Question

70) The chromafin cells of the adrenal medulla possess what type of receptor that makes them responsive to the ACh released by preganglionic sympathetic neurons? a) muscarinic receptors b) nicotinic receptors c) B1-adrenergic d) 2-adrenergic e) B3-adrenergic 71) Which of the following statements describes a common response of an autonomic effector during the "fight-or-flight" response? a) Gastric motility and secretory activity increases. b) Blood vessels serving skeletal muscles constrict. c) Adipose tissues store away triglycerides for later use. d) The pupils of the eyes dilate. e) Blood vessels serving the kidneys and digestive organs dilate. 72) Which of the following are a group of lipid-soluble hormones derived from cholesterol? a) Steroids b) Thyroid hormones c) Nitric oxide d) Amine hormones e) Peptide hormones 73) What controls hormone release from the anterior pituitary gland? a) Muscle contraction b) The peripheral nerve c) Hormones released from the hypothalamus d) Action potentials from the thalamus e) Chemical changes in the cerebrospinal fluid (CSF) system 74) Which of the following anterior pituitary hormones stimulates general body growth? a) Growth hormone b) Prolactin c) Thyrotropin d) Luteinizing hormone e) Adrenocorticotropic hormone 75) Which of the following anterior pituitary hormones stimulates milk production? a) Luteinizing hormone

Answer 1

70) - b) the chromaffin cells of adrenal medulla are like neurons only that secrete catecholamines,we know that at the first neuron that exits the spinal cord secretes Acetylcholine so the receptors are cholinergic ,because this is a neuronal synapse (like an automatic ganglion ) so these will be nicotinic receptors.

71). d) - In emergency conditions ,the sympathetic system diverts the blood from all non important systems like GIT and Renal to more important parts like brain and skeletal muscles.

Pupils dilate so that more light enters the eyes and visibility is good.

Adipose tissue is broken down to help in energy generation.

72). a) - Steroids

73). c) though Anterior pituitary is the master gland but it is controlled by the hypothalamus (the commander gland).

74). a) - As the name suggests it is growth hormone that does this work.