Question

Steroid Hormone
A) Work via second messenger
B) Trigger rapid,short term response in cell
C) Alter the activity of genes
D) Initiate open channels in plasma membrane

Answer 1

Hint:A steroid hormone is a steroid that behaves like a hormone. Steroid hormones can be divided into two classes:-corticosteroids (usually developed in the adrenal cortex, thus corticosteroids) and sex steroids (usually produced in gonads or placentas)

Complete answer:
>Steroid hormones are well known both physiologically and clinically as regulators of diverse biological reactions, including profound effects on cell metabolism , growth, and physiology.
>Steroid hormones are secreted along a concentration gradient from synthetic cells to circulating plasma and do not use a vesicular membrane fusion pathway.
>As a result, the circulating levels of androgens accurately represent the synthesis rate. Steroid hormones are lipophilic and are thus typically transported in plasma attached to serum binding proteins such as albumin-or sex hormone-binding globulin (SHBG).
>These binding proteins shield the steroid from degradation, which would otherwise limit its half-life, and also inhibit renal excretion. Only free, unbound steroids are biologically active, because once in the target tissue, steroid hormones are released from the binding protein and, due to their lipophilic nature, can easily reach the cells by diffusing through the plasma membrane.
>Within the cell, steroid hormones are bound to intracellular receptors.After entering into the cell,steroid hormones act as ligands and alter the gene transcription.

Thus the correct answer is Option(c)

Note:Steroid hormones help regulate metabolism, inflammation, immune function, salt and water balance, the growth of sexual characteristics and the ability to tolerate illness and injury. The word steroid identifies both hormones created by the body and artificially generated drugs that mimic the action of naturally occurring steroids.