front 1 The amplification of the signal from a water-soluble hormone is achieved through an increase in _______. plasma membrane receptors phosphodiesterase in the cytoplasm cAMP in the cytoplasm adenylate cyclase in the plasma membrane water-soluble hormone in the blood | back 1 cAMP in the cytoplasm |
front 2 Water-soluble hormones affect target cells by binding to __________. adenylate cyclase cAMP cytoplasmic receptors protein kinases plasma membrane receptors | back 2 plasma membrane receptors |
front 3 How do endocrine hormones reach their target cells? Select the best answer. Hormones travel through the lymphatic system to target cells. Hormones are released at synapses adjacent to target cells. Hormones are transported through the blood stream to target cells. Hormones are produced by endocrine cells that are adjacent to target cells. Ducts transport hormones directly to target cells. | back 3 Hormones are transported through the blood stream to target cells. |
front 4 What is the role of activated protein kinases? Select the best answer. Convert ATP to cAMP by phosphorylation. Phosphorylate ADP to ATP. Activate adenylate cyclase. Phosphorylate proteins. Degrade cAMP to AMP. | back 4 Phosphorylate proteins. |
front 5 Cyclic AMP is degraded by __________. AMP protein kinase phosphodiesterase adenylate cyclase G proteins | back 5 phosphodiesterase |
front 6 Which of the following hormones has intracellular receptors? epinephrine cortisol insulin | back 6 cortisol |
front 7 What is the mechanism of action of lipid-soluble hormones? increasing protein kinases activation of genes, which increases protein synthesis in the cell phosphorylation of intracellular proteins | back 7 activation of genes, which increases protein synthesis in the cell |
front 8 After a lipid-soluble hormone is bound to its intracellular receptor, what does the hormone complex do? phosphorylates a protein activates a protein kinase directly alters protein synthesis at the ribosome acts as a transcription factor and binds to DNA, activating a gene | back 8 acts as a transcription factor and binds to DNA, activating a gene |
front 9 Which hormone’s receptor is always bound to DNA, even when the receptor is empty? thyroid hormone insulin cortisol | back 9 thyroid hormone |
front 10 What keeps intracellular receptors from binding to DNA before a hormone binds to the receptor? transcription factors chaperone proteins (chaperonins) Receptors can’t enter the nucleus until the hormone is bound to it. | back 10 chaperone proteins (chaperonins) |
front 11 Art-based Question Both high blood glucose levels and low blood glucose levels are stimuli that trigger specific responses by the body. These responses cause blood glucose levels to return to their set point. In this activity, you will explore how this happens. To review how the body regulates blood sugar levels, watch this BioFlix animation: Homeostasis: Regulating Blood Sugar. Part A - Regulating blood sugar. This diagram shows how the body keeps blood glucose at a normal level.Drag each label to the appropriate location on the diagram. | back 11 A: Pancreas releases insulin B: Body cells takes up more glucose C: Liver takes up glucose and stores it as glycogen D: Blood glucose decreases to normal E: Pancreas releases glucagon F: Liver breaks down glycogen and releases glucose to the blood G: Blood glucose returns to normal |
front 12 Up-regulation involves the loss of receptors and prevents the target cells from overreacting to persistently high hormone levels. True False | back 12 False |
front 13 Which of the following occurs in situations where more than one hormone produces the same effects at the target cell and their combined effects are amplified? synergism antagonism summation permissiveness | back 13 synergism |
front 14 Hypocalcemia could be caused by the ______. apoptosis of parathyroid cells failure of osteoclasts to respond to PTH (parathyroid hormone/parathormone) malfunction of the parathormone receptors in kidney tubule cells All of the listed responses are correct. | back 14 All of the listed responses are correct. |
front 15 Art-based Question What hormone released into the blood (shown by letter D) by the posterior pituitary inhibits or prevents urine formation? oxytocin cortisol antidiuretic hormone (ADH) thyroid-stimulating hormone (TSH) | back 15 antidiuretic hormone (ADH) |
front 16 Art-based Question Where are the hormones oxytocin and antidiuretic hormone (ADH) stored? A B C D | back 16 C |
front 17 What is the name for the type of hormone, secreted by the pituitary that regulates other endocrine organs? somatotropins growth hormones somatostatins tropins | back 17 tropins |
front 18 Which of the following hormones stimulates an increase in basal metabolic rate as a tropic hormone? thyroid-stimulating hormone adrenocorticotropic hormone prolactin follicle-stimulating hormone | back 18 thyroid-stimulating hormone |
front 19 Which hormone aids in water resorption? thyroid hormone adrenocorticotropic hormone parathyroid hormone antidiuretic hormone | back 19 antidiuretic hormone |
front 20 What tropic hormone stimulates cortisol from the adrenal gland? thyroid stimulating hormone (TSH) adrenocorticotropic hormone (ACTH) growth hormone (GH) luteinizing hormone (LH) and follicle stimulating hormone (FSH) | back 20 adrenocorticotropic hormone (ACTH) |
front 21 What is the function of the ventral hypothalamic neurons? control secretion of thyroid stimulating hormone (TSH) control secretion of antidiuretic hormone (ADH) control secretion of thyroid hormones control secretion of oxytocin | back 21 control secretion of thyroid stimulating hormone (TSH) |
front 22 Insulin-like growth factors (IGFs) are intermediary hormones stimulated by which of the following hormones? GH (growth hormone) oxytocin thyroid hormones prolactin (PRL) | back 22 GH (growth hormone) |
front 23 Which of the following hormones is regulated by a neuroendocrine (“letdown”) reflex? oxytocin antidiuretic hormone (ADH) cortisol | back 23 oxytocin |
front 24 Where is antidiuretic hormone (ADH), also known as vasopressin, synthesized? posterior pituitary anterior pituitary hypothalamus kidney | back 24 hypothalamus |
front 25 What is the most important regulatory factor controlling the circulating levels of thyroid hormone? thyrotropin-releasing hormone (TRH) a circadian rhythm of release thyroid-stimulating hormone (TSH) negative feedback | back 25 negative feedback |
front 26 Art-based Question What type of cell is shown at letter C? follicular cells parafollicular cells beta cells parathyroid cells | back 26 follicular cells |
front 27 Art-based Question What hormone is released by the cells pictured in letter D? calcitonin parathyroid hormone (PTH) glucocorticoids thyroid hormones | back 27 calcitonin |
front 28 Which of the following glands increases blood calcium levels? pituitary adrenal thyroid parathyroid | back 28 parathyroid |
front 29 Art-based Question What hormone, indicated by letter B, is released by the anterior pituitary to target the adrenal cortex when we are under stress? atrial natriuretic peptide (ANP) adrenocorticotropic hormone (ACTH) corticotropin-releasing hormone (CRH) angiotensin II | back 29 adrenocorticotropic hormone (ACTH) |
front 30 Art-based Question Which of these conditions would promote aldosterone release from the adrenal glands? A drop in blood pressure is sensed in the kidney. The body becomes parasympathetically activated. An increase in blood pressure is sensed in the heart. Blood potassium levels fall. | back 30 A drop in blood pressure is sensed in the kidney. |
front 31 Art-based Question Which letter represents the hormone that promotes a decrease in blood pressure and a loss of sodium and water in urine? A B C D | back 31 D |
front 32 Which of the following pairs correctly matches the adrenal gland zone, or area, with the class of hormones it produces? zona reticularis: aldosterone medulla: glucocorticoids zona glomerulosa: mineralocorticoids zona fasciculata: catecholemines | back 32 zona glomerulosa: mineralocorticoids |
front 33 Art-based Question Which of the following best describes the hypoglycemic effect of insulin? Insulin allows entry of glucose into most body cells. Insulin encourages release of glucose into the blood by liver cells. Insulin encourages synthesis of glucose from lactic acid and noncarbohydrate molecules. Insulin encourages catabolism of glycogen into glucose. | back 33 Insulin allows entry of glucose into most body cells. |
front 34 Which of the following brain structures would cause central diabetes insipidus if it were damaged? hypothalamus cerebellum cerebrum pons | back 34 hypothalamus |