? — Dopamine
44. The junction between two neurons where information is transmitted is called a: — Synapse
45. Which hormone is responsible for the development of secondary sexual characteristics in females? — Estrogen
46. A reflex arc is a neural pathway that controls a reflex action, typically involving: — A sensory neuron, interneuron (in most cases), and a motor neuron
47. Which gland is often referred to as the 'master gland' due to its control over other endocrine glands? — Pituitary gland
48. Which endocrine gland secretes hormones that regulate calcium and phosphate levels in the blood? — Parathyroid glands
49. Which endocrine gland secretes parathyroid hormone (PTH), essential for regulating calcium levels? — Parathyroid glands
50. Acromegaly, a condition of excessive growth in adulthood, is caused by overproduction of: — Growth hormone
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