Steroid hormones exert their action by.
entering the nucleus of a cell and initiating or altering the expression of a gene
finding an appropriate cell receptor and initiating cAMP activity
stimulating the synthesis of a glycogen
increasing blood pressure
The Correct Answer is A
a) Entering the nucleus of a cell and initiating or altering the expression of a gene: Steroid hormones (e.g., cortisol, estrogen) are lipid-soluble and can pass through the cell membrane to bind intracellular receptors, influencing gene transcription.
b) Finding an appropriate cell receptor and initiating cAMP activity: This describes non-steroid hormones (e.g., catecholamines, peptide hormones) using second messenger systems, not steroids.
c) Stimulating the synthesis of glycogen: This is an effect of some hormones (e.g., insulin), but it’s not how steroid hormones act.
d) Increasing blood pressure: While some steroid hormones (like aldosterone) may affect blood pressure, this is not their mechanism of action.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a) Hypophysectomized rat treated with thyroxine: Thyroxine suppresses TSH; no goiter forms.
b) Hypophysectomized rat treated with TSH: TSH directly stimulates thyroid tissue growth, leading to goiter even if the pituitary is absent.
c) Thyroidectomized rat treated with PTU: No thyroid = no goiter can form, and PTU inhibits thyroid hormone production, not causing growth in absent tissue.
d) Thyroidectomized rat treated with TSH: Without thyroid tissue, TSH has no target to stimulate.
Correct Answer is C
Explanation
a) Triiodothyronine (T3) and thyroxine (T4) production continues uninterrupted.
Iodinated thyroglobulin is essential for producing T3 and T4.
b) Excess triiodothyronine (T3) and thyroxine (T4) hormones are produced.
A lack of iodinated thyroglobulin leads to decreased production.
c) Less triiodothyronine (T3) and thyroxine (T4) hormones are produced.
Without iodinated thyroglobulin, the thyroid cannot synthesize sufficient T3 and T4, leading to hypothyroidism.
d) Less thyroid-stimulating hormone (TSH) is released.
TSH levels would actually increase due to lack of negative feedback from low T3 and T4 levels.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.