Study "ALL HAP HARD", a flashcard deck on FORKSAI.
Which of the following best describes the primary difference in communication speed between the nervous and endocrine systems within the neuroendocrine system? A) Both systems transmit signals at a similar, rapid pace. B) The endocrine system provides rapid, localized communication, while the nervous system offers widespread, long-lasting effects. C) The nervous system allows rapid transmission, whereas the endocrine system relies on slower, widespread, and longer-lasting regulatory actions. D) The nervous system is responsible for long-term regulation, and the endocrine system handles immediate responses.
C) The nervous system allows rapid transmission, whereas the endocrine system relies on slower, widespread, and longer-lasting regulatory actions. The source material explicitly states, 'Nervous system- generally allows rapid transmission of communication' and 'Endocrine system -relies on the production and release of hormones from glands and their transport via the bloodstream. Suited to widespread, longer lasting regulatory actions.'
A patient presents with symptoms including decreased metabolic rate, weight gain, reduced heart rate, and lower body temperature. Which of the following endocrine gland disorders is most likely causing these symptoms? A) Acromegaly B) Cushing disease C) Hypothyroidism D) Gigantism
C) Hypothyroidism. The source notes state that Hypothyroidism is characterized by 'low T3 causing decreased metabolism, heart rate, blood pressure, muscle tone, body temperature, weight gain'.
Which class of hormones cannot directly enter target cells and instead interacts with receptors on the cell surface? A) Steroids B) Amino acid derivatives C) Proteins and polypeptides D) Lipids
C) Proteins and polypeptides. The source material specifies that 'Proteins and polypeptides= cannot enter the cells, instead they interact with receptors on the cell surface'.
A patient is diagnosed with a condition where their cells exhibit a decreased number of specific hormone receptors, leading to reduced cellular sensitivity to that hormone. What is this phenomenon called? A) Up-regulation B) Hormone-receptor complex formation C) Down-regulation D) Specificity enhancement
C) Down-regulation. The source defines down-regulation as a 'decrease in receptor numbers, reducing sensitivity (e.g. insulin resistance)'.
Which of the following functions is primarily controlled by the neuroendocrine system? A) Regulation of white blood cell production B) Transmission of signals between the brain and internal organs C) Fine and gross motor movements D) Regulation of calcium levels by increasing bone resorption
C) Fine and gross motor movements. The source lists 'Fine and gross motor movements' as one of the controls of the neuroendocrine system, alongside language, affective behaviour, cognitive behaviour, and sociosexual functions.
Which hormone is primarily responsible for regulating water conservation by the kidneys, and what conditions would increase its secretion? A) Oxytocin; high plasma volume and low plasma osmolarity. B) ADH (vasopressin); high plasma osmolarity and low plasma volume. C) Prolactin; increased protein synthesis and long bone growth. D) TSH; decreased metabolic rate and weight gain.
B) ADH (vasopressin); high plasma osmolarity and low plasma volume. The source states that the posterior pituitary secretes ADH (vasopressin), which 'regulates water conservation increased by: high plasma osmolarity (e.g. dehydration) and low plasma volume(e.g. blood loss)'.
A non-cancerous tumor producing prolactin is identified in a patient. This specific pituitary disorder is known as: A) Acromegaly B) Gigantism C) Prolactinoma D) Cushing disease
C) Prolactinoma. The source lists 'Prolactinoma= non-cancerous tumour producing prolactin' as a pituitary disorder.
Which of the following is a primary function of the thyroid gland? A) Regulating calcium levels by increasing bone resorption. B) Maintaining homeostasis and controlling appetite. C) Raising metabolic rate and increasing protein synthesis. D) Promoting skeletal muscle growth and reproductive function.
C) Raising metabolic rate and increasing protein synthesis. The source explicitly states that functions of the thyroid gland include 'Raising metabolic rate' and 'Increasing protein synthesis'.
Hormone specificity, which ensures that a hormone only affects certain cells, is dependent on which of the following? A) The rate of hormone secretion into the bloodstream. B) The presence of specific receptors on target cells. C) The quantity of transport proteins in the plasma. D) The rate of hormone metabolism or excretion.
B) The presence of specific receptors on target cells. The source states, 'Hormone specificity depends on the presence of specific receptors on target cells, forming an hormone-receptor complex'.
A patient exhibits symptoms of excess growth hormone (GH) in adulthood, leading to enlargement of facial features, hands, and feet. This condition is known as: A) Gigantism B) Dwarfism C) Acromegaly D) Growth hormone deficiency
C) Acromegaly. The source defines 'Acromegaly= excess GH in adulthood' as a pituitary disorder.