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Hormone Action and Mechanisms

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Questions and Answers

What is the effect of norepinephrine on skeletal muscles?

Decreased force of contraction

Vasodilation (correct)

Increased heart rate

Vasoconstriction

Which hormone is secreted by the sustentacular cells of the testes in response to increased testosterone?

Inhibin (correct)

Epinephrine

Testosterone

Norepinephrine

What is the first step in the process of urine formation?

Reabsorption

Excretion

Secretion

Filtration (correct)

What is the mechanism of action of steroid hormones?

Diffusion through cell membranes and binding to cytoplasmic receptors Signup and view all the answers

Which hormone decreases the production of urine?

ADH Signup and view all the answers

What is a function of the kidneys?

Activation of vitamin D Signup and view all the answers

What is the primary response of the kidneys to hypoxia?

Increased production of red blood cells Signup and view all the answers

Where does the reabsorption of calcium and phosphate take place?

Proximal convoluted tubules Signup and view all the answers

What is the effect of ADH on urine production?

Decreases urine production by increasing water reabsorption Signup and view all the answers

Which hormone plays a major role in regulating fluid balance in the body?

ADH Signup and view all the answers

What is the function of the renin-angiotensin system?

Regulation of blood pressure and fluid balance Signup and view all the answers

Where does potassium secretion occur in the kidney?

Collecting ducts Signup and view all the answers

What is the primary function of progesterone in females?

To prepare the uterus for pregnancy and mammary glands for lactation Signup and view all the answers

Which gland produces a sugary fluid that nourishes sperm?

Seminal vesicle Signup and view all the answers

What is the term for the release of a mature egg from one of the ovaries?

Ovulation Signup and view all the answers

Which of the following does NOT contribute to seminal fluid?

Sperm Signup and view all the answers

What is the probability that a healthy child will be born if a woman is homozygous normal and her husband is heterozygous for a genetically inherited recessive disease?

3 out of 4 Signup and view all the answers

During which stage of cell division are chromosomes separated?

Anaphase Signup and view all the answers