Ligands That Circulate Throughout the Body and Signal Developmental Differentiation

question 30

Multiple Choice

Ligands that circulate throughout the body and signal developmental differentiation are called

• A)juxtacrine factors.
• B)paracrine factors.
• C)endocrine factors.
• D)autocrine factors.

Grasp the concepts and effects of genetic disorders and variations.

Comprehend the impact of environmental factors on DNA and genetic mutations.

Recognize the role of prenatal development in human growth and the influence of teratogens.

Acknowledge the significance of reflexes and physical development in newborn infants.

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Definitions:

Latent Phase

The first stage of labor, characterized by mild, irregular contractions and gradual dilation and effacement of the cervix.

Motor Neuron

A type of neuron that conveys impulses from the central nervous system to a muscle or gland, causing it to contract or secrete.

Contraction

The process by which muscle fibers shorten and generate force, resulting in movement or tension.

Incomplete Tetanus

A state of sustained muscular contraction that is not maximal but high; muscles do not relax completely between stimuli.