18 Questions
What is the main method of release for steroid hormones?
Simple diffusion
Which hormone has a longer half-life, indicating a slower turnover rate?
Melatonin
What is the cellular mechanism of action for steroid hormones?
Activating genomic effects through cytoplasmic or nuclear receptors
Which of the following hormones is NOT derived from tyrosine?
Cortisol
In simple endocrine reflexes, which part of the endocrine system acts as the sensor?
Endocrine cell
What is the function of the anterior pituitary gland?
Release six hormones of epithelial origin
What is the minimum requirement for a molecule to be considered a peptide?
One peptide bond
Which hormone type is derived from amine hormones and often modified from tryptophan or tyrosine?
Peptide hormones
What is the function of a preprohormone in the hormone synthesis process?
Requires signal sequence for release
How are peptide hormones transported in the body?
Through the bloodstream
Which cellular mechanism of action involves the activation of an enzyme (tyrosine kinase) on the cytoplasmic surface of a receptor?
Receptor-enzymes
Where are steroid hormones primarily derived from?
Cholesterol
What distinguishes hormones from other chemical signals used by cells to communicate?
They are secreted into the blood.
Which system is responsible for rapid responses to changes with short durations?
Nervous system
What is the primary function of the endocrine system in the body?
Regulation of the internal environment
What determines whether a cell or tissue is a target for a specific hormone?
Hormone receptors in the cell or tissue
Which property makes growth factors different from hormones?
Function at short distances
How do hormones affect gene expression and protein synthesis?
By impacting gene expression and protein synthesis
Explore the concepts of nervous system and endocrine system in biology. Learn about how these two systems respond to changes in the body and their roles as integrating centers. Delve into the study of hormones, metabolism, reproduction, growth, and development.
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